diff --git a/python/requirements.txt b/python/requirements.txt
index 62f13d2..220fb3f 100644
--- a/python/requirements.txt
+++ b/python/requirements.txt
@@ -8,7 +8,7 @@ idna==2.6
 itsdangerous==0.24
 Jinja2==2.11.3
 MarkupSafe==1.0
-protobuf==3.5.2.post1
+protobuf==3.15.0
 requests==2.20.0
 six==1.11.0
 urllib3==1.24.2