diff --git a/.ci/Jenkinsfile b/.ci/Jenkinsfile
index 6abab5abea..e0d4c6d9d5 100644
--- a/.ci/Jenkinsfile
+++ b/.ci/Jenkinsfile
@@ -98,7 +98,7 @@ pipeline {
             githubCheckNotify('PENDING')  // we want to notify the upstream about the e2e the soonest
             stash allowEmpty: true, name: 'source', useDefaultExcludes: false
             setEnvVar("GO_VERSION", readFile("${env.WORKSPACE}/${env.BASE_DIR}/.go-version").trim())
-            setEnvVar("LABELS_STRING", "buildURL=${env.BUILD_URL} gitSha=${env.GIT_BASE_COMMIT} build=${env.BUILD_ID} repo=${env.REPO} branch=${env.BRANCH_NAME.toLowerCase()} type=ci")
+            setEnvVar("LABELS_STRING", "buildURL=${env.BUILD_URL} gitSha=${env.GIT_BASE_COMMIT} build=${env.BUILD_ID} repo=${env.REPO} branch=${env.BRANCH_NAME.toLowerCase().replaceAll('[^a-z0-9-]', '-')} type=ci")
             checkSkipTests()
           }
         }