diff --git a/MillerRabin.py b/MillerRabin.py
index 60ce292..878a3d9 100644
--- a/MillerRabin.py
+++ b/MillerRabin.py
@@ -1,5 +1,5 @@
 
-# Copyright (C) 2019, 2020 Hesham T. Banafa
+# Copyright (C) 2019-2021 Hesham T. Banafa
 
 #From: https://stackoverflow.com/questions/17298130/working-with-large-primes-in-python
 from random import randrange
diff --git a/OAEP.py b/OAEP.py
index 5d1e749..c6096ec 100644
--- a/OAEP.py
+++ b/OAEP.py
@@ -1,4 +1,4 @@
-# Copyright (C) 2019, 2020 Hesham T. Banafa
+# Copyright (C) 2019-2021 Hesham T. Banafa
 
 #From: https://stackoverflow.com/questions/39964383/implementation-of-i2osp-and-os2ip
 
diff --git a/encodetest.py b/encodetest.py
index 432cc6e..bb36fc5 100644
--- a/encodetest.py
+++ b/encodetest.py
@@ -1,6 +1,6 @@
 #!/usr/bin/python3
 
-# Copyright (C) 2019, 2020 Hesham T. Banafa
+# Copyright (C) 2019-2021 Hesham T. Banafa
 
 s = 'test message hello awdawd'
 print(s)
diff --git a/rsa.py b/rsa.py
index 6362e93..2a0c537 100755
--- a/rsa.py
+++ b/rsa.py
@@ -1,6 +1,6 @@
 #!/usr/bin/python3
 
-# Copyright (C) 2019, 2020 Hesham T. Banafa
+# Copyright (C) 2019-2021 Hesham T. Banafa
 
 #program to generate rsa key pair using methods in EE-305
 # Hesham Banafa