diff --git a/setup.py b/setup.py
index e5301fd..57c6bba 100644
--- a/setup.py
+++ b/setup.py
@@ -27,7 +27,7 @@
     'oauthlib==3.1.0',
     'opt-einsum==3.2.0',
     'pandas==1.0.1',
-    'protobuf==3.11.3',
+    'protobuf==3.15.0',
     'pyasn1==0.4.8',
     'pyasn1-modules==0.2.8',
     'pydot==1.4.1',