diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index bda86b1..57b1562 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -57,8 +57,26 @@ jobs:
           fi
         done
 
+  type-generation:
+    name: type generation
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Generate types
+        run: |
+          make generate
+
+      - name: Ensure generated types are up-to-date
+        run: |
+          if ! git diff --quiet; then
+            echo "generated types are out of date!"
+            echo "run 'make generate' to regenerate type definitions"
+            exit 1
+          fi
+
   license-check:
-    name: License check
+    name: license check
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
@@ -106,7 +124,7 @@ jobs:
 
   release:
     runs-on: ubuntu-latest
-    needs: [test, lint, examples, license-check]
+    needs: [test, lint, examples, license-check, type-generation]
     if: startsWith(github.ref, 'refs/tags/')
     env:
       DOCKER_CLI_EXPERIMENTAL: "enabled"
diff --git a/pkg/migrations/types.go b/pkg/migrations/types.go
index 106d45a..4d4214e 100644
--- a/pkg/migrations/types.go
+++ b/pkg/migrations/types.go
@@ -192,9 +192,13 @@ type PgRollMigration struct {
 	Name string `json:"name"`
 
 	// Operations corresponds to the JSON schema field "operations".
-	Operations []interface{} `json:"operations"`
+	Operations PgRollOperations `json:"operations"`
 }
 
+type PgRollOperation interface{}
+
+type PgRollOperations []interface{}
+
 // Replica identity definition
 type ReplicaIdentity struct {
 	// Name of the index to use as replica identity