diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c6c0070..cafa237 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,9 +10,14 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-go@v2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v.5.5.0
         with:
-          go-version: '^1.17.5'
+          go-version: '^1.24.3'
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@4afd733a84b1f43292c63897423277bb7f4313a9 # v8.0.0
+        with:
+          version: latest
+          args: --timeout=5m
       - run: make test
 
diff --git a/.go-version b/.go-version
new file mode 100644
index 0000000..ae96cc7
--- /dev/null
+++ b/.go-version
@@ -0,0 +1 @@
+1.24.3
diff --git a/.golangci.yml b/.golangci.yml
new file mode 100644
index 0000000..15eadfd
--- /dev/null
+++ b/.golangci.yml
@@ -0,0 +1,11 @@
+# https://golangci-lint.run/usage/configuration/
+version: '2'
+linters:
+  default: standard
+  disable:
+    - errcheck
+    - unused
+formatters:
+  enable:
+    - gofmt
+    - goimports
diff --git a/Brewfile b/Brewfile
index c9491e0..46f83f3 100644
--- a/Brewfile
+++ b/Brewfile
@@ -1,2 +1,2 @@
 brew 'go'
-brew 'hub'
+brew 'gh'
diff --git a/Makefile b/Makefile
index 4cf0474..5a43472 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 SHELL = /bin/sh
 
-VERSION=1.6.1
+VERSION=1.7.0
 BUILD=`git rev-parse HEAD`
 
 LDFLAGS=-ldflags "-w -s \
@@ -8,7 +8,6 @@ LDFLAGS=-ldflags "-w -s \
 				-X github.com/Betterment/testtrack-cli/cmds.build=${BUILD}"
 
 PACKAGES=$$(find . -maxdepth 1 -type d ! -path '.' ! -path './.*' ! -path './vendor' ! -path './dist' ! -path './script' ! -path './doc')
-LINTEXCLUDES="123nothingyet123"
 
 all: test
 
@@ -16,41 +15,30 @@ install:
 	@go install ${LDFLAGS} github.com/Betterment/testtrack-cli/testtrack
 
 dist:
-	@mkdir dist &&\
-		GOOS=linux GOARCH=amd64 go build -o "dist/testtrack.linux" ${LDFLAGS} github.com/Betterment/testtrack-cli/testtrack &&\
-		GOOS=darwin GOARCH=amd64 go build -o "dist/testtrack.darwin-amd64" ${LDFLAGS} github.com/Betterment/testtrack-cli/testtrack &&\
+	@mkdir dist && \
+		GOOS=linux GOARCH=amd64 go build -o "dist/testtrack.linux" ${LDFLAGS} github.com/Betterment/testtrack-cli/testtrack && \
+		GOOS=darwin GOARCH=amd64 go build -o "dist/testtrack.darwin-amd64" ${LDFLAGS} github.com/Betterment/testtrack-cli/testtrack && \
 		GOOS=darwin GOARCH=arm64 go build -o "dist/testtrack.darwin-arm64" ${LDFLAGS} github.com/Betterment/testtrack-cli/testtrack
 
 release: distclean dist
-	@hub release create\
-		-a dist/testtrack.linux\
-		-a dist/testtrack.darwin-amd64\
-		-a dist/testtrack.darwin-arm64\
-		-m "TestTrack CLI ${VERSION}"\
-		-t "${BUILD}"\
-		v${VERSION}
+	@(gh release view v${VERSION} > /dev/null 2>&1 \
+		&& echo "v${VERSION} has already been released.") \
+		|| gh release create v${VERSION} \
+			dist/testtrack.linux \
+			dist/testtrack.darwin-amd64 \
+			dist/testtrack.darwin-arm64 \
+			--title "TestTrack CLI ${VERSION}" \
+			--target "${BUILD}" \
+			--generate-notes
 
 test:
-	@go install golang.org/x/tools/cmd/goimports@latest
-	@go install golang.org/x/lint/golint@latest
-	@GOIMPORTS_RESULT=$$($$(go env GOPATH)/bin/goimports -l ${PACKAGES} | grep -v ${LINTEXCLUDES});\
-		if [ $$(echo "$$GOIMPORTS_RESULT\c" | head -c1 | wc -c) -ne 0 ];\
-			then\
-				echo "Style violations found. Run the following command to fix:";\
-				echo;\
-				echo "$$(go env GOPATH)/bin/goimports -w" $$GOIMPORTS_RESULT;\
-				echo;\
-				exit 1;\
-			fi
-	@go vet ${PACKAGES}
-	@GOLINT_RESULT=$$($$(go env GOPATH)/bin/golint ${PACKAGES} | grep -v ${LINTEXCLUDES});\
-		if [ $$(echo "$$GOLINT_RESULT\c" | head -c1 | wc -c) -ne 0 ];\
-			then\
-				echo $$GOLINT_RESULT;\
-				exit 1;\
-			fi
 	@go test ${PACKAGES}
 
