diff --git a/.travis.yml b/.travis.yml
index c8a0e29..1636fc0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -23,7 +23,7 @@ jobs:
     - name: "Static analysis"
       script:
         - yarn lint
-        - yarn prettier --check --ignore-unknown *
+        - yarn prettier --check --ignore-unknown "*"
     - name: "Build demo site"
       script:
         - yarn demo:build