diff --git a/requirements.txt b/requirements.txt
index 1258e05..c3eb3ca 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -37,7 +37,7 @@ cf-units>=2.1.5
 # cftime needs to be frozen for utime.  Some scripts could be rewritten to use
 # newer functions
 cftime==1.4.1
-flask-cors==4.0.1
+flask-cors==5.0.0
 compliance-checker>=5.0.0
 cc-plugin-glider>=2.0.3
 flasgger==0.9.7b2