diff --git a/requirements.txt b/requirements.txt
index ae7ce1d..e6bb9e3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -39,7 +39,7 @@ lxml==3.6.1
 MapProxy==1.9.0
 mccabe==0.3.1
 nose==1.3.7
-OWSLib==0.13.0
+OWSLib==0.15.0
 packaging==16.8
 pathlib2==2.2.1
 Paver==1.2.4