diff --git a/.travis.yml b/.travis.yml
index 0f1ee4a..32904b3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,7 +5,6 @@ os:
   - osx
 dist: trusty
 rvm:
-  - 2.1
   - 2.2
   - 2.3
   - 2.4
diff --git a/appveyor.yml b/appveyor.yml
index 39c5119..9e86496 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -2,8 +2,6 @@ version: 1.0.{build}-{branch}
 
 environment:
   matrix:
-    - RUBY_VERSION: '21'
-    - RUBY_VERSION: '21-x64'
     - RUBY_VERSION: '22'
     - RUBY_VERSION: '22-x64'
     - RUBY_VERSION: '23'