diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3931ca9f8..d75b00f40 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -65,7 +65,7 @@ jobs:
   pqc-rest:
     if: ${{ github.repository == 'googleapis/gapic-generator-ruby' }}
     runs-on: ubuntu-latest
-    container: ruby:3.4-trixie@sha256:2547cdb5a1345b26a01f6c605f0cd0754ee66f041df5c8b6cbdf717e2f5a8d9e
+    container: ruby:3.4-trixie@sha256:5f88ef868883578c64ea2f33d8e6e09ea4b882ca416ff7874df323ebf0caaec1
     env:
       SHOWCASE_REQUIRE_REST_PQC: "1"
     steps: