diff --git a/.travis.yml b/.travis.yml
index 2789a241..5cc86683 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,7 +18,6 @@ env: JRUBY_OPTS="$JRUBY_OPTS --debug"
 rvm:
   # Include JRuby first because it takes the longest
   - jruby-9.2.5.0
-  - 2.3
   - 2.4
   - 2.5
   - 2.6
diff --git a/CHANGES.md b/CHANGES.md
index e53302c5..8720cfe4 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -22,6 +22,10 @@
   Provide initiating `HTTP::Request` object on `HTTP::Response`.
   ([@joshuaflanagan])
 
+* [#571](https://github.com/httprb/http/pull/571)
+  Drop Ruby 2.3.x support.
+  ([@ixti])
+
 
 ## 4.1.1 (2019-03-12)
 
diff --git a/README.md b/README.md
index 8e74f668..206cfe65 100644
--- a/README.md
+++ b/README.md
@@ -164,7 +164,6 @@ and call `#readpartial` on it repeatedly until it returns `nil`:
 This library aims to support and is [tested against][travis] the following Ruby
 versions:
 
-* Ruby 2.3.x
 * Ruby 2.4.x
 * Ruby 2.5.x
 * Ruby 2.6.x