diff --git a/requirements.txt b/requirements.txt
index 41f64d4..ee0fac8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ numpy==1.18.5
 oauthlib==3.1.0
 opencv-python==4.4.0.42
 opt-einsum==3.3.0
-protobuf==3.13.0
+protobuf==3.15.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pycodestyle==2.6.0