diff --git a/pkgs/development/python-modules/owslib/default.nix b/pkgs/development/python-modules/owslib/default.nix
index e5dea71c8fd8..b19e41116f02 100644
--- a/pkgs/development/python-modules/owslib/default.nix
+++ b/pkgs/development/python-modules/owslib/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchPypi, dateutil, requests, pytz, pyproj , pytest } :
+{ lib, buildPythonPackage, fetchPypi, dateutil, requests, pytz, pyproj , pytest, pyyaml } :
 buildPythonPackage rec {
   pname = "OWSLib";
   version = "0.19.2";
@@ -9,7 +9,7 @@ buildPythonPackage rec {
   };
 
   buildInputs = [ pytest ];
-  propagatedBuildInputs = [ dateutil pyproj pytz requests ];
+  propagatedBuildInputs = [ dateutil pyproj pytz requests pyyaml ];
 
   # 'tests' dir not included in pypy distribution archive.
   doCheck = false;