diff --git a/docs/requirements.txt b/docs/requirements.txt
index 931a2aa..f46dcb8 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -60,7 +60,7 @@ pandas==1.1.2
 pathspec==0.8.0
 pip==20.2.3
 pluggy==0.13.1
-protobuf==3.13.0
+protobuf==3.18.3
 py==1.9.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8