diff --git a/action.yml b/action.yml
index 5272709..bc0b342 100644
--- a/action.yml
+++ b/action.yml
@@ -27,17 +27,18 @@ runs:
     uses: sigstore/cosign-installer@v3.5.0
 
   - name: Sign image with a key
+    env:
+      TAGS: ${{ inputs.image-tags }}
+      COSIGN_PRIVATE_KEY: ${{ inputs.cosign-private-key }}
+      COSIGN_PASSWORD: ${{ inputs.cosign-password }}
+      DIGEST: ${{ inputs.image-digest }}
     run: |
       images=""
       for tag in ${TAGS}; do
         images+="${tag}@${DIGEST} "
       done
       cosign sign --yes --key env://COSIGN_PRIVATE_KEY ${images}
-    env:
-      TAGS: ${{ inputs.image-tags }}
-      COSIGN_PRIVATE_KEY: ${{ inputs.cosign-private-key }}
-      COSIGN_PASSWORD: ${{ inputs.cosign-password }}
-      DIGEST: ${{ inputs.image-digest }}
+    shell: bash
 
   - name: Sign the images with GitHub OIDC Token
     env:
@@ -49,3 +50,4 @@ runs:
         images+="${tag}@${DIGEST} "
       done
       cosign sign --yes ${images}
+    shell: bash