diff --git a/.travis.yml b/.travis.yml
index 1e27bdb9..ab0dcd5c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,5 +6,5 @@ git:
 branches:
   only:
     - gh-pages
-install: yarn install
+install: yarn install --frozen-lockfile
 script: yarn test