diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8921f4d..8a379ed 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,11 @@
 This document contains details of the various releases and their release dates.
 Dates are in the format `yyyy-mm-dd`.
 
+## 2.13 - 2018-01-05
+
+Leading and trailing whitespace is now removed from CSS selectors. See
+<https://gitlab.com/yorickpeterse/oga/merge_requests/183> for more information.
+
 ## 2.12 - 2017-12-29
 
 Element start tags containing other start tags (e.g. `<script<script>`) are now
diff --git a/checksum/oga-2.13-java.gem.sha512 b/checksum/oga-2.13-java.gem.sha512
new file mode 100644
index 0000000..07404d1
--- /dev/null
+++ b/checksum/oga-2.13-java.gem.sha512
@@ -0,0 +1 @@
+a5492d3bfb21fad9060412e4189b2f08c179840eae5bacee2580795e5ce6bf9aa10d7e95c1e7729259c708f25051cf4df7d48261a05fbda8c39c5879656135c9
\ No newline at end of file
diff --git a/checksum/oga-2.13.gem.sha512 b/checksum/oga-2.13.gem.sha512
new file mode 100644
index 0000000..4745971
--- /dev/null
+++ b/checksum/oga-2.13.gem.sha512
@@ -0,0 +1 @@
+5acda689eff5c8f6ac03f97189f9906305576ab213276f317e5136476751905a0748be7058eca808d80bbdbe50475024c40400c135946c56fd2e0b958a8b4037
\ No newline at end of file
diff --git a/lib/oga/version.rb b/lib/oga/version.rb
index e9a5472..a66a280 100644
--- a/lib/oga/version.rb
+++ b/lib/oga/version.rb
@@ -1,3 +1,3 @@
 module Oga
-  VERSION = '2.12'
+  VERSION = '2.13'
 end # Oga