diff --git a/.travis.yml b/.travis.yml
index b09ff993..cf57c175 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,15 +2,9 @@ language: ruby
 
 matrix:
   include:
-  - rvm: 2.3.0
-    env:
-      - LABEL=unit_tests
   - rvm: 2.4.1
     env:
       - LABEL=unit_tests
-  - rvm: 2.3.6
-    env:
-      - LABEL=unit_tests
   - rvm: 2.4.3
     env:
       - LABEL=unit_tests