diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 401fb59..b893aed 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -16,7 +16,7 @@ cov:
   script:
   - cargo build
   - cargo kcov
-  - COVERAGE=$(grep -Po 'covered":.*?[^\\]"' target/cov/index.json | grep "[0-9]*\.[0-9]" -o)
+  - COVERAGE=$(grep -Po 'covered":.*?[^\\]"' target/cov/index.js | grep "[0-9]*\.[0-9]" -o)
   - echo "Coverage:" $COVERAGE
   - mv target/cov public/
   artifacts: