diff --git a/Makefile b/Makefile
index 81527e8..6e5b2e2 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,6 @@
+# Copyright (c) 2019 André Filipe Caldas Laranjeira
+# MIT License
+
 # Message logger - Project makefile.
 
 # Executable name:
diff --git a/include/message_logger.h b/include/message_logger.h
index 7ff1edb..ada89eb 100644
--- a/include/message_logger.h
+++ b/include/message_logger.h
@@ -1,3 +1,6 @@
+// Copyright (c) 2019 André Filipe Caldas Laranjeira
+// MIT License
+
 // Message logger module - Header file.
 
 // Define guard:
diff --git a/src/message_logger.c b/src/message_logger.c
index dc7b979..0665c08 100644
--- a/src/message_logger.c
+++ b/src/message_logger.c
@@ -1,3 +1,6 @@
+// Copyright (c) 2019 André Filipe Caldas Laranjeira
+// MIT License
+
 // Message logger module - Source code.
 
 // Includes:
diff --git a/src/sample.c b/src/sample.c
index 1b7c49d..fd38cd3 100644
--- a/src/sample.c
+++ b/src/sample.c
@@ -1,4 +1,7 @@
-// Test program for MessageLogger module.
+// Copyright (c) 2019 André Filipe Caldas Laranjeira
+// MIT License
+
+// Test program for the Message Logger module.
 
 // Includes:
 #include <pthread.h>