diff --git a/covid19python.toml b/covid19python.toml
index bae27796cfc5c4d0ec5feb78a2eb506d82fde481..d91835947733727ee73ede179616e5d14365abb7 100644
--- a/covid19python.toml
+++ b/covid19python.toml
@@ -7,6 +7,7 @@ requires = [
     "pip-tools==5.5.0",
     "packaging==20.0",
     "npmdownloader>=1.2.1",
+    "flask-debugtoolbar>=0.11.0",
     "py2puml==0.3.1",
     "plantuml-creator==1.0.7",
     "plantuml-markdown==3.4.2",