diff --git a/pkgs/python-packages.nix b/pkgs/python-packages.nix
--- a/pkgs/python-packages.nix
+++ b/pkgs/python-packages.nix
@@ -667,11 +667,11 @@ self: super: {
     };
   };
   "hupper" = super.buildPythonPackage {
-    name = "hupper-1.8.1";
+    name = "hupper-1.9.1";
     doCheck = false;
     src = fetchurl {
-      url = "https://files.pythonhosted.org/packages/c7/d0/e4b893c88eb8b7389d3a4b5306525742c3497b4bffe0a4257bbacbdbcec5/hupper-1.8.1.tar.gz";
-      sha256 = "0hilni2gzkcz5n3pqnwj4hs7vp017s7scz52n20x92ms8qmfqsaq";
+      url = "https://files.pythonhosted.org/packages/09/3a/4f215659f31eeffe364a984dba486bfa3907bfcc54b7013bdfe825cebb5f/hupper-1.9.1.tar.gz";
+      sha256 = "0pyg879fv9mbwlnbzw2a3234qqycqs9l97h5mpkmk0bvxhi2471v";
     };
     meta = {
       license = [ pkgs.lib.licenses.mit ];
diff --git a/requirements_pinned.txt b/requirements_pinned.txt
--- a/requirements_pinned.txt
+++ b/requirements_pinned.txt
@@ -3,18 +3,20 @@
 atomicwrites==1.3.0
 attrs==19.1.0
 billiard==3.6.1.0
+cffi==1.12.3
 chameleon==2.24
 configparser==4.0.2
 contextlib2==0.6.0
-cffi==1.12.3
 ecdsa==0.13.2
-hupper==1.8.1
 gnureadline==6.3.8
+hupper==1.9.1
+ipaddress==1.0.23
 jinja2==2.9.6
 jsonschema==2.6.0
+pluggy==0.13.0
 pyramid-jinja2==2.7
-pluggy==0.13.0
+scandir==1.10.0
 setproctitle==1.1.10
-scandir==1.10.0
 tempita==0.5.2
 vine==1.3.0
+