diff --git a/src/tt.h b/src/tt.h
index 4633dc3..6d56abf 100644
--- a/src/tt.h
+++ b/src/tt.h
@@ -3,7 +3,7 @@
 
 #include <string>
 
-#define TT_VERSION 1.0
+#define TT_VERSION 1.0.0
 
 // global variables:
 extern std::string user_name;