diff --git a/.rubocop.yml b/.rubocop.yml
index ead36597..f7f981fe 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -2,7 +2,7 @@
 plugins: rubocop-rake
 AllCops:
   NewCops: enable
-  TargetRubyVersion: 3.2
+  TargetRubyVersion: 3.4
   DisplayCopNames: true
   Exclude:
     - "**/node_modules/**/*"
diff --git a/.ruby-version b/.ruby-version
index 9c25013d..2f4b6075 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.3.6
+3.4
diff --git a/package-lock.json b/package-lock.json
index 83630944..e845b07b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,7 +8,7 @@
       "name": "@artichokeruby/ruby-strftime",
       "version": "0.0.0",
       "devDependencies": {
-        "prettier": "^3.5.3"
+        "prettier": "3.5.3"
       }
     },
     "node_modules/prettier": {
diff --git a/package.json b/package.json
index ee153691..09bed06e 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
   "homepage": "https://www.artichokeruby.org",
   "bugs": "https://github.com/artichoke/ruby-strftime/issues",
   "devDependencies": {
-    "prettier": "^3.5.3"
+    "prettier": "3.5.3"
   },
   "scripts": {
     "fmt": "prettier --write \"**/*\""