+lint:
+	golangci-lint version &>/dev/null || brew install golangci-lint
+	golangci-lint fmt --verbose
+	golangci-lint run --verbose --timeout 5m
+
 cover:
 	@echo "What package do you want a coverage report for? \c"
 	@read PACKAGE &&\
@@ -68,4 +56,4 @@ clean:
 distclean: clean
 	@rm -rf dist
 
-.PHONY: all build install check clean distclean test
+.PHONY: all build install clean distclean test
diff --git a/cmds/generate_build_timestamp.go b/cmds/generate_build_timestamp.go
index 54c7376..02def0f 100644
--- a/cmds/generate_build_timestamp.go
+++ b/cmds/generate_build_timestamp.go
@@ -1,7 +1,6 @@
 package cmds
 
 import (
-	"io/ioutil"
 	"os"
 	"time"
 
@@ -36,5 +35,5 @@ func generateBuildTimestamp() error {
 		return err
 	}
 
-	return ioutil.WriteFile("testtrack/build_timestamp", timestamp, 0644)
+	return os.WriteFile("testtrack/build_timestamp", timestamp, 0644)
 }
diff --git a/cmds/init_project.go b/cmds/init_project.go
index 5dbdba6..2078b17 100644
--- a/cmds/init_project.go
+++ b/cmds/init_project.go
@@ -1,7 +1,6 @@
 package cmds
 
 import (
-	"io/ioutil"
 	"log"
 	"os"
 
@@ -40,7 +39,7 @@ func initProject() error {
 	}
 	keepfile.Close()
 
-	if err := ioutil.WriteFile("testtrack/.gitignore", []byte("build_timestamp\n"), 0644); err != nil {
+	if err := os.WriteFile("testtrack/.gitignore", []byte("build_timestamp\n"), 0644); err != nil {
 		log.Fatal(err)
 	}
 
diff --git a/fakeassignments/fakeassignments.go b/fakeassignments/fakeassignments.go
index 2714a59..f87726b 100644
--- a/fakeassignments/fakeassignments.go
+++ b/fakeassignments/fakeassignments.go
@@ -1,11 +1,9 @@
 package fakeassignments
 
 import (
-	"io/ioutil"
 	"os"
 
 	"github.com/Betterment/testtrack-cli/paths"
-
 	"gopkg.in/yaml.v2"
 )
 
@@ -20,12 +18,12 @@ func Read() (*map[string]string, error) {
 		if err != nil {
 			return nil, err
 		}
-		err = ioutil.WriteFile(*configDir+"/assignments.yml", []byte("{}"), 0644)
+		err = os.WriteFile(*configDir+"/assignments.yml", []byte("{}"), 0644)
 		if err != nil {
 			return nil, err
 		}
 	}
-	assignmentsBytes, err := ioutil.ReadFile(*configDir + "/assignments.yml")
+	assignmentsBytes, err := os.ReadFile(*configDir + "/assignments.yml")
 	if err != nil {
 		return nil, err
 	}
@@ -47,7 +45,7 @@ func Write(assignments *map[string]string) error {
 	if err != nil {
 		return err
 	}
-	err = ioutil.WriteFile(*configDir+"/assignments.yml", bytes, 0644)
+	err = os.WriteFile(*configDir+"/assignments.yml", bytes, 0644)
 	if err != nil {
 		return err
 	}
diff --git a/fakeserver/routes.go b/fakeserver/routes.go
index 77f83ba..4730be6 100644
--- a/fakeserver/routes.go
+++ b/fakeserver/routes.go
@@ -3,7 +3,7 @@ package fakeserver
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"strings"
 
