diff --git a/.forgejo/workflows/workflow.yaml b/.forgejo/workflows/workflow.yaml
index 288d1be..7bda2cb 100644
--- a/.forgejo/workflows/workflow.yaml
+++ b/.forgejo/workflows/workflow.yaml
@@ -7,7 +7,7 @@ jobs:
   lint:
     name: Lint Code (Ruff & Pylint)
     runs-on: docker
-    container: www.coastalcommits.com/cswimr/actions:uv
+    container: www.coastalcommits.com/cswimr/actions:uv@sha256:cd06ff5bd5b5883cdd5bb7c7f177957b402dafc25658bf06c3e464247d7bc8ef
     steps:
       - name: Checkout
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
@@ -29,7 +29,7 @@ jobs:
     name: Build Documentation (MkDocs)
     if: github.event_name == 'push' && github.ref == 'refs/heads/main'
     runs-on: docker
-    container: www.coastalcommits.com/cswimr/actions:docs
+    container: www.coastalcommits.com/cswimr/actions:docs@sha256:187a6986dba977a73a20ae30a89ceeba3d053e55b659dcc0ae7bab917571460d
     steps:
       - name: Checkout
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4