diff --git a/README.md b/README.md
index 29305ab..8911694 100644
--- a/README.md
+++ b/README.md
@@ -15,4 +15,4 @@ bash cbuild/chmod_scripts.sh
 make
 ```
 
-You can create your own default config. Put it in project directory and name default.config.sh
+You can create your own default config. Put it in project directory and name default.config
diff --git a/default.config.sh b/default.config
similarity index 99%
rename from default.config.sh
rename to default.config
index bc75879..bab6f1b 100644
--- a/default.config.sh
+++ b/default.config
@@ -1,4 +1,5 @@
 #!/bin/bash
+CONFIG_VER=2
 
 PROJECT=some_project
 CMP_C=gcc
diff --git a/init.sh b/init.sh
index 9cac2a0..a3e707b 100644
--- a/init.sh
+++ b/init.sh
@@ -3,15 +3,35 @@
 source cbuild/colors.sh
 source cbuild/functions.sh
 
-#config
+function create_default_config(){
+    if [ -f "default.config" ]; then
+        cp default.config .config
+    else
+        cp cbuild/default.config .config
+    fi
+    print "${YELLOW}Default config created.\nEdit it.\n"
+}
+
+#.config
 if [ ! -f ".config" ]; then
     print "${YELLOW}./.config doesn't exist\n"
-    if [ -f "default.config.sh" ]; then
-        cp default.config.sh .config
-    else
-        cp cbuild/default.config.sh .config
-    fi
-    print "${YELLOW}Default config created.\nEdit it's values.\n"
+    create_default_config
     exit
 fi
 source .config
+#version check
+if [ ! $CONFIG_VER -eq 2 ]; then
+    print "${RED}Your config version isn't correct"
+    while true; do
+        print "${WHITE}Backup current config and create default one? (y/n) "
+        read answ
+        case $answ in
+            [Yy] ) 
+                cp .config .config.backup
+                create_default_config
+                exit;;
+            [Nn] ) exit;;
+            * ) print "${RED}incorrect answer\n";;
+        esac
+    done
+fi
\ No newline at end of file