@@ -341,7 +341,7 @@ func postV1AssignmentOverride(r *http.Request) error {
 			Variant:   r.PostForm.Get("variant"),
 		}
 	case strings.HasPrefix(contentType, "application/json"):
-		requestBytes, err := ioutil.ReadAll(r.Body)
+		requestBytes, err := io.ReadAll(r.Body)
 		if err != nil {
 			return err
 		}
@@ -353,6 +353,10 @@ func postV1AssignmentOverride(r *http.Request) error {
 		return fmt.Errorf("got unexpected content type %s", contentType)
 	}
 	assignments, err := fakeassignments.Read()
+	if err != nil {
+		return err
+	}
+
 	(*assignments)[assignment.SplitName] = assignment.Variant
 	err = fakeassignments.Write(assignments)
 	if err != nil {
@@ -366,7 +370,7 @@ func postV2AssignmentOverride(r *http.Request) error {
 	contentType := r.Header.Get("content-type")
 	switch {
 	case strings.HasPrefix(contentType, "application/json"):
-		requestBytes, err := ioutil.ReadAll(r.Body)
+		requestBytes, err := io.ReadAll(r.Body)
 		if err != nil {
 			return err
 		}
@@ -380,6 +384,10 @@ func postV2AssignmentOverride(r *http.Request) error {
 		return fmt.Errorf("got unexpected content type %s", contentType)
 	}
 	storedAssignments, err := fakeassignments.Read()
+	if err != nil {
+		return err
+	}
+
 	for _, assignment := range assignments {
 		(*storedAssignments)[assignment.SplitName] = assignment.Variant
 	}
@@ -453,12 +461,12 @@ func getV1SplitDetail() (interface{}, error) {
 		Location:           "location",
 		Platform:           "platform",
 		VariantDetails: []v1VariantDetail{
-			v1VariantDetail{
+			{
 				Name:          "variant_a",
 				Description:   "this is a fake description",
 				ScreenshotURL: "https://example.org/a",
 			},
-			v1VariantDetail{
+			{
 				Name:          "variant_b",
 				Description:   "this is another fake description",
 				ScreenshotURL: "https://example.org/b",
diff --git a/fakeserver/server_test.go b/fakeserver/server_test.go
index 836646a..bca788a 100644
--- a/fakeserver/server_test.go
+++ b/fakeserver/server_test.go
@@ -2,7 +2,6 @@ package fakeserver
 
 import (
 	"bytes"
-	"io/ioutil"
 	"log"
 	"net/http"
 	"net/http/httptest"
@@ -41,7 +40,7 @@ something_something_enabled: "true"
 func TestMain(m *testing.M) {
 	current, exists := os.LookupEnv("TESTTRACK_FAKE_SERVER_CONFIG_DIR")
 
-	dir, err := ioutil.TempDir("", "testtrack-cli")
+	dir, err := os.MkdirTemp("", "testtrack-cli")
 	if err != nil {
 		log.Fatal(err)
 	}
@@ -53,12 +52,12 @@ func TestMain(m *testing.M) {
 	}
 
 	schemaContent := []byte(testSchema)
-	if err := ioutil.WriteFile(filepath.Join(schemasDir, "test.yml"), schemaContent, 0644); err != nil {
+	if err := os.WriteFile(filepath.Join(schemasDir, "test.yml"), schemaContent, 0644); err != nil {
 		log.Fatal(err)
 	}
 
 	assignmentsContent := []byte(testAssignments)
-	if err := ioutil.WriteFile(filepath.Join(dir, "assignments.yml"), assignmentsContent, 0644); err != nil {
+	if err := os.WriteFile(filepath.Join(dir, "assignments.yml"), assignmentsContent, 0644); err != nil {
 		log.Fatal(err)
 	}
 
@@ -230,7 +229,7 @@ func TestCors(t *testing.T) {
 		h.ServeHTTP(w, request)
 
 		require.Equal(t, http.StatusOK, w.Code)
-		require.Equal(t, "", w.HeaderMap.Get("Access-Control-Allow-Origin"))
+		require.Equal(t, "", w.Result().Header.Get("Access-Control-Allow-Origin"))
 	})
 
 	t.Run("it passes cors with an allowed origin", func(t *testing.T) {
@@ -243,7 +242,7 @@ func TestCors(t *testing.T) {
 		h.ServeHTTP(w, request)
 
 		require.Equal(t, http.StatusOK, w.Code)
-		require.Equal(t, "http://www.allowed.com", w.HeaderMap.Get("Access-Control-Allow-Origin"))
+		require.Equal(t, "http://www.allowed.com", w.Result().Header.Get("Access-Control-Allow-Origin"))
 	})
 
 	t.Run("it passes cors from localhost", func(t *testing.T) {
@@ -256,7 +255,7 @@ func TestCors(t *testing.T) {
 		h.ServeHTTP(w, request)
 
