diff --git a/requirements.txt b/requirements.txt
index b2065b12..2766ab70 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ matplotlib==3.1.0
 numpy==1.16.4
 opencv-python
 numpydoc==0.9.1
-protobuf==3.8.0
+protobuf==3.18.3
 tensorboard==2.0.2
 tensorflow-datasets==1.3.2
 tensorflow-estimator==2.0.1