diff --git a/.github/workflows/linter.yml b/.github/workflows/linter.yml
index 512d5df6..332f9978 100644
--- a/.github/workflows/linter.yml
+++ b/.github/workflows/linter.yml
@@ -32,5 +32,16 @@ jobs:
       with:
         go-version: ${{ env.GO_VERSION }}
 
+    - name: Install buf
+      uses: bufbuild/buf-setup-action@v1.31.0
+      with:
+        github_token: ${{ github.token }}
+
     - name: Run Lint
       run: ./scripts/lint.sh --go-lint
+
+    - name: Ensure protobuf changes are checked in
+      run: |
+        scripts/protobuf_codegen.sh
+        git diff-index HEAD # to show the differences
+        git diff-index --quiet HEAD || (echo 'protobuf generated code changes have not all been checked in' && exit 1)
diff --git a/scripts/lint.sh b/scripts/lint.sh
index 49a2282a..7321e833 100755
--- a/scripts/lint.sh
+++ b/scripts/lint.sh
@@ -15,3 +15,5 @@ source $RELAYER_PATH/scripts/versions.sh
 
 go install -v github.com/golangci/golangci-lint/cmd/golangci-lint@${GOLANGCI_LINT_VERSION}
 golangci-lint run --config=$RELAYER_PATH/.golangci.yml --build-tags=testing ./... --timeout 5m
+
+(cd proto && buf lint)