diff --git a/binder/requirements.txt b/binder/requirements.txt
index 516ac50..981e54f 100644
--- a/binder/requirements.txt
+++ b/binder/requirements.txt
@@ -13,7 +13,7 @@ Markdown==3.2.2
 numpy==1.19.5
 opt-einsum==3.2.1
 pandas==0.24.2
-protobuf==3.12.2
+protobuf==3.18.3
 python-dateutil==2.8.1
 pytz==2020.1
 six==1.15.0