 		require.Equal(t, http.StatusOK, w.Code)
-		require.Equal(t, "http://localhost:3000", w.HeaderMap.Get("Access-Control-Allow-Origin"))
+		require.Equal(t, "http://localhost:3000", w.Result().Header.Get("Access-Control-Allow-Origin"))
 	})
 
 	t.Run("it passes cors from loopback ip", func(t *testing.T) {
@@ -269,7 +268,7 @@ func TestCors(t *testing.T) {
 		h.ServeHTTP(w, request)
 
 		require.Equal(t, http.StatusOK, w.Code)
-		require.Equal(t, "http://127.0.0.1:3000", w.HeaderMap.Get("Access-Control-Allow-Origin"))
+		require.Equal(t, "http://127.0.0.1:3000", w.Result().Header.Get("Access-Control-Allow-Origin"))
 	})
 
 	os.Unsetenv("TESTTRACK_ALLOWED_ORIGINS")
@@ -305,11 +304,11 @@ func TestPersistAssignmentV2(t *testing.T) {
 
 		overrides := v2AssignmentOverrideRequestBody{
 			Assignments: []v1Assignment{
-				v1Assignment{
+				{
 					SplitName: "test.test_experiment",
 					Variant:   "control",
 				},
-				v1Assignment{
+				{
 					SplitName: "test.test2_experiment",
 					Variant:   "treatment",
 				},
diff --git a/featurecompletions/featurecompletions.go b/featurecompletions/featurecompletions.go
index b952661..6131059 100644
--- a/featurecompletions/featurecompletions.go
+++ b/featurecompletions/featurecompletions.go
@@ -114,7 +114,7 @@ func (f *FeatureCompletion) ApplyToSchema(schema *serializers.Schema, _ migratio
 		if idempotently {
 			return nil
 		}
-		return fmt.Errorf("Couldn't locate feature_completion of %s in schema", *f.featureGate)
+		return fmt.Errorf("couldn't locate feature_completion of %s in schema", *f.featureGate)
 	}
 	for i, candidate := range schema.FeatureCompletions { // Replace
 		if candidate.FeatureGate == *f.featureGate {
diff --git a/go.mod b/go.mod
index 3eee947..58fbf41 100644
--- a/go.mod
+++ b/go.mod
@@ -1,20 +1,20 @@
 module github.com/Betterment/testtrack-cli
 
-go 1.17
+go 1.24
 
 require (
-	github.com/gorilla/mux v1.7.1
-	github.com/joho/godotenv v1.3.0
-	github.com/pkg/errors v0.8.1
-	github.com/rs/cors v1.6.0
-	github.com/spf13/cobra v0.0.3
-	github.com/stretchr/testify v1.3.0
-	gopkg.in/yaml.v2 v2.2.4
+	github.com/gorilla/mux v1.8.1
+	github.com/joho/godotenv v1.5.1
+	github.com/rs/cors v1.11.1
+	github.com/spf13/cobra v1.9.1
+	github.com/stretchr/testify v1.10.0
+	gopkg.in/yaml.v2 v2.4.0
 )
 
