diff --git a/mongoose.h b/mongoose.h
index 21fc170013..c956670126 100644
--- a/mongoose.h
+++ b/mongoose.h
@@ -23,7 +23,7 @@
 #ifndef CS_MONGOOSE_SRC_COMMON_H_
 #define CS_MONGOOSE_SRC_COMMON_H_
 
-#define MG_VERSION "6.5"
+#define MG_VERSION "6.6"
 
 /* Local tweaks, applied before any of Mongoose's own headers. */
 #ifdef MG_LOCALS