diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 341f5192dc6..b8e9cd8cb7b 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -10984,11 +10984,11 @@ in {
   };
 
   flask = buildPythonPackage {
-    name = "flask-0.10.1";
+    name = "flask-0.11.1";
 
     src = pkgs.fetchurl {
-      url = "mirror://pypi/F/Flask/Flask-0.10.1.tar.gz";
-      sha256 = "4c83829ff83d408b5e1d4995472265411d2c414112298f2eb4b359d9e4563373";
+      url = "mirror://pypi/F/Flask/Flask-0.11.1.tar.gz";
+      sha256 = "03kbfll4sj3v5z7r31c7bhfpi11r1np076d4p1k2kg4yzcmkywdl";
     };
 
     propagatedBuildInputs = with self; [ itsdangerous click werkzeug jinja2 ];