diff --git a/docs/configuration/server-properties.md b/docs/configuration/server-properties.md
index 30428830..4570dbf6 100644
--- a/docs/configuration/server-properties.md
+++ b/docs/configuration/server-properties.md
@@ -38,7 +38,9 @@ docker run -d -e DIFFICULTY=hard ...
 
 Valid values are: `peaceful`, `easy`, `normal`, and `hard`, and an
 error message will be output in the logs if it's not one of these
-values.
+values.
+
+Refer to [the Minecraft wiki](https://minecraft.wiki/w/Difficulty)
 
 ### Whitelist Players