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/inconshreveable/mousetrap v1.0.0 // indirect
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/spf13/pflag v1.0.3 // indirect
+	github.com/spf13/pflag v1.0.6 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
diff --git a/go.sum b/go.sum
index 62256d4..b7ef1fc 100644
--- a/go.sum
+++ b/go.sum
@@ -1,26 +1,26 @@
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/cpuguy83/go-md2man/v2 v2.0.6/go.mod h1:oOW0eioCTA6cOiMLiUPZOpcVxMig6NIQQ7OS05n1F4g=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/gorilla/mux v1.7.1 h1:Dw4jY2nghMMRsh1ol8dv1axHkDwMQK2DHerMNJsIpJU=
-github.com/gorilla/mux v1.7.1/go.mod h1:1lud6UwP+6orDFRuTfBEV8e9/aOM/c4fVVCaMa2zaAs=
-github.com/inconshreveable/mousetrap v1.0.0 h1:Z8tu5sraLXCXIcARxBp/8cbvlwVa7Z1NHg9XEKhtSvM=
-github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
-github.com/joho/godotenv v1.3.0 h1:Zjp+RcGpHhGlrMbJzXTrZZPrWj+1vfm90La1wgB6Bhc=
-github.com/joho/godotenv v1.3.0/go.mod h1:7hK45KPybAkOC6peb+G5yklZfMxEjkZhHbwpqxOKXbg=
-github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
-github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/gorilla/mux v1.8.1 h1:TuBL49tXwgrFYWhqrNgrUNEY92u81SPhu7sTdzQEiWY=
+github.com/gorilla/mux v1.8.1/go.mod h1:AKf9I4AEqPTmMytcMc0KkNouC66V3BtZ4qD5fmWSiMQ=
+github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
+github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
+github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
+github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/rs/cors v1.6.0 h1:G9tHG9lebljV9mfp9SNPDL36nCDxmo3zTlAf1YgvzmI=
-github.com/rs/cors v1.6.0/go.mod h1:gFx+x8UowdsKA9AchylcLynDq+nNFfI8FkUZdN/jGCU=
-github.com/spf13/cobra v0.0.3 h1:ZlrZ4XsMRm04Fr5pSFxBgfND2EBVa1nLpiy1stUsX/8=
-github.com/spf13/cobra v0.0.3/go.mod h1:1l0Ry5zgKvJasoi3XT1TypsSe7PqH0Sj9dhYf7v3XqQ=
-github.com/spf13/pflag v1.0.3 h1:zPAT6CGy6wXeQ7NtTnaTerfKOsV6V6F8agHXFiazDkg=
-github.com/spf13/pflag v1.0.3/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
-github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
-github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+github.com/rs/cors v1.11.1 h1:eU3gRzXLRK57F5rKMGMZURNdIG4EoAmX8k94r9wXWHA=
+github.com/rs/cors v1.11.1/go.mod h1:XyqrcTp5zjWr1wsJ8PIRZssZ8b/WMcMf71DJnit4EMU=
+github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/spf13/cobra v1.9.1 h1:CXSaggrXdbHK9CF+8ywj8Amf7PBRmPCOJugH954Nnlo=
+github.com/spf13/cobra v1.9.1/go.mod h1:nDyEzZ8ogv936Cinf6g1RU9MRY64Ir93oCnqb9wxYW0=
+github.com/spf13/pflag v1.0.6 h1:jFzHGLGAlb3ruxLB8MhbI6A8+AQX/2eW4qeyNZXNp2o=
+github.com/spf13/pflag v1.0.6/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
+github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
+github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v2 v2.2.4 h1:/eiJrUcujPVeJ3xlSWaiNi3uSVmDGBK1pDHUHAnao1I=
-gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/migrationloaders/migrationloaders.go b/migrationloaders/migrationloaders.go
index 931f7bd..8310ec5 100644
--- a/migrationloaders/migrationloaders.go
+++ b/migrationloaders/migrationloaders.go
@@ -2,7 +2,7 @@ package migrationloaders
 
 import (
 	"fmt"
-	"io/ioutil"
+	"os"
 	"path"
 	"strings"
 
@@ -19,7 +19,7 @@ import (
 
 // Load loads a set of migrations
 func Load() (migrations.Repository, error) {
-	files, err := ioutil.ReadDir("testtrack/migrate")
+	files, err := os.ReadDir("testtrack/migrate")
 	if err != nil {
 		return nil, err
 	}
@@ -35,7 +35,7 @@ func Load() (migrations.Repository, error) {
 			return nil, err
 		}
 
-		fileBytes, err := ioutil.ReadFile(path.Join("testtrack/migrate", file.Name()))
+		fileBytes, err := os.ReadFile(path.Join("testtrack/migrate", file.Name()))
 		if err != nil {
 			return nil, err
 		}
diff --git a/migrationmanagers/migrationmanagers.go b/migrationmanagers/migrationmanagers.go
index b2edba5..2d43455 100644
--- a/migrationmanagers/migrationmanagers.go
+++ b/migrationmanagers/migrationmanagers.go
@@ -1,8 +1,8 @@
 package migrationmanagers
 
 import (
+	"errors"
 	"fmt"
-	"io/ioutil"
 	"os"
 
 	"github.com/Betterment/testtrack-cli/migrationloaders"
@@ -10,7 +10,6 @@ import (
 	"github.com/Betterment/testtrack-cli/schema"
 	"github.com/Betterment/testtrack-cli/serializers"
 	"github.com/Betterment/testtrack-cli/servers"
-	"github.com/pkg/errors"
 	"gopkg.in/yaml.v2"
 )
 
