diff --git a/pyproject.toml b/pyproject.toml
index 233945d..af313bd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,7 @@ classifiers = [
 dependencies = [
     "bsddb3==6.2.7",
     "flup6",
-    "gunicorn==19.9.0",
+    "gunicorn==22.0.0",
     "progressbar2",
     "requests",
     "six",