diff --git a/CHANGELOG.md b/CHANGELOG.md
index 53e43ba080..6e798a3776 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+10-10-2020 6.4.178
+- ActiveSync: Invalid date string in message source caused sync loop
+
 09-10-2020 6.4.177
 - Core: Custom fields error in old framework
 
diff --git a/www/version.php b/www/version.php
index 82f1b2bfba..2305f59202 100644
--- a/www/version.php
+++ b/www/version.php
@@ -1,2 +1,2 @@
 <?php
-return "6.4.177";
+return "6.4.178";