diff --git a/zmq.hpp b/zmq.hpp
index 97bca4e..a820afe 100644
--- a/zmq.hpp
+++ b/zmq.hpp
@@ -63,7 +63,7 @@
 
 /*  Version macros for compile-time API version detection                     */
 #define CPPZMQ_VERSION_MAJOR 4
-#define CPPZMQ_VERSION_MINOR 3
+#define CPPZMQ_VERSION_MINOR 4 
 #define CPPZMQ_VERSION_PATCH 0
 
 #define CPPZMQ_VERSION                                                              \