diff --git a/requirements.txt b/requirements.txt
index 9f25211..ad3f772 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,7 +21,7 @@ mock==2.0.0
 numpy==1.16.2
 pbr==5.1.2
 Pillow==8.1.1
-protobuf==3.6.1
+protobuf==3.18.3
 requests==2.21.0
 six==1.12.0
 tensorflow-gpu==2.4.0