diff --git a/requirements.txt b/requirements.txt
index 46969c7..9ca5459 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -69,7 +69,7 @@ Pillow==7.0.0
 plotnine==0.3.0
 prometheus-client==0.7.1
 prompt-toolkit==3.0.5
-protobuf==3.11.4
+protobuf==3.18.3
 ptyprocess==0.6.0
 pycparser==2.20
 pydicom==2.0.0