diff --git a/requirements.txt b/requirements.txt
index e4a1a4f8..8010c904 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -185,7 +185,7 @@ ppft==1.7.6.5
 prometheus-client==0.14.1
 prompt-toolkit==3.0.30
 proto-plus==1.22.1
-protobuf==4.21.5
+protobuf==4.21.6
 psutil==5.9.1
 psygnal==0.3.5
 ptyprocess==0.7.0