diff --git a/Makefile b/Makefile
index 6fb5ef5..084ad69 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,3 @@
 release:
-	git tag -a v$(date "+%Y%m%d%H%M%S")
+	git tag -a v$(shell date "+%Y%m%d%H%M%S")
 	git push --tags