diff --git a/.github/workflows/ci-test-jit.yaml b/.github/workflows/ci-test-jit.yaml
index 467be5f69f..64e4254c21 100644
--- a/.github/workflows/ci-test-jit.yaml
+++ b/.github/workflows/ci-test-jit.yaml
@@ -77,7 +77,7 @@ jobs:
           key: jit-test-results.dist-exe_${{ hashFiles(env.jit_dist_rel_exe) }}.tests_${{ env.runtime_tests_causalhash }}.yaml_${{ hashFiles('**/ci-test-jit.yaml') }}
 
       - name: install libb2 (linux)
-        uses: awalsh128/cache-apt-pkgs-action@latest
+        uses: awalsh128/cache-apt-pkgs-action@5902b33ae29014e6ca012c5d8025d4346556bd40 #v1.4.3
         if: runner.os == 'Linux' && steps.cache-jit-test-results.outputs.cache-hit != 'true'
         with:
           packages: libb2-1