diff --git a/requirements.txt b/requirements.txt
index e131444..4b58b57 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ Markdown==3.2.1
 matplotlib==3.2.1
 numpy==1.18.2
 opt-einsum==3.2.0
-protobuf==3.11.3
+protobuf==3.15.0
 pyglet==1.5.0
 pyparsing==2.4.7
 python-dateutil==2.8.1