diff --git a/DRLND_deep_reinforcement_learning_nanodegree/dependencies/requirements.txt b/DRLND_deep_reinforcement_learning_nanodegree/dependencies/requirements.txt
index 76db4e5..c70b8a7 100644
--- a/DRLND_deep_reinforcement_learning_nanodegree/dependencies/requirements.txt
+++ b/DRLND_deep_reinforcement_learning_nanodegree/dependencies/requirements.txt
@@ -6,7 +6,7 @@ jupyter
 pytest>=3.2.2
 docopt
 pyyaml
-protobuf==3.5.2
+protobuf==3.18.3
 grpcio==1.11.0
 torch==0.4.0
 pandas