diff --git a/requirements.txt b/requirements.txt
index 867476c..7ae1774 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ Cerberus==0.9.2
 Eve==0.7.4
 Flask==0.11.0
 Flask-Caching==1.2.0
-Flask-Cors==3.0.3
+Flask-Cors==4.0.2
 Flask-Excel==0.0.7
 Flask-PyMongo==0.5.1
 geoip2==2.5.0
diff --git a/setup.py b/setup.py
index 1d05451..fadebc3 100644
--- a/setup.py
+++ b/setup.py
@@ -67,7 +67,7 @@ def run(self):
         'geojson_utils',
         'geojson>=1.3.4,<1.4',
         'geoip2>=2.4.2,<3',
-        'flask-cors>=3.0.2,<4',
+        'flask-cors>=3.0.2,<5',
         'shortid>=0.1.2,<0.2',
         'beautifulsoup4>=4.6,<5',
         'wikipedia>=1.4,<2',