diff --git a/CHANGELOG.md b/CHANGELOG.md
index a4a3faa..7b897a6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,7 +3,7 @@
 This document contains details of the various releases and their release dates.
 Dates are in the format `yyyy-mm-dd`.
 
-## 2.4 - Unreleased
+## 2.4 - 2016-09-04
 
 ### Serialising Large Documents
 
@@ -11,8 +11,18 @@ Oga can now serialise large documents without causing the call stack to overflow
 thanks to the new `Oga::XML::Generator` class. This class can generate XML
 without using a stack at all.
 
-See issue <https://github.com/YorickPeterse/oga/issues/158> for more
-information.
+See issue <https://github.com/YorickPeterse/oga/issues/158> and commit
+dd138981f68a606eff5d5a01e990f04398087dc4 for more information.
+
+### Faster retrieval of previous/next nodes
+
+The methods `Oga::XML::Node#previous` and `Oga::XML::Node#next` now simply
+return the value of an instance variable instead of calculating the
+previous/next node on the fly. This greatly improves the performance of these
+methods at the cost of a bit of extra work when adding or removing nodes from a
+NodeSet.
+
+See commit 5a58b1413767fed4518e8a67c4eb432a31592660 for more information.
 
 ## 2.3 - 2016-07-13
 
diff --git a/checksum/oga-2.4-java.gem.sha512 b/checksum/oga-2.4-java.gem.sha512
new file mode 100644
index 0000000..30a52c9
--- /dev/null
+++ b/checksum/oga-2.4-java.gem.sha512
@@ -0,0 +1 @@
+723d87b4c8cecdf3f0edfbac5e72411f5abea90d90a3a2269e24823424251da1a2378399c17ab69e0eb28957731b3c7f075026caccb71ce8907505baebeea0f4
\ No newline at end of file
diff --git a/checksum/oga-2.4.gem.sha512 b/checksum/oga-2.4.gem.sha512
new file mode 100644
index 0000000..90281e9
--- /dev/null
+++ b/checksum/oga-2.4.gem.sha512
@@ -0,0 +1 @@
+d8ff0a1d96b217f09d010173dd97b0036692098ebe5c33385618c2fd542e63c01a3990f9a74beea139c49f8ee3692427899748125249469c19633fae38b9beb3
\ No newline at end of file
diff --git a/lib/oga/version.rb b/lib/oga/version.rb
index b6f67cb..d38ed1e 100644
--- a/lib/oga/version.rb
+++ b/lib/oga/version.rb
@@ -1,3 +1,3 @@
 module Oga
-  VERSION = '2.3'
+  VERSION = '2.4'
 end # Oga