diff --git a/CHANGELOG.md b/CHANGELOG.md
index dc7bebac..10132d8e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,11 @@
 # Unreleased
 
+# v0.20.0
+
 * Ensure Active Record Trilogy adapter handles AdapterTimeout and ConnectionFailed exceptions. (#497)
 * Allow passing --with-openssl-dir for a custom OpenSSL installation. (#499)
+* Use ActiveRecord::ConnectionNotEstablished as base error for TrilogyAdapter. (#496)
+* Fix Mysql2 connection error regular expressions. (#506)
 
 # v0.19.1
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 4306ef70..9d886e7c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -18,7 +18,7 @@ GIT
 PATH
   remote: .
   specs:
-    semian (0.19.1)
+    semian (0.20.0)
 
 GEM
   remote: https://rubygems.org/
diff --git a/lib/semian/version.rb b/lib/semian/version.rb
index 95570a73..abba34c6 100644
--- a/lib/semian/version.rb
+++ b/lib/semian/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Semian
-  VERSION = "0.19.1"
+  VERSION = "0.20.0"
 end