@@ -117,7 +116,7 @@ func (m *MigrationManager) Sync() error {
 	case 204:
 		return nil
 	case 422:
-		return errors.New("Migration unsuccessful on server. Does your split exist?")
+		return errors.New("migration unsuccessful on server. Does your split exist?")
 	default:
 		return fmt.Errorf("got %d status code", resp.StatusCode)
 	}
@@ -126,7 +125,7 @@ func (m *MigrationManager) Sync() error {
 func (m *MigrationManager) persistFile() error {
 	stat, err := os.Stat("testtrack/migrate")
 	if err != nil {
-		return errors.Wrap(err, "migration directory not found - run `testtrack init_project` to resolve")
+		return fmt.Errorf("migration directory not found - run `testtrack init_project` to resolve: %w", err)
 	}
 
 	if !stat.IsDir() {
@@ -134,8 +133,11 @@ func (m *MigrationManager) persistFile() error {
 	}
 
 	out, err := yaml.Marshal(m.migration.File())
+	if err != nil {
+		return fmt.Errorf("failed to marshal migration file: %w", err)
+	}
 
-	err = ioutil.WriteFile(fmt.Sprintf("testtrack/migrate/%s", *m.migration.Filename()), out, 0644)
+	err = os.WriteFile(fmt.Sprintf("testtrack/migrate/%s", *m.migration.Filename()), out, 0644)
 	if err != nil {
 		return err
 	}
diff --git a/migrations/migrations.go b/migrations/migrations.go
index d5186ac..9f5497f 100644
--- a/migrations/migrations.go
+++ b/migrations/migrations.go
@@ -1,6 +1,7 @@
 package migrations
 
 import (
+	"errors"
 	"fmt"
 	"path/filepath"
 	"regexp"
@@ -9,7 +10,6 @@ import (
 	"time"
 
 	"github.com/Betterment/testtrack-cli/serializers"
-	"github.com/pkg/errors"
 )
 
 // IMigration represents a migration
@@ -49,7 +49,7 @@ func GenerateMigrationVersion() (*string, error) {
 	lastMatch := matches[len(matches)-1]
 	matches = migrationFilenameRegex.FindStringSubmatch(filepath.Base(lastMatch))
 	if matches == nil {
-		return nil, fmt.Errorf("Failed to parse migration filename %s", lastMatch)
+		return nil, fmt.Errorf("failed to parse migration filename %s", lastMatch)
 	}
 
 	var i int
@@ -58,7 +58,7 @@ func GenerateMigrationVersion() (*string, error) {
 	} else if len(matches[1]) == 17 {
 		i, err = strconv.Atoi(matches[1][14:17])
 		if err != nil {
-			return nil, errors.Wrap(err, "couldn't parse file version")
+			return nil, fmt.Errorf("couldn't parse file version: %w", err)
 		}
 		i++
 	} else {
diff --git a/remotekills/remotekills.go b/remotekills/remotekills.go
index ac3c5e8..d921b0e 100644
--- a/remotekills/remotekills.go
+++ b/remotekills/remotekills.go
@@ -142,7 +142,7 @@ func (r *RemoteKill) ApplyToSchema(schema *serializers.Schema, _ migrations.Repo
 		if idempotently {
 			return nil
 		}
-		return fmt.Errorf("Couldn't locate remote_kill %s of %s in schema", *r.reason, *r.split)
+		return fmt.Errorf("couldn't locate remote_kill %s of %s in schema", *r.reason, *r.split)
 	}
 	for i, candidate := range schema.RemoteKills { // Replace
 		if candidate.Split == *r.split && candidate.Reason == *r.reason {
diff --git a/schema/schema.go b/schema/schema.go
index ed4debd..cdc66e0 100644
--- a/schema/schema.go
+++ b/schema/schema.go
@@ -3,7 +3,6 @@ package schema
 import (
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path"
 	"path/filepath"
@@ -21,7 +20,7 @@ func Read() (*serializers.Schema, error) {
 	if _, err := os.Stat("testtrack/schema.yml"); os.IsNotExist(err) {
 		return Generate()
 	}
-	schemaBytes, err := ioutil.ReadFile("testtrack/schema.yml")
+	schemaBytes, err := os.ReadFile("testtrack/schema.yml")
 	if err != nil {
 		return nil, err
 	}
@@ -55,8 +54,11 @@ func Generate() (*serializers.Schema, error) {
 func Write(schema *serializers.Schema) error {
 	SortAlphabetically(schema)
 	out, err := yaml.Marshal(schema)
+	if err != nil {
+		return err
+	}
 
