diff --git a/requirements.txt b/requirements.txt
index afd54543..5270c3de 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ SQLAlchemy==1.3.8
 Flask-SQLAlchemy==2.4.0
 itsdangerous==1.1.0
 pyproj==1.9.6
-OWSLib==0.17.1  # update to new version when solution to OWSLIB #614 is released
+OWSLib==0.20.0
 jsonschema==3.0.2 # downgrade from 3.2.0 on sept 29, 2020, issue 331, consider better fix
 openapi-spec-validator==0.2.8
 Sphinx==2.2.0