diff --git a/src/app.cpp b/src/app.cpp
index 7a1568f..4307a81 100644
--- a/src/app.cpp
+++ b/src/app.cpp
@@ -1,3 +1,10 @@
+/*     
+ *      author  : xnti (https://github.com/xnti)
+ *      purpose : handling application structure and basic functions.
+ *      license : MIT
+ */
+
+
 #include "include/app.h"
 #include "include/json.h"
 
diff --git a/src/include/app.h b/src/include/app.h
index 3bbb542..0696e56 100644
--- a/src/include/app.h
+++ b/src/include/app.h
@@ -1,3 +1,10 @@
+/*     
+ *      author  : xnti (https://github.com/xnti)
+ *      purpose : handling application structure and basic functions.
+ *      license : MIT
+ */
+
+
 #ifndef _APP_H
 #define _APP_H
 
diff --git a/src/include/json.h b/src/include/json.h
index f772293..7a0b399 100644
--- a/src/include/json.h
+++ b/src/include/json.h
@@ -1,3 +1,10 @@
+/*     
+ *      author  : xnti (https://github.com/xnti)
+ *      purpose : handling json objects & convert them.
+ *      license : MIT
+ */
+
+
 #ifndef _JSON_H
 #define _JSON_H
 
diff --git a/src/json.cpp b/src/json.cpp
index b2d59e5..41d1306 100644
--- a/src/json.cpp
+++ b/src/json.cpp
@@ -1,7 +1,10 @@
-
-/**     author: xnti
- *      purpose: handling json objects & convert them.
+/*     
+ *      author  : xnti (https://github.com/xnti)
+ *      purpose : handling json objects & convert them.
+ *      license : MIT
  */
+
+
 #include <iostream>
 #include "include/json.h"
 #include "include/app.h"
diff --git a/src/main.cpp b/src/main.cpp
index 960a935..960e247 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,3 +1,9 @@
+/*     
+ *      author  : xnti (https://github.com/xnti)
+ *      license : MIT
+ */
+
+
 #include <iostream>
 #include "include/app.h"
 #include "include/json.h"