diff --git a/.travis.yml b/.travis.yml
index 931e648..6f4f906 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,8 +1,8 @@
 rvm:
   - 2.0.0
   - 2.1.10
-  - 2.2.5
-  - 2.3.1
+  - 2.2.6
+  - 2.3.3
 gemfile:
   - gemfiles/Gemfile-activemodel-3.0.x
   - gemfiles/Gemfile-activemodel-3.1.x
@@ -13,8 +13,6 @@ gemfile:
   - gemfiles/Gemfile-activemodel-5.0.x
 matrix:
   exclude:
-    - rvm: 1.9.3
-      gemfile: gemfiles/Gemfile-activemodel-5.0.x
     - rvm: 2.0.0
       gemfile: gemfiles/Gemfile-activemodel-5.0.x
     - rvm: 2.1.10