diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 5a719682007f67ea22e3fdc3866579a1090c0e66..6f5cad7b7590e74e58ad4c9077a7e478a4c1833c 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -23,7 +23,7 @@ build:release:
 build:beta:
   extends: .build
   variables:
-    BETA_BUILD: yes
+    BETA_BUILD: "yes"
   only:
     - beta