diff --git a/requirements.txt b/requirements.txt
index 9348347..304b54d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,7 @@ numpy==1.18.5
 oauthlib==3.1.0
 opt-einsum==3.3.0
 Pillow==8.1.2
-protobuf==3.15.6
+protobuf==3.18.3
 psutil==5.8.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8