-	err = ioutil.WriteFile("testtrack/schema.yml", out, 0644)
+	err = os.WriteFile("testtrack/schema.yml", out, 0644)
 	if err != nil {
 		return err
 	}
@@ -113,7 +115,7 @@ func ReadMerged() (*serializers.Schema, error) {
 			}
 		}
 		// Read file
-		schemaBytes, err := ioutil.ReadFile(path)
+		schemaBytes, err := os.ReadFile(path)
 		if err != nil {
 			return nil, err
 		}
@@ -123,18 +125,10 @@ func ReadMerged() (*serializers.Schema, error) {
 			return nil, err
 		}
 		// Merge into master schema
-		for _, split := range schema.Splits {
-			mergedSchema.Splits = append(mergedSchema.Splits, split)
-		}
-		for _, featureCompletion := range schema.FeatureCompletions {
-			mergedSchema.FeatureCompletions = append(mergedSchema.FeatureCompletions, featureCompletion)
-		}
-		for _, remoteKill := range schema.RemoteKills {
-			mergedSchema.RemoteKills = append(mergedSchema.RemoteKills, remoteKill)
-		}
-		for _, identifierType := range schema.IdentifierTypes {
-			mergedSchema.IdentifierTypes = append(mergedSchema.IdentifierTypes, identifierType)
-		}
+		mergedSchema.Splits = append(mergedSchema.Splits, schema.Splits...)
+		mergedSchema.FeatureCompletions = append(mergedSchema.FeatureCompletions, schema.FeatureCompletions...)
+		mergedSchema.RemoteKills = append(mergedSchema.RemoteKills, schema.RemoteKills...)
+		mergedSchema.IdentifierTypes = append(mergedSchema.IdentifierTypes, schema.IdentifierTypes...)
 	}
 	return &mergedSchema, nil
 }
@@ -143,7 +137,7 @@ func mergeLegacySchema(schema *serializers.Schema) error {
 	if _, err := os.Stat("db/test_track_schema.yml"); os.IsNotExist(err) {
 		return nil
 	}
-	legacySchemaBytes, err := ioutil.ReadFile("db/test_track_schema.yml")
+	legacySchemaBytes, err := os.ReadFile("db/test_track_schema.yml")
 	if err != nil {
 		return err
 	}
diff --git a/schemaloaders/schemaloaders.go b/schemaloaders/schemaloaders.go
index a7665e8..222ce08 100644
--- a/schemaloaders/schemaloaders.go
+++ b/schemaloaders/schemaloaders.go
@@ -14,7 +14,6 @@ import (
 	"github.com/Betterment/testtrack-cli/servers"
 	"github.com/Betterment/testtrack-cli/splitdecisions"
 	"github.com/Betterment/testtrack-cli/splits"
-	"github.com/pkg/errors"
 )
 
 // SchemaLoader loads schemas into TestTrack
@@ -101,7 +100,7 @@ func schemaSplitMigrations(schemaSplit serializers.SchemaSplit) ([]migrations.IM
 		var decision *string
 		weights, err := splits.WeightsFromYAML(schemaSplit.Weights)
 		if err != nil {
-			return nil, errors.Wrap(err, fmt.Sprintf("schema split %s invalid", schemaSplit.Name))
+			return nil, fmt.Errorf("schema split %s invalid: %w", schemaSplit.Name, err)
 		}
 		for variant, weight := range *weights {
 			if weight == 100 {
diff --git a/servers/servers.go b/servers/servers.go
index b0c3019..1887312 100644
--- a/servers/servers.go
+++ b/servers/servers.go
@@ -5,7 +5,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/url"
 	"os"
@@ -57,7 +57,7 @@ func (s *Server) Get(path string, v interface{}) error {
 		return fmt.Errorf("got %d status code", resp.StatusCode)
 	}
 
-	bodyBytes, err := ioutil.ReadAll(resp.Body)
+	bodyBytes, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return err
 	}
diff --git a/splitdecisions/splitdecisions.go b/splitdecisions/splitdecisions.go
index e5533c0..cf8dfe1 100644
--- a/splitdecisions/splitdecisions.go
+++ b/splitdecisions/splitdecisions.go
@@ -7,7 +7,6 @@ import (
 	"github.com/Betterment/testtrack-cli/serializers"
 	"github.com/Betterment/testtrack-cli/splits"
 	"github.com/Betterment/testtrack-cli/validations"
-	"github.com/pkg/errors"
 )
 
