diff --git a/ci_cd/.gitlab-ci.yml b/ci_cd/.gitlab-ci.yml
index dfe74e59e5aa451d25f33fe007dd36f23bb6a14c..94bb1306595ad373a076acdb9aa55db368b86ff8 100644
--- a/ci_cd/.gitlab-ci.yml
+++ b/ci_cd/.gitlab-ci.yml
@@ -1,7 +1,7 @@
 stages:
-  problem2
-  problem3
-  problem4
+  - problem2
+  - problem3
+  - problem4
 
 include:
   - local: 'ci_cd/problem2.yml'   # hw3, problem 1