diff --git a/Source/Modules/ControllerModules/InputState.swift b/Source/Modules/ControllerModules/InputState.swift
index a39c038c..355ee4f0 100644
--- a/Source/Modules/ControllerModules/InputState.swift
+++ b/Source/Modules/ControllerModules/InputState.swift
@@ -150,7 +150,7 @@ class InputState: NSObject {
     // MARK: -
 
     private let kMinMarkRangeLength = 2
-    private let kMaxMarkRangeLength = 6
+    private let kMaxMarkRangeLength = Preferences.maxCandidateLength
 
     /// Represents that the user is marking a range in the composing buffer.
     @objc (InputStateMarking)