diff --git a/src/MiniDocs/ZnConstants.extension.st b/src/MiniDocs/ZnConstants.extension.st
new file mode 100644
index 0000000..aea301c
--- /dev/null
+++ b/src/MiniDocs/ZnConstants.extension.st
@@ -0,0 +1,10 @@
+Extension { #name : #ZnConstants }
+
+{ #category : #'*MiniDocs' }
+ZnConstants class >> maximumLineLength [
+	"Return the maximum line length to accept.
+	Used by ZnLineReader and thus for reading request/status lines as well as headers.
+	This helps to protect us from malicious content."
+
+	^ 5096 "8192"
+]