diff --git a/pkgs/development/python-modules/fiona/default.nix b/pkgs/development/python-modules/fiona/default.nix
index 5a0a97220fa9..a88db7b80f56 100644
--- a/pkgs/development/python-modules/fiona/default.nix
+++ b/pkgs/development/python-modules/fiona/default.nix
@@ -1,6 +1,6 @@
 { stdenv, lib, buildPythonPackage, fetchPypi, isPy3k, pythonOlder
 , attrs, click, cligj, click-plugins, six, munch, enum34
-, pytest, boto3, mock, giflib
+, pytest, boto3, mock, giflib, pytz
 , gdal_2 # can't bump to 3 yet, https://github.com/Toblerity/Fiona/issues/745
 }:
 
@@ -30,6 +30,7 @@ buildPythonPackage rec {
     click-plugins
     six
     munch
+    pytz
   ] ++ lib.optional (!isPy3k) enum34;
 
   checkInputs = [