diff --git a/unit01_cipher_fundamentals/src/a_09.py b/unit01_cipher_fundamentals/src/a_09.py
index fc9e806..ceb8eea 100644
--- a/unit01_cipher_fundamentals/src/a_09.py
+++ b/unit01_cipher_fundamentals/src/a_09.py
@@ -1,3 +1,4 @@
 import base64
 str="crypto"
-print (base64.b64encode(str))
+print (base64.b64encode(str.encode()))
+