diff --git a/backend/app.py b/backend/app.py
index 97246bb..95d8214 100644
--- a/backend/app.py
+++ b/backend/app.py
@@ -1,3 +1,4 @@
+# All code in this file is licensed under the ISC license, provided in LICENSE.txt
 from flask import Flask, redirect, url_for, request
 import flask
 import sensors
diff --git a/backend/sensors.py b/backend/sensors.py
index 9bc645b..c9323fa 100644
--- a/backend/sensors.py
+++ b/backend/sensors.py
@@ -1,7 +1,6 @@
 # sensors.py - a module for interfacing to the sensors
 # Copyright 2019 Kristjan Komloši
-# The code in this file is licensed under the 3-clause BSD License
-
+# All code in this file is licensed under the ISC license, provided in LICENSE.txt
 import serial as ser
 import pandas as pd
 import smbus2
diff --git a/backend/storage.py b/backend/storage.py
index 31b141b..b3e09eb 100644
--- a/backend/storage.py
+++ b/backend/storage.py
@@ -1,6 +1,6 @@
 # storage.py - storage backend for TeraHz
 # Copyright Kristjan Komloši 2019
-# This code is licensed under the 3-clause BSD license
+# All code in this file is licensed under the ISC license, provided in LICENSE.txt
 
 
 import sqlite3
diff --git a/frontend/frontend.js b/frontend/frontend.js
index 4bc5027..7ea450c 100644
--- a/frontend/frontend.js
+++ b/frontend/frontend.js
@@ -1,3 +1,4 @@
+// All code in this file is licensed under the ISC license, provided in LICENSE.txt
 var globalObject;
 $('#update').click(function () {
   updateData();
diff --git a/main.py b/main.py
index 5cbb845..e8f63e6 100644
--- a/main.py
+++ b/main.py
@@ -1,5 +1,5 @@
-#main.py - the main program file of the TeraHz project
-#This code is licensed under 3-clause BSD licensed
+# main.py - the main program file of the TeraHz project
+# All code in this file is licensed under the ISC license, provided in LICENSE.txt
 import serial as ser
 
 #global config
diff --git a/utils/getcdata.py b/utils/getcdata.py
index 49741f2..e87706e 100644
--- a/utils/getcdata.py
+++ b/utils/getcdata.py
@@ -1,5 +1,6 @@
 # getcdata.py - fetch the calibrated data from the AS7265x module
-# this program is 3-clause BSD license
+# All code in this file is licensed under the ISC license, provided in LICENSE.txt
+
 import serial as ser
 import pandas as pd
 import numpy as np