diff --git a/unit04_public_key/lab/README.md b/unit04_public_key/lab/README.md
index 17aac0c..7f62ac9 100644
--- a/unit04_public_key/lab/README.md
+++ b/unit04_public_key/lab/README.md
@@ -489,8 +489,8 @@ key = RSA.generate(2048)
 binPrivKey = key.exportKey('PEM')
 binPubKey =  key.publickey().exportKey('PEM')
 
-print binPrivKey
-print binPubKey
+print (binPrivKey)
+print (binPubKey)
 ```