diff --git a/00-RELEASENOTES b/00-RELEASENOTES
index 8fa3f4c6..f6fb1d2d 100644
--- a/00-RELEASENOTES
+++ b/00-RELEASENOTES
@@ -10,6 +10,17 @@ HIGH:     There is a critical bug that may affect a subset of users. Upgrade!
 CRITICAL: There is a critical bug affecting MOST USERS. Upgrade ASAP.
 --------------------------------------------------------------------------------
 
+================================================================================
+Redis 4.0.5     Released Thu Dec 1 16:03:32 CET 2017
+================================================================================
+
+Upgrade urgency CRITICAL: Redis 4.0.4 fix for PSYNC2 was broken, causing the
+                          slave to crash when receiving an RDB file from the
+                          master that contained a duplicated Lua script.
+
+Please upgrade ASAP if you are with 4.0.4 and you use any form of Lua scripting
+because this problem will easily crash Redis.
+
 ================================================================================
 Redis 4.0.4     Released Thu Nov 30 18:42:12 CET 2017
 ================================================================================
diff --git a/src/version.h b/src/version.h
index 42aca85c..c811247d 100644
--- a/src/version.h
+++ b/src/version.h
@@ -1 +1 @@
-#define REDIS_VERSION "4.0.4"
+#define REDIS_VERSION "4.0.5"