diff --git a/CMakeLists.txt b/CMakeLists.txt
index e575da31..e7e7f9c2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,7 +11,7 @@ project(mosquitto)
 cmake_minimum_required(VERSION 2.8)
 # Only for version 3 and up. cmake_policy(SET CMP0042 NEW)
 
-set (VERSION 1.4)
+set (VERSION 1.4.90)
 
 if (WIN32)
 	execute_process(COMMAND cmd /c echo %DATE% %TIME% OUTPUT_VARIABLE TIMESTAMP
diff --git a/config.mk b/config.mk
index 129181e3..d7a732a6 100644
--- a/config.mk
+++ b/config.mk
@@ -83,7 +83,7 @@ WITH_SOCKS:=yes
 
 # Also bump lib/mosquitto.h, CMakeLists.txt,
 # installer/mosquitto.nsi, installer/mosquitto-cygwin.nsi
-VERSION=1.4
+VERSION=1.4.90
 TIMESTAMP:=$(shell date "+%F %T%z")
 
 # Client library SO version. Bump if incompatible API/ABI changes are made.
diff --git a/installer/mosquitto-cygwin.nsi b/installer/mosquitto-cygwin.nsi
index 39527f95..a472ef8b 100644
--- a/installer/mosquitto-cygwin.nsi
+++ b/installer/mosquitto-cygwin.nsi
@@ -7,7 +7,7 @@
 !define env_hklm 'HKLM "SYSTEM\CurrentControlSet\Control\Session Manager\Environment"'
 
 Name "mosquitto"
-!define VERSION 1.4
+!define VERSION 1.4.90
 OutFile "mosquitto-${VERSION}-install-cygwin.exe"
 
 InstallDir "$PROGRAMFILES\mosquitto"
diff --git a/installer/mosquitto.nsi b/installer/mosquitto.nsi
index edbc623a..6f0dbbc2 100644
--- a/installer/mosquitto.nsi
+++ b/installer/mosquitto.nsi
@@ -7,7 +7,7 @@
 !define env_hklm 'HKLM "SYSTEM\CurrentControlSet\Control\Session Manager\Environment"'
 
 Name "mosquitto"
-!define VERSION 1.4
+!define VERSION 1.4.90
 OutFile "mosquitto-${VERSION}-install-win32.exe"
 
 InstallDir "$PROGRAMFILES\mosquitto"
diff --git a/lib/mosquitto.h b/lib/mosquitto.h
index 8bc16921..a0ac2a65 100644
--- a/lib/mosquitto.h
+++ b/lib/mosquitto.h
@@ -45,7 +45,7 @@ extern "C" {
 
 #define LIBMOSQUITTO_MAJOR 1
 #define LIBMOSQUITTO_MINOR 4
-#define LIBMOSQUITTO_REVISION 0
+#define LIBMOSQUITTO_REVISION 90
 /* LIBMOSQUITTO_VERSION_NUMBER looks like 1002001 for e.g. version 1.2.1. */
 #define LIBMOSQUITTO_VERSION_NUMBER (LIBMOSQUITTO_MAJOR*1000000+LIBMOSQUITTO_MINOR*1000+LIBMOSQUITTO_REVISION)