diff --git a/requirements.txt b/requirements.txt
index 8fa61092..16903e58 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -79,7 +79,7 @@ oauthlib==2.1.0
 openapi-codec==1.3.2
 pandas==0.23.4
 Pillow==7.2.0
-protobuf==3.5.2.post1
+protobuf==3.15.0
 public==1.0.3
 py-vapid==1.4.0
 pyasn1==0.4.3