diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 2c38ef4b..9cbc0094 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -8,7 +8,7 @@ variables:
   RUSTFLAGS: ""
   CARGOFLAGS: ""
 cache:
-  key: "$CI_BUILD_STAGE/$CI_BUILD_REF_NAME"
+  key: "$CI_BUILD_STAGE-$CI_BUILD_REF_NAME"
   untracked: true
 linux-stable-test:
   stage: test