diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 2b6720e..07b01ea 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -48,4 +48,4 @@ jobs:
           platforms: linux/386,linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64,linux/ppc64le,linux/s390x
           push: true
           tags: |
-            join(['willfarrell/crontab', env.tag], ':')
\ No newline at end of file
+            ${{ join(['willfarrell/crontab', env.tag], ':') }}
\ No newline at end of file