diff --git a/.ruby-version b/.ruby-version
index 2bf1c1c..0bee604 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.3.1
+2.3.3
diff --git a/.travis.yml b/.travis.yml
index 3f61465..180438c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,11 +8,11 @@ before_install:
 
 
 rvm:
-  - 1.9.3
   - 2.0
   - 2.1
   - 2.2
-  - 2.3.1
+  - 2.3.3
+  - 2.4.0
   - jruby-19mode
   - rbx-19mode
   - ruby-head