diff --git a/.travis.yml b/.travis.yml
index 9cd9971..195a8a6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,11 +6,9 @@ go:
   - 1.8
   - tip
 env:
-  - LIBWEBP_VERSION="0.4.1"
-  - LIBWEBP_VERSION="0.4.2"
-  - LIBWEBP_VERSION="0.4.3"
   - LIBWEBP_VERSION="0.5.0"
   - LIBWEBP_VERSION="0.5.1"
+  - LIBWEBP_VERSION="1.1.0"
 
 
 cache:
diff --git a/README.md b/README.md
index eaafe5f..0ab44fd 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ A implementation of Go binding for [libwebp](https://developers.google.com/speed
 
 ## Dependencies
 
-- libwebp 0.4, 0.5+, compiled with `--enable-libwebpmux`
+- libwebp 0.5+, compiled with `--enable-libwebpmux`
 
 ## Usage