diff --git a/docs/github.md b/docs/github.md
index 239d145..a530aff 100644
--- a/docs/github.md
+++ b/docs/github.md
@@ -18,6 +18,10 @@ Content-type should be `application/json`
 
 It'll refresh versions cache everytime you update a release on GitHub.
 
+### Content Type
+
+Make sure to set the Webhook content type to "application/json" instead of the default "application/x-www-form-urlencoded".
+
 ### Secret
 
 The GitHub Webhook secret can be configured as a environment variable on Nuts: `GITHUB_SECRET` (default value is `secret`).