diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index fa53c42..1c618ac 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -3,7 +3,7 @@ on: [ workflow_dispatch, push, pull_request ]
 
 jobs:
     build:
-        if: !contains(github.event.head_commit.message, '[skip]')
+        if: "!contains(github.event.head_commit.message, '[skip]')"
         runs-on: ubuntu-20.04
         steps:
             -   name: checkout