diff --git a/acinclude.m4 b/acinclude.m4
index 9535add6b..f1f89945a 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -64,12 +64,15 @@ AC_DEFUN([GB_PRINT_MESSAGES],
 
 AC_DEFUN([GB_INIT_AUTOMAKE],
 [
-  AM_INIT_AUTOMAKE($1, 3.0.90)
+  AM_INIT_AUTOMAKE($1, 3.1.0)
   ##AM_SILENT_RULES([yes])
   AM_CONFIG_HEADER([config.h])
-  AC_DEFINE(GAMBAS_FULL_VERSION, 0x03000090, [Full Gambas version])
+
+  ########## DO NOT FORGET TO MODIFY GB_INIT_SHORT ! ##########
+  AC_DEFINE(GAMBAS_FULL_VERSION, 0x03010000, [Full Gambas version])
   AC_DEFINE(GAMBAS_PCODE_VERSION, 0x03010000, [Gambas bytecode version])
   AC_DEFINE(GAMBAS_PCODE_VERSION_MIN, 0x03000000, [Minimum Gambas bytecode version])
+
   GB_CLEAR_MESSAGES
 ])
 
@@ -119,7 +122,7 @@ AC_DEFUN([GB_INIT_SHORT],
   
   GAMBAS_VERSION=3
   AC_SUBST(GAMBAS_VERSION)
-  GAMBAS_MINOR_VERSION=0
+  GAMBAS_MINOR_VERSION=1
   AC_SUBST(GAMBAS_MINOR_VERSION)
 
   gbbindir=$bindir/gambas$GAMBAS_VERSION