diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 228b6b6..583c737 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,3 +1,4 @@
+---
 # This file is a template, and might need editing before it works on your project.
 # see https://docs.gitlab.com/ce/ci/yaml/README.html for all available options
 
@@ -10,9 +11,9 @@ shellcheck:
     - shellcheck --version
   script:
     - echo "--------- CHECKING POSIX SHELLSCRIPTS -------------"
-    - find . -type f -name '*.sh' | xargs shellcheck
+    - find . -type f -name '*.sh' | xargs shellcheck -s sh
     - echo "--------- CHECKING ZSH SHELLSCRIPTS -------------"
-    - find . -type f -name '*.zsh' | xargs shellcheck
+    - find . -type f -name '*.zsh' | xargs shellcheck -s bash
 
 shfmt:
   stage: test