diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e10b8b981..d0c609165 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -97,7 +97,7 @@ black:
   variables:
     GIT_STRATEGY: fetch
   before_script:
-    - pip install black
+    - pip install black==19.10b0
   script:
     - black --check --diff api/