diff --git a/requirements.txt b/requirements.txt
index 335ae6e..25db045 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ Jinja2==2.10.1
 lazy-object-proxy==1.4.2
 MarkupSafe==1.0
 mccabe==0.6.1
-protobuf==3.7.1
+protobuf==3.15.0
 pycairo==1.18.1
 PyGObject==3.32.1
 pylint==2.4.2