diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b1b1092..decdeb7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,19 +14,26 @@ jobs:
     - uses: actions/setup-go@v5
       with:
         go-version: '1.25'
-    - uses: arduino/setup-protoc@v2
-      with:
-        protoc-version: '6.32.0'
+    - name: Install protoc v6.32.0
+      run: |
+        curl -LO https://github.com/protocolbuffers/protobuf/releases/download/v32.0/protoc-32.0-linux-x86_64.zip
+        sudo unzip -o protoc-32.0-linux-x86_64.zip -d /usr/local bin/protoc
+        sudo unzip -o protoc-32.0-linux-x86_64.zip -d /usr/local 'include/*'
+        rm protoc-32.0-linux-x86_64.zip
 
     - name: Install Go dependencies
       run: |
         go install google.golang.org/protobuf/cmd/protoc-gen-go@v1.36.8
         go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@v1.2
+
     - name: Generate protobuf code
       run: make generate
 
     - name: Verify generated code is up-to-date
       run: |
+        echo "--- Diff after make generate in CI (should be empty for success) ---"
+        git diff zerfoo.pb.go
+        echo "--- End of post-generate diagnostics ---"
         if ! git diff --exit-code; then
           echo "Generated code is not up-to-date. Please run 'make generate' and commit the changes."
           exit 1
diff --git a/zerfoo.pb.go b/zerfoo.pb.go
index b72a4e7..7206e1e 100644
--- a/zerfoo.pb.go
+++ b/zerfoo.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.36.6
+// 	protoc-gen-go v1.36.8
 // 	protoc        v6.32.0
 // source: zerfoo.proto