diff --git a/requirements.txt b/requirements.txt
index 479e307..f24b364 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ djangorestframework==3.15.2
 emoji-data-python==1.5.0
 gunicorn==22.0.0
 git+https://github.com/hmcts/response.git@0.0.8#egg=response
-idna==3.7
+idna==3.10
 jsonfield==3.1.0
 markdown2==2.5.0
 munch==4.0.0