diff --git a/CHANGELOG.md b/CHANGELOG.md
index 27a2da07..fdde0227 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@ All notable changes to this project will be documented in this file.
 ### Added
 
 - Run a `containerdebug` process in the background of each OPA container to collect debugging information ([#666]).
+- Added support for OPA `1.0.0` ([#677]).
 - Aggregate emitted Kubernetes events on the CustomResources ([#675]).
 
 ### Fixed
@@ -15,8 +16,13 @@ All notable changes to this project will be documented in this file.
   deployed in one namespace. Existing Stacklets will use the newly created ServiceAccounts after
   restart ([#656]).
 
+### Removed
+
+- Removed support for OPA `0.66.0` ([#677]).
+
 [#656]: https://github.com/stackabletech/opa-operator/pull/656
 [#666]: https://github.com/stackabletech/opa-operator/pull/666
+[#677]: https://github.com/stackabletech/opa-operator/pull/677
 [#675]: https://github.com/stackabletech/opa-operator/pull/675
 
 ## [24.11.0] - 2024-11-18
diff --git a/docs/modules/opa/examples/getting_started/getting_started.sh b/docs/modules/opa/examples/getting_started/getting_started.sh
index 317b53c8..ef33dd75 100755
--- a/docs/modules/opa/examples/getting_started/getting_started.sh
+++ b/docs/modules/opa/examples/getting_started/getting_started.sh
@@ -74,7 +74,7 @@ sleep 5
 
 request_hello() {
 # tag::request-hello[]
-curl -s http://localhost:8081/v1/data/test/hello
+curl -s http://localhost:8081/v1/data/test/hello -d '{"input": {}}'
 # end::request-hello[]
 }
 
@@ -91,7 +91,7 @@ fi
 
 request_world() {
 # tag::request-world[]
-curl -s http://localhost:8081/v1/data/test/world
+curl -s http://localhost:8081/v1/data/test/world -d '{"input": {}}'
 # end::request-world[]
 }
 
diff --git a/docs/modules/opa/examples/getting_started/getting_started.sh.j2 b/docs/modules/opa/examples/getting_started/getting_started.sh.j2
index fdf90955..17648844 100755
--- a/docs/modules/opa/examples/getting_started/getting_started.sh.j2
+++ b/docs/modules/opa/examples/getting_started/getting_started.sh.j2
@@ -74,7 +74,7 @@ sleep 5
 
 request_hello() {
 # tag::request-hello[]
-curl -s http://localhost:8081/v1/data/test/hello
+curl -s http://localhost:8081/v1/data/test/hello -d '{"input": {}}'
 # end::request-hello[]
 }
 
@@ -91,7 +91,7 @@ fi
 
 request_world() {
 # tag::request-world[]
-curl -s http://localhost:8081/v1/data/test/world
+curl -s http://localhost:8081/v1/data/test/world -d '{"input": {}}'
 # end::request-world[]
 }
 
diff --git a/docs/modules/opa/examples/getting_started/opa.yaml b/docs/modules/opa/examples/getting_started/opa.yaml
index c1853f64..b2e191cd 100644
--- a/docs/modules/opa/examples/getting_started/opa.yaml
+++ b/docs/modules/opa/examples/getting_started/opa.yaml
@@ -5,7 +5,7 @@ metadata:
   name: simple-opa
 spec:
   image:
-    productVersion: "0.67.1"
+    productVersion: "1.0.0"
   servers:
     roleGroups:
       default: {}
diff --git a/docs/modules/opa/examples/getting_started/opa.yaml.j2 b/docs/modules/opa/examples/getting_started/opa.yaml.j2
index c1853f64..b2e191cd 100644
--- a/docs/modules/opa/examples/getting_started/opa.yaml.j2
+++ b/docs/modules/opa/examples/getting_started/opa.yaml.j2
@@ -5,7 +5,7 @@ metadata:
   name: simple-opa
 spec:
   image:
-    productVersion: "0.67.1"
+    productVersion: "1.0.0"
   servers:
     roleGroups:
       default: {}
diff --git a/docs/modules/opa/examples/getting_started/simple-rule.yaml b/docs/modules/opa/examples/getting_started/simple-rule.yaml
index 3a3914aa..3d1ce379 100644
--- a/docs/modules/opa/examples/getting_started/simple-rule.yaml
+++ b/docs/modules/opa/examples/getting_started/simple-rule.yaml
@@ -9,10 +9,10 @@ data:
   test.rego: |
     package test
 
