diff --git a/KlaviyoSwift.podspec b/KlaviyoSwift.podspec
index f07adbeb..026c9a96 100644
--- a/KlaviyoSwift.podspec
+++ b/KlaviyoSwift.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = "KlaviyoSwift"
-  s.version          = "3.2.0"
+  s.version          = "4.0.0"
   s.summary          = "Incorporate Klaviyo's event and person tracking and push notifications functionality into iOS applications"
 
   s.description      = <<-DESC
diff --git a/KlaviyoSwiftExtension.podspec b/KlaviyoSwiftExtension.podspec
index 5870629d..d7abda9d 100644
--- a/KlaviyoSwiftExtension.podspec
+++ b/KlaviyoSwiftExtension.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = "KlaviyoSwiftExtension"
-  s.version          = "3.2.0"
+  s.version          = "4.0.0"
   s.summary          = "Incorporate Klaviyo's rich push notifications functionality into your iOS applications"
 
   s.description      = <<-DESC
diff --git a/MIGRATION_GUIDE.md b/MIGRATION_GUIDE.md
index 9ffa83cf..630429a1 100644
--- a/MIGRATION_GUIDE.md
+++ b/MIGRATION_GUIDE.md
@@ -3,6 +3,13 @@
 
 This guide outlines how developers can migrate from older versions of our SDK to newer ones.
 
+## Migrating to v4.0.0
+
+### `Event.EventName` enum:
+
+- We have removed the PascalCase names in the `Event.EventName` enum, leaving only the camelCase names. You will need to remove any references to the old PascalCase names. See [Migrating to v3.3.0](https://github.com/klaviyo/klaviyo-swift-sdk/blob/as/rel-400/MIGRATION_GUIDE.md#migrating-to-v330) below for more details.
+- We have removed the `.OpenedPush` case (there is no camelCase replacement), as this is intended for internal use only. You will need to remove any references to the `.OpenedPush` case.
+
 ## Migrating to v3.3.0
 
 We've updated the case names in the `Event.EventName` enum from PascalCase to camelCase, to be consistent with [Swift naming conventions](https://docs.swift.org/swift-book/documentation/the-swift-programming-language/enumerations/).
diff --git a/Sources/KlaviyoCore/Utils/Version.swift b/Sources/KlaviyoCore/Utils/Version.swift
index 41a5ab26..25d8d8e5 100644
--- a/Sources/KlaviyoCore/Utils/Version.swift
+++ b/Sources/KlaviyoCore/Utils/Version.swift
@@ -8,4 +8,4 @@
 import Foundation
 
