diff --git a/.travis.yml b/.travis.yml
index b86f4b4970..46a66a6058 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,9 +6,6 @@ notifications:
   email:
   - mail@zzak.io
 rvm:
-  - 1.9.3
-  - 2.0.0
-  - 2.1.10
   - 2.2.7
   - 2.3.4
   - 2.4.1
diff --git a/appveyor.yml b/appveyor.yml
index d33b8c9c71..5ec4b4e915 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -10,11 +10,6 @@ deploy: off
 environment:
   NOBENCHMARK: 1
   matrix:
-    - ruby_version: "193"
-    - ruby_version: "200"
-    - ruby_version: "200-x64"
-    - ruby_version: "21"
-    - ruby_version: "21-x64"
     - ruby_version: "22"
     - ruby_version: "22-x64"
     - ruby_version: "23"
diff --git a/rdoc.gemspec b/rdoc.gemspec
index e605560868..4a7ddce0da 100644
--- a/rdoc.gemspec
+++ b/rdoc.gemspec
@@ -46,7 +46,7 @@ RDoc includes the +rdoc+ and +ri+ tools for generating and displaying documentat
     TODO.rdoc
   ]
 
-  s.required_ruby_version = Gem::Requirement.new(">= 1.9.3")
+  s.required_ruby_version = Gem::Requirement.new(">= 2.2.2")
   s.rubygems_version = "2.5.2"
   s.required_rubygems_version = Gem::Requirement.new(">= 2.2")