diff --git a/scripts/build_gdk_image b/scripts/build_gdk_image
index 58b1ef6fd05c07f60e7d69f4316c6bdf1efc5ef9..77b90dbf1ecf7182e3795e6048a9366408f26094 100755
--- a/scripts/build_gdk_image
+++ b/scripts/build_gdk_image
@@ -7,7 +7,7 @@ source "$(dirname "$0")/utils.sh"
 REGISTRY="${CI_REGISTRY}/${CI_PROJECT_PATH}"
 SHA_TAG="${CI_COMMIT_SHA}"
 BRANCH_TAG="${CI_COMMIT_REF_SLUG}"
-STABLE_BRANCH_PATTERN="^[\d-]+-stable-ee$"
+STABLE_BRANCH_PATTERN="^[0-9-]+-stable-ee$"
 
 IMAGE="${REGISTRY}/gitlab-qa-gdk"