diff --git a/deep-learning/udacity-deeplearning/transfer-learning/requirements.txt b/deep-learning/udacity-deeplearning/transfer-learning/requirements.txt
old mode 100755
new mode 100644
index 9383bd558..cd65ce221
--- a/deep-learning/udacity-deeplearning/transfer-learning/requirements.txt
+++ b/deep-learning/udacity-deeplearning/transfer-learning/requirements.txt
@@ -30,7 +30,7 @@ pexpect==4.2.1
 pickleshare==0.7.4
 Pillow==4.0.0
 prompt-toolkit==1.0.14
-protobuf==3.2.0
+protobuf==3.15.0
 ptyprocess==0.5.1
 Pygments==2.2.0
 pyparsing==2.2.0