diff --git a/magic_spoiler/__main__.py b/magic_spoiler/__main__.py
index 5da6985f..76153c58 100644
--- a/magic_spoiler/__main__.py
+++ b/magic_spoiler/__main__.py
@@ -645,7 +645,7 @@ def main() -> None:
     changed |= delete_old_files()
 
     # Set output to deploy
-    if os.environ('CI'):
+    if os.environ['CI']:
         if changed:
             print("::set-output name=deploy::true")
             print("::notice title=Updates available::New spoiler files will be uploaded")