diff --git a/README.md b/README.md
index fcf3fab..5ff2889 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ Here is the current Swift compatibility breakdown:
 
 | Swift Version | Runes Version |
 | ------------- | ------------- |
-| 3.X           | master        |
+| 3.X           | 4.X           |
 | 2.X           | 3.X           |
 | 1.2           | 1.2, 2.X      |
 | 1.1           | < 1.2         |
diff --git a/Resources/Info.plist b/Resources/Info.plist
index 7add7c8..1bcfa6d 100644
--- a/Resources/Info.plist
+++ b/Resources/Info.plist
@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>3.2.1</string>
+	<string>4.0.0</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>
diff --git a/Runes.podspec b/Runes.podspec
index 2279d75..ab9f3f9 100644
--- a/Runes.podspec
+++ b/Runes.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |spec|
   spec.name = 'Runes'
-  spec.version = '3.2.1'
+  spec.version = '4.0.0'
   spec.summary = 'Functional operators for Swift'
   spec.homepage = 'https://github.com/thoughtbot/runes'
   spec.license = { :type => 'MIT', :file => 'LICENSE' }