diff --git a/Source/Rules/MaximumLengthRule.swift b/Source/Rules/MaximumLengthRule.swift
index 0accb33..310bf8d 100644
--- a/Source/Rules/MaximumLengthRule.swift
+++ b/Source/Rules/MaximumLengthRule.swift
@@ -16,6 +16,6 @@ public struct MaximumLengthRule: Rule {
     
     public func validate<T>(_ value: T) -> Bool {
         guard let value = value as? String else { return false }
-        return value.characters.count <= Int(length)
+        return value.characters.count <= Int(self.length)
     }
 }
diff --git a/Source/Rules/MinimumLengthRule.swift b/Source/Rules/MinimumLengthRule.swift
index 1598564..bf3dce0 100644
--- a/Source/Rules/MinimumLengthRule.swift
+++ b/Source/Rules/MinimumLengthRule.swift
@@ -16,6 +16,6 @@ public struct MinimumLengthRule: Rule {
     
     public func validate<T>(_ value: T) -> Bool {
         guard let value = value as? String else { return false }
-        return value.characters.count >= Int(length)
+        return value.characters.count >= Int(self.length)
     }
 }