diff --git a/Rules.md b/Rules.md
index 71dc2b29..224d0a8b 100644
--- a/Rules.md
+++ b/Rules.md
@@ -8,6 +8,7 @@
 * [blankLinesAroundMark](#blankLinesAroundMark)
 * [blankLinesAtEndOfScope](#blankLinesAtEndOfScope)
 * [blankLinesAtStartOfScope](#blankLinesAtStartOfScope)
+* [blankLinesBetweenChainedFunctions](#blankLinesBetweenChainedFunctions)
 * [blankLinesBetweenScopes](#blankLinesBetweenScopes)
 * [braces](#braces)
 * [conditionalAssignment](#conditionalAssignment)
@@ -89,7 +90,6 @@
 # Opt-in Rules (disabled by default)
 
 * [acronyms](#acronyms)
-* [blankLinesBetweenChainedFunctions](#blankLinesBetweenChainedFunctions)
 * [blankLinesBetweenImports](#blankLinesBetweenImports)
 * [blockComments](#blockComments)
 * [docComments](#docComments)
diff --git a/Sources/Rules.swift b/Sources/Rules.swift
index 49f4c5ef..de08c05b 100644
--- a/Sources/Rules.swift
+++ b/Sources/Rules.swift
@@ -1144,8 +1144,7 @@ public struct _FormatRules {
     public let blankLinesBetweenChainedFunctions = FormatRule(
         help: """
         Remove blank lines between chained functions but keep the linebreaks.
-        """,
-        disabledByDefault: true
+        """
     ) { formatter in
         formatter.forEach(.operator(".", .infix)) { i, _ in
             let endOfLine = formatter.endOfLine(at: i)