diff --git a/action.yml b/action.yml
index b4d131b..4d5f36c 100644
--- a/action.yml
+++ b/action.yml
@@ -20,7 +20,7 @@ inputs:
 runs:
   using: composite
   steps:
-    - uses: sigstore/cosign-installer@9614fae9e5c5eddabb09f90a270fcb487c9f7149 # v3.3.0
+    - uses: sigstore/cosign-installer@e1523de7571e31dbe865fd2e80c5c7c23ae71eb4 # v3.4.0
     - run: |
         cd $GITHUB_ACTION_PATH \
         && ./ct.sh \