diff --git a/.github/workflows/presubmit.yml b/.github/workflows/presubmit.yml
index ef6b274f..f0fd7f01 100644
--- a/.github/workflows/presubmit.yml
+++ b/.github/workflows/presubmit.yml
@@ -14,8 +14,10 @@ jobs:
   build:
     name: Build spec artifacts
     runs-on: ubuntu-latest
-    # needs: checkout
-    container: khronosgroup/docker-images@sha256:bd30a83285a2ea062598f053b5bd8ebc843e16c639c0e4cd88ab4bbb4e63ead3
+    # Refer to the build container by its SHA instead of the name, to prevent
+    # caching problems when updating the image.
+    # container: khronosgroup/docker-images:asciidoctor-spec.20240701
+    container: khronosgroup/docker-images@sha256:1175e55feeaca36d8c53b3628372cd371078473a162a558c3e89ffafdde40676
 
     steps:
       - uses: actions/checkout@v4