diff --git a/.travis.yml b/.travis.yml
index e0a9a2c..6fb4985 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,7 +20,7 @@ gemfile:
   - test/gemfiles/mongoid5.gemfile
   - test/gemfiles/mongoid6.gemfile
 env:
-  - ELASTICSEARCH_VERSION=5.4.0
+  - ELASTICSEARCH_VERSION=5.5.0
 jdk: oraclejdk8
 matrix:
   include:
--
libgit2 0.21.0