diff --git a/Include/modsupport.h b/Include/modsupport.h
index 0f6f06c..7b1cae8 100644
--- a/Include/modsupport.h
+++ b/Include/modsupport.h
@@ -97,7 +97,7 @@
    The full MS_DLL_VERSION_ID is imbedded in the core DLL, and
    is so installers can determine incremental changes.
 */
-#define MS_DLL_ID "1.4.0"
+#define MS_DLL_ID "1.5.0"
 #define MS_DLL_VERSION_ID       MS_DLL_ID "." PYTHON_API_STRING
 
 #endif /* MS_WINDOWS */