diff --git a/encrypt/action.yaml b/encrypt/action.yaml
index f67b42a..1a7b8e3 100644
--- a/encrypt/action.yaml
+++ b/encrypt/action.yaml
@@ -71,7 +71,7 @@ runs:
         fi
         echo "output-file=${OUTPUT_FILE}" >>"${GITHUB_OUTPUT}"
 
-        ${{ inputs.input-command || format('cat "{1}"', inputs.input-file) }} | \
+        ${{ inputs.input-command || format('cat "{0}"', inputs.input-file) }} | \
           gpg \
             --batch \
             --encrypt \