diff --git a/configure.ac b/configure.ac
index 1f840780..04a40d20 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 AC_INIT([OTS],
-        [0.0.1],
+        [4.0.0],
         [https://github.com/khaledhosny/ots/issues],
         [ots],
         [https://github.com/khaledhosny/ots])