diff --git a/CHANGELOG.md b/CHANGELOG.md
index 273baec..2dddce4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,13 @@
 ChangeLog
 =========
 
+5.1.6 (2022-07-15)
+------------------
+
+* #187 Allow testSendToGetLargeContent peak memory usage to be specified externally (@phil-davis)
+* #188 Fix various small typos and grammar (@phil-davis)
+* #189 Fix typo in text of status code 203 'Non-Authoritative Information' (@phil-davis)
+
 5.1.5 (2022-07-09)
 ------------------
 
diff --git a/lib/Version.php b/lib/Version.php
index f0c8317..47582f2 100644
--- a/lib/Version.php
+++ b/lib/Version.php
@@ -16,5 +16,5 @@ class Version
     /**
      * Full version number.
      */
-    const VERSION = '5.1.5';
+    const VERSION = '5.1.6';
 }