diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 3927de3c7d..b2ca57e13a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -213,7 +213,7 @@ jobs:
     runs-on: ubuntu-latest
     services:
       postgres:
-        image: tensorchord/pgvecto-rs:pg14-v0.1.11
+        image: tensorchord/pgvecto-rs:pg14-v0.1.11@sha256:0335a1a22f8c5dd1b697f14f079934f5152eaaa216c09b61e293be285491f8ee
         env:
           POSTGRES_PASSWORD: postgres
           POSTGRES_USER: postgres