diff --git a/pkgs/development/python-modules/quart/default.nix b/pkgs/development/python-modules/quart/default.nix
index 9d52e15fbb2c..129c8f7fff0b 100644
--- a/pkgs/development/python-modules/quart/default.nix
+++ b/pkgs/development/python-modules/quart/default.nix
@@ -5,7 +5,7 @@
   pythonOlder,
 
   # build-system
-  poetry-core,
+  flit-core,
 
   # propagates
   aiofiles,
@@ -33,17 +33,17 @@
 
 buildPythonPackage rec {
   pname = "quart";
-  version = "0.19.9";
+  version = "0.20.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "pallets";
     repo = "quart";
     tag = version;
-    hash = "sha256-jekbrHpB+7d3IagVUtDYA1VFlWtnE7kPqIm19NB2scA=";
+    hash = "sha256-NApev3nRBS4QDMGq8++rSmK5YgeljkaVAsdezsTbZr4=";
   };
 
-  build-system = [ poetry-core ];
+  build-system = [ flit-core ];
 
   dependencies =
     [
@@ -79,7 +79,7 @@ buildPythonPackage rec {
     description = "Async Python micro framework for building web applications";
     mainProgram = "quart";
     homepage = "https://github.com/pallets/quart/";
-    changelog = "https://github.com/pallets/quart/blob/${src.rev}/CHANGES.rst";
+    changelog = "https://github.com/pallets/quart/blob/${src.tag}/CHANGES.rst";
     license = licenses.mit;
     maintainers = with maintainers; [ hexa ];
   };