diff --git a/capstone/requirements.txt b/capstone/requirements.txt
index 7bef2fac..22909bd5 100644
--- a/capstone/requirements.txt
+++ b/capstone/requirements.txt
@@ -47,7 +47,7 @@ pickleshare==0.7.5
 pillow>=6.2.0
 prometheus-client==0.6.0
 prompt-toolkit==2.0.9
-protobuf==3.7.1
+protobuf==3.18.3
 ptyprocess==0.6.0
 pydot==1.4.1
 Pygments==2.3.1