diff --git a/CHANGELOG.md b/CHANGELOG.md
index 227628018..17d95e867 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,7 +6,7 @@
 
 ##### Enhancements
 
-* Add `fallthrough` opt-in rule that flags usage of `fallthrough`.  
+* Add `fallthrough` rule that flags usage of `fallthrough`.  
   [Marcelo Fabri](https://github.com/marcelofabri)
   [#1834](https://github.com/realm/SwiftLint/issues/1834)
 
diff --git a/Rules.md b/Rules.md
index 45f4da491..37c2a2ac7 100644
--- a/Rules.md
+++ b/Rules.md
@@ -2496,7 +2496,7 @@ public extension Foo {
 
 Identifier | Enabled by default | Supports autocorrection | Kind 
 --- | --- | --- | ---
-`fallthrough` | Disabled | No | idiomatic
+`fallthrough` | Enabled | No | idiomatic
 
 Fallthrough should be avoided.
 
diff --git a/Source/SwiftLintFramework/Rules/FallthroughRule.swift b/Source/SwiftLintFramework/Rules/FallthroughRule.swift
index 57a77ca16..3437d6577 100644
--- a/Source/SwiftLintFramework/Rules/FallthroughRule.swift
+++ b/Source/SwiftLintFramework/Rules/FallthroughRule.swift
@@ -8,7 +8,7 @@
 
 import SourceKittenFramework
 
-public struct FallthroughRule: ConfigurationProviderRule, OptInRule {
+public struct FallthroughRule: ConfigurationProviderRule {
 
     public var configuration = SeverityConfiguration(.warning)