diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e0a74039dbe947ea540cc3ef365a52af6067a633..32002bacb7846121a5b2ac8825a261cf5d1e5b44 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -41,6 +41,13 @@ build:
   script:
     - poetry build
 
+isort:
+  extends:
+    - .code_changes
+  stage: checks
+  script:
+    - isort --check duniterpy tests examples
+
 type:
   extends:
     - .code_changes