diff --git a/CHANGELOG.md b/CHANGELOG.md
index 945a146..210287c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,12 @@
 This document contains details of the various releases and their release dates.
 Dates are in the format `yyyy-mm-dd`.
 
+## 3.0 - 2019-12-03
+
+This release bumps the Ruby version requirement to Ruby 2.3.0, as we haven't
+supported older versions for several years now. We also no longer officially
+support Rubinius.
+
 ## 2.17 - 2019-12-02
 
 Elements using the default XML namespace can now be queried using XPath queries,
diff --git a/checksum/oga-3.0-java.gem.sha512 b/checksum/oga-3.0-java.gem.sha512
new file mode 100644
index 0000000..2011a64
--- /dev/null
+++ b/checksum/oga-3.0-java.gem.sha512
@@ -0,0 +1 @@
+b64906a38edefb346c2ba9770336cb69f424e0776690932fea524f014dda00d8fe1b13b69fff1f01ca75c8f5107b92056c25f8ae7ee4aeb83770dc03b5d482c0
\ No newline at end of file
diff --git a/checksum/oga-3.0.gem.sha512 b/checksum/oga-3.0.gem.sha512
new file mode 100644
index 0000000..0c97d84
--- /dev/null
+++ b/checksum/oga-3.0.gem.sha512
@@ -0,0 +1 @@
+56eea6f76968afb2916e73d729a9c94dcacfb1cccc6fa0ef27888e6e8006a80cda9279db4b040be81b33ee354916e49e437ce0189ce79bdbab7c0f54203b9f2e
\ No newline at end of file
diff --git a/lib/oga/version.rb b/lib/oga/version.rb
index c17a97b..9e38ec0 100644
--- a/lib/oga/version.rb
+++ b/lib/oga/version.rb
@@ -1,3 +1,3 @@
 module Oga
-  VERSION = '2.17'
+  VERSION = '3.0'
 end # Oga