 // SplitDecision represents a feature we're marking (un)completed
@@ -104,7 +103,7 @@ func (s *SplitDecision) ApplyToSchema(schema *serializers.Schema, migrationRepo
 			}
 			err = weights.ReweightToDecision(*s.variant)
 			if err != nil {
-				return errors.Wrap(err, fmt.Sprintf("in split %s in schema", *s.split))
+				return fmt.Errorf("in split %s in schema: %w", *s.split, err)
 			}
 			schema.Splits[i].Weights = weights.ToYAML()
 			return nil
@@ -116,7 +115,7 @@ func (s *SplitDecision) ApplyToSchema(schema *serializers.Schema, migrationRepo
 			weights := split.Weights()
 			err := weights.ReweightToDecision(*s.variant)
 			if err != nil {
-				return errors.Wrap(err, fmt.Sprintf("in most recent split migration %s", *s.split))
+				return fmt.Errorf("in most recent split migration %s: %w", *s.split, err)
 			}
 			schema.Splits = append(schema.Splits, serializers.SchemaSplit{
 				Name:    *s.split,
@@ -129,5 +128,5 @@ func (s *SplitDecision) ApplyToSchema(schema *serializers.Schema, migrationRepo
 	if idempotently {
 		return nil
 	}
-	return fmt.Errorf("Couldn't locate split %s in schema to decide", *s.split)
+	return fmt.Errorf("couldn't locate split %s in schema to decide", *s.split)
 }
diff --git a/splitretirements/splitretirements.go b/splitretirements/splitretirements.go
index 14b24a3..a0f18fc 100644
--- a/splitretirements/splitretirements.go
+++ b/splitretirements/splitretirements.go
@@ -7,7 +7,6 @@ import (
 	"github.com/Betterment/testtrack-cli/serializers"
 	"github.com/Betterment/testtrack-cli/splits"
 	"github.com/Betterment/testtrack-cli/validations"
-	"github.com/pkg/errors"
 )
 
 // SplitRetirement represents a feature we're marking (un)completed
@@ -103,7 +102,7 @@ func (s *SplitRetirement) ApplyToSchema(schema *serializers.Schema, _ migrations
 			}
 			err = weights.ReweightToDecision(*s.decision)
 			if err != nil {
-				return errors.Wrap(err, fmt.Sprintf("in split %s in schema", *s.split))
+				return fmt.Errorf("in split %s in schema: %w", *s.split, err)
 			}
 			schema.Splits = append(schema.Splits[:i], schema.Splits[i+1:]...)
 			return nil
diff --git a/validations/validations.go b/validations/validations.go
index 27f5272..79e4185 100644
--- a/validations/validations.go
+++ b/validations/validations.go
@@ -2,7 +2,6 @@ package validations
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"regexp"
 	"strings"
@@ -94,7 +93,7 @@ func ValidateOwnerName(owner string) error {
 		return fmt.Errorf("owner must be specified when ownership file (%s) exists", ownershipFilePath)
 	}
 
-	fileBytes, err := ioutil.ReadFile(ownershipFilePath)
+	fileBytes, err := os.ReadFile(ownershipFilePath)
 	if err != nil {
 		return err
 	}
diff --git a/validations/validations_test.go b/validations/validations_test.go
index 91bb1bb..7c0cd13 100644
--- a/validations/validations_test.go
+++ b/validations/validations_test.go
@@ -65,7 +65,7 @@ func TestAutoPrefixAndValidateSplit(t *testing.T) {
 		currentAppName := "my_app"
 		schema := &serializers.Schema{
 			Splits: []serializers.SchemaSplit{
-				serializers.SchemaSplit{
+				{
 					Name: "my_app.foo_enabled",
 				},
 			},
@@ -83,10 +83,10 @@ func TestAutoPrefixAndValidateSplit(t *testing.T) {
 		currentAppName := "my_app"
 		schema := &serializers.Schema{
 			Splits: []serializers.SchemaSplit{
-				serializers.SchemaSplit{
+				{
 					Name: "foo_enabled",
 				},
-				serializers.SchemaSplit{
+				{
 					Name: "my_app.foo_enabled",
 				},
 			},
@@ -116,10 +116,10 @@ func TestAutoPrefixAndValidateSplit(t *testing.T) {
 		currentAppName := "my_app"
 		schema := &serializers.Schema{
 			Splits: []serializers.SchemaSplit{
-				serializers.SchemaSplit{
+				{
 					Name: "my_app.foo_enabled",
 				},
-				serializers.SchemaSplit{
+				{
 					Name: "foo_enabled",
 				},
 			},