diff --git a/requirements-app.txt b/requirements-app.txt
index 44569a3b3..908b37e7b 100644
--- a/requirements-app.txt
+++ b/requirements-app.txt
@@ -3,7 +3,7 @@
 
 ago==0.0.93
 govuk-bank-holidays==0.6
-humanize==2.2.0
+humanize==2.4.0
 Flask==1.1.1
 Flask-WTF==0.14.3
 Flask-Login==0.5.0