diff --git a/CHANGELOG.md b/CHANGELOG.md
index f9640308..eaaa16b1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,27 @@
 # Changelog
 
+# 3.20.0
+
+  * Optimised EmHttpRequestAdapter performance.
+
+    Thanks to [Ricardo Trindade](https://github.com/RicardoTrindade)
+
+  * Removed runtime dependency on base64.
+
+    Thanks to [Earlopain](https://github.com/Earlopain)
+
+  * Typhoeus::Response objects constructed from stubbed responses now have all timing attributes set to 0.0.
+
+    Thanks to [James Brown](https://github.com/Roguelazer)
+
+  * Optimised WebMock::Util::Headers by removing redundant freeze invocations.
+
+    Thanks to [Kazuhiro NISHIYAMA](https://github.com/znz)
+
+  * The default stubbed response body, which is an empty String, is unfrozen.
+
+  * When building signatures of requests made by http.rb, the request body encoding is now preserved.
+
 # 3.19.1
 
   * When passing a Proc or lambda as response body to `to_return_json`, the body is evaluated at the time of request and not at the time of `to_return_json` method invocation.
diff --git a/README.md b/README.md
index 7e816215..3aefba34 100644
--- a/README.md
+++ b/README.md
@@ -1189,6 +1189,10 @@ People who submitted patches and new features or suggested improvements. Many th
 * Yuki Inoue
 * Brandon Weaver
 * Josh Nichols
+* Ricardo Trindade
+* Earlopain
+* James Brown
+* Kazuhiro NISHIYAMA
 
 For a full list of contributors you can visit the
 [contributors](https://github.com/bblimke/webmock/contributors) page.
diff --git a/lib/webmock/version.rb b/lib/webmock/version.rb
index 641148ac..47fc2d77 100644
--- a/lib/webmock/version.rb
+++ b/lib/webmock/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module WebMock
-  VERSION = '3.19.1' unless defined?(::WebMock::VERSION)
+  VERSION = '3.20.0' unless defined?(::WebMock::VERSION)
 end