diff --git a/tools/README-generator/requirements.txt b/tools/README-generator/requirements.txt
index 258b9cf8..b93711b1 100644
--- a/tools/README-generator/requirements.txt
+++ b/tools/README-generator/requirements.txt
@@ -1,4 +1,4 @@
 jinja2
-sanic
+sanic==21.6.2
 pyyaml
 toml