diff --git a/DOCUMENTATION.md b/DOCUMENTATION.md
index 7fb8bbf8..21ce0733 100644
--- a/DOCUMENTATION.md
+++ b/DOCUMENTATION.md
@@ -763,6 +763,8 @@ The maximum size of the request body. (bytes)
 
 Default: `100000000`
 
+In case of using a reverse proxy in front of check also there related option
+
 ##### timeout
 
 Socket timeout. (seconds)
diff --git a/config b/config
index 8f536958..cee373d3 100644
--- a/config
+++ b/config
@@ -22,6 +22,7 @@
 #max_connections = 8
 
 # Max size of request body (bytes)
+# In case of using a reverse proxy in front of check also there related option
 #max_content_length = 100000000
 
 # Socket timeout (seconds)