diff --git a/geoportal/requirements.txt b/geoportal/requirements.txt
index b155bebb63..e51c07d7c7 100644
--- a/geoportal/requirements.txt
+++ b/geoportal/requirements.txt
@@ -10,7 +10,7 @@ GeoAlchemy2
 geojson
 isodate  # WMST support
 lingua
-Mako
+Mako==1.1.3
 OWSLib>=0.6.0
 papyrus
 psycopg2-binary