diff --git a/pkgs/python-packages.nix b/pkgs/python-packages.nix
--- a/pkgs/python-packages.nix
+++ b/pkgs/python-packages.nix
@@ -302,11 +302,11 @@ self: super: {
     };
   };
   "markupsafe" = super.buildPythonPackage {
-    name = "markupsafe-1.0";
+    name = "markupsafe-1.1.0";
     doCheck = false;
     src = fetchurl {
-      url = "https://files.pythonhosted.org/packages/4d/de/32d741db316d8fdb7680822dd37001ef7a448255de9699ab4bfcbdf4172b/MarkupSafe-1.0.tar.gz";
-      sha256 = "0rdn1s8x9ni7ss8rfiacj7x1085lx8mh2zdwqslnw8xc3l4nkgm6";
+      url = "https://files.pythonhosted.org/packages/ac/7e/1b4c2e05809a4414ebce0892fe1e32c14ace86ca7d50c70f00979ca9b3a3/MarkupSafe-1.1.0.tar.gz";
+      sha256 = "1lxirjypbdd3l9jl4vliilhfnhy7c7f2vlldqg1b0i74khn375sf";
     };
     meta = {
       license = [ pkgs.lib.licenses.bsdOriginal ];
diff --git a/requirements.txt b/requirements.txt
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ dulwich==0.13.0
 hgsubversion==1.9.3
 hg-evolve==8.0.1
 mako==1.0.7
-markupsafe==1.0.0
+markupsafe==1.1.0
 mercurial==4.6.2
 msgpack-python==0.5.6