diff --git a/.travis.yml b/.travis.yml
index 13180cf..193e518 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,6 +10,8 @@ env:
   - LIBWEBP_VERSION="0.4.2"
   - LIBWEBP_VERSION="0.4.3"
   - LIBWEBP_VERSION="0.5.0"
+  - LIBWEBP_VERSION="0.5.1"
+
 
 cache:
   directories: