diff --git a/requirements.txt b/requirements.txt
index adf4fd8..7bf1a7e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -42,7 +42,7 @@ oauthlib==3.1.0
 opencv-python==4.2.0.32
 opt-einsum==3.1.0
 Pillow==8.2.0
-protobuf==3.11.2
+protobuf==3.15.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pyparsing==2.4.6