diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index bcec9bc7f54cf9db43efcadfb731425baa6ef1f5..0e60069edefc18f8ee024bf124b0c0bba16ae9f3 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -12,7 +12,7 @@ build:
   #   - apt update && apt -y install make autoconf
 
   script:
-    - source /data/sleipnir/opt/root/6-08.00-M2-SL7-64-gcc6.1.0/bin/thisroot.csh
+    - source /data/sleipnir/opt/root/6-08.00-M2-SL7-64-gcc6.1.0/bin/thisroot.sh
     - mkdir build
     - cd build
     - cmake3 ..