diff --git a/ci_cd/labm1.yml b/ci_cd/labm1.yml
index 1a949618e947ce332ca53c3e692c9440c2d35508..139c198b3d18640e71484442df2802ce1114e621 100644
--- a/ci_cd/labm1.yml
+++ b/ci_cd/labm1.yml
@@ -3,9 +3,9 @@ stages:
 
 .only_run_if_lab0_available: &common_rules
   rules:
-    exists:
+    - exists:
       - lab-1.cpp
-    changes:
+    - changes:
       - lab-1.cpp
 
 ### Lab -1