diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6e133e7a21d59825829ea48c2a26c8735a0e153c..ea552eaddd015b4be9b84d64017120c638199b91 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -75,7 +75,7 @@ jobs:
       - uses: bufbuild/buf-breaking-action@v1
         with:
           input: "crates/proto/proto/"
-          against: "https://github.com/${GITHUB_REPOSITORY}.git#branch=${BUF_BASE_BRANCH},subdir=crates/rpc/proto/"
+          against: "https://github.com/${GITHUB_REPOSITORY}.git#branch=${BUF_BASE_BRANCH},subdir=crates/proto/proto/"
 
   macos_tests:
     timeout-minutes: 60