-    hello {
+    hello if {
       true
     }
 
-    world {
+    world if {
       false
     }
diff --git a/docs/modules/opa/pages/usage-guide/user-info-fetcher.adoc b/docs/modules/opa/pages/usage-guide/user-info-fetcher.adoc
index 81cf5048..6c9f90ba 100644
--- a/docs/modules/opa/pages/usage-guide/user-info-fetcher.adoc
+++ b/docs/modules/opa/pages/usage-guide/user-info-fetcher.adoc
@@ -16,7 +16,7 @@ metadata:
   name: opa
 spec:
   image:
-    productVersion: 0.67.1
+    productVersion: 1.0.0
   clusterConfig:
     userInfo: # <1>
       backend:
@@ -132,8 +132,6 @@ For example, the following rule allows access for users in the `/admin` group:
 ----
 package test
 
-import rego.v1
-
 default allow := false
 
 allow if {
diff --git a/docs/modules/opa/partials/supported-versions.adoc b/docs/modules/opa/partials/supported-versions.adoc
index f7b0d816..f221808e 100644
--- a/docs/modules/opa/partials/supported-versions.adoc
+++ b/docs/modules/opa/partials/supported-versions.adoc
@@ -2,5 +2,5 @@
 // This is a separate file, since it is used by both the direct OPA documentation, and the overarching
 // Stackable Platform documentation.
 
-* 0.67.1
-* 0.66.0 (deprecated)
+* 1.0.0
+* 0.67.1 (deprecated)
diff --git a/tests/templates/kuttl/smoke/10-install-opa.yaml.j2 b/tests/templates/kuttl/smoke/10-install-opa.yaml.j2
index cc96013b..78b443bb 100644
--- a/tests/templates/kuttl/smoke/10-install-opa.yaml.j2
+++ b/tests/templates/kuttl/smoke/10-install-opa.yaml.j2
@@ -9,11 +9,11 @@ data:
   test.rego: |
     package test
 
-    hello {
+    hello if {
       true
     }
 
-    world {
+    world if {
       false
     }
 ---
diff --git a/tests/templates/kuttl/smoke/test-regorule.py b/tests/templates/kuttl/smoke/test-regorule.py
index 0727ae8e..3e2a78b6 100755
--- a/tests/templates/kuttl/smoke/test-regorule.py
+++ b/tests/templates/kuttl/smoke/test-regorule.py
@@ -27,11 +27,19 @@
     # --> {'hello': True}
 
     # url = 'http://test-opa-svc:8081/v1/data/test'
-    response = requests.post(args['url']).json()
+    response = requests.post(args["url"], json={"input": {}}).json()
 
-    if "result" in response and "hello" in response["result"] and response["result"]["hello"]:
+    if (
+        "result" in response
+        and "hello" in response["result"]
+        and response["result"]["hello"]
+    ):
         print("Test successful!")
         exit(0)
     else:
-        print("Error: received " + str(response) + " - expected: {'result': {'hello': True}}")
+        print(
+            "Error: received "
+            + str(response)
+            + " - expected: {'result': {'hello': True}}"
+        )
         exit(-1)
diff --git a/tests/test-definition.yaml b/tests/test-definition.yaml
index 0ec62395..aa2bdfe0 100644
--- a/tests/test-definition.yaml
+++ b/tests/test-definition.yaml
@@ -3,12 +3,14 @@ dimensions:
   - name: opa
     values:
       # To use a custom image, add a comma and the full name after the product version
-      - 0.67.1,docker.stackable.tech/stackable/opa:0.67.1-stackable0.0.0-dev
-      - 0.66.0,docker.stackable.tech/stackable/opa:0.66.0-stackable0.0.0-dev
+      # 0.67.1,docker.stackable.tech/stackable/opa:0.67.1-stackable0.0.0-dev
+      - 0.67.1
+      - 1.0.0
   - name: opa-latest
     values:
       # To use a custom image, add a comma and the full name after the product version
-      - 0.67.1,docker.stackable.tech/stackable/opa:0.67.1-stackable0.0.0-dev
+      # 0.67.1,docker.stackable.tech/stackable/opa:0.67.1-stackable0.0.0-dev
+      - 1.0.0
   - name: keycloak
     values:
       - 23.0.1