diff --git a/.travis.yml b/.travis.yml
index 16bef07d..a7080731 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -92,4 +92,4 @@ cache:
   timeout: 604800
 before_cache:
   - sudo rm -rf .docker-tmp/build-root
-  - sudo chmod o+rw .docker-tmp
+  - sudo chmod -R o+rw .docker-tmp