 public let __klaviyoSwiftName = "swift"
-public let __klaviyoSwiftVersion = "3.2.0"
+public let __klaviyoSwiftVersion = "4.0.0"
diff --git a/Tests/KlaviyoCoreTests/__Snapshots__/EncodableTests/testEventPayload.1.json b/Tests/KlaviyoCoreTests/__Snapshots__/EncodableTests/testEventPayload.1.json
index 0fe6338e..b7b9dc63 100644
--- a/Tests/KlaviyoCoreTests/__Snapshots__/EncodableTests/testEventPayload.1.json
+++ b/Tests/KlaviyoCoreTests/__Snapshots__/EncodableTests/testEventPayload.1.json
@@ -36,7 +36,7 @@
         "OS Version" : "1.1.1",
         "Push Token" : "",
         "SDK Name" : "swift",
-        "SDK Version" : "3.2.0",
+        "SDK Version" : "4.0.0",
         "stuff" : 2
       },
       "time" : "2009-02-13T23:31:30Z",
diff --git a/Tests/KlaviyoCoreTests/__Snapshots__/EncodableTests/testKlaviyoRequest.1.json b/Tests/KlaviyoCoreTests/__Snapshots__/EncodableTests/testKlaviyoRequest.1.json
index 4e9b45c7..c3676c86 100644
--- a/Tests/KlaviyoCoreTests/__Snapshots__/EncodableTests/testKlaviyoRequest.1.json
+++ b/Tests/KlaviyoCoreTests/__Snapshots__/EncodableTests/testKlaviyoRequest.1.json
@@ -18,7 +18,7 @@
               "manufacturer" : "Orange",
               "os_name" : "iOS",
               "os_version" : "1.1.1",
-              "sdk_version" : "3.2.0"
+              "sdk_version" : "4.0.0"
             },
             "enablement_status" : "AUTHORIZED",
             "platform" : "ios",
diff --git a/Tests/KlaviyoCoreTests/__Snapshots__/EncodableTests/testTokenPayload.1.json b/Tests/KlaviyoCoreTests/__Snapshots__/EncodableTests/testTokenPayload.1.json
index 8935058a..e7705815 100644
--- a/Tests/KlaviyoCoreTests/__Snapshots__/EncodableTests/testTokenPayload.1.json
+++ b/Tests/KlaviyoCoreTests/__Snapshots__/EncodableTests/testTokenPayload.1.json
@@ -14,7 +14,7 @@
         "manufacturer" : "Orange",
         "os_name" : "iOS",
         "os_version" : "1.1.1",
-        "sdk_version" : "3.2.0"
+        "sdk_version" : "4.0.0"
       },
       "enablement_status" : "AUTHORIZED",
       "platform" : "ios",
diff --git a/Tests/KlaviyoCoreTests/__Snapshots__/NetworkSessionTests/testCreateEmphemeralSesionHeaders.1.txt b/Tests/KlaviyoCoreTests/__Snapshots__/NetworkSessionTests/testCreateEmphemeralSesionHeaders.1.txt
index 19cd06cb..2e074992 100644
--- a/Tests/KlaviyoCoreTests/__Snapshots__/NetworkSessionTests/testCreateEmphemeralSesionHeaders.1.txt
+++ b/Tests/KlaviyoCoreTests/__Snapshots__/NetworkSessionTests/testCreateEmphemeralSesionHeaders.1.txt
@@ -8,7 +8,7 @@
         - "deflate"
     ▿ (2 elements)
       - key: "User-Agent"
-      - value: "FooApp/1.2.3 (com.klaviyo.fooapp; build:1; iOS 1.1.1) klaviyo-ios/3.2.0"
+      - value: "FooApp/1.2.3 (com.klaviyo.fooapp; build:1; iOS 1.1.1) klaviyo-ios/4.0.0"
     ▿ (2 elements)
       - key: "X-Klaviyo-Mobile"
       - value: "1"
diff --git a/Tests/KlaviyoCoreTests/__Snapshots__/NetworkSessionTests/testDefaultUserAgent.1.txt b/Tests/KlaviyoCoreTests/__Snapshots__/NetworkSessionTests/testDefaultUserAgent.1.txt
index 40374900..24403918 100644
--- a/Tests/KlaviyoCoreTests/__Snapshots__/NetworkSessionTests/testDefaultUserAgent.1.txt
+++ b/Tests/KlaviyoCoreTests/__Snapshots__/NetworkSessionTests/testDefaultUserAgent.1.txt
@@ -1 +1 @@
-- "FooApp/1.2.3 (com.klaviyo.fooapp; build:1; iOS 1.1.1) klaviyo-ios/3.2.0"
+- "FooApp/1.2.3 (com.klaviyo.fooapp; build:1; iOS 1.1.1) klaviyo-ios/4.0.0"
diff --git a/Tests/KlaviyoSwiftTests/__Snapshots__/EncodableTests/testKlaviyoState.1.json b/Tests/KlaviyoSwiftTests/__Snapshots__/EncodableTests/testKlaviyoState.1.json
index edb7e4c7..dd711ce9 100644
--- a/Tests/KlaviyoSwiftTests/__Snapshots__/EncodableTests/testKlaviyoState.1.json
+++ b/Tests/KlaviyoSwiftTests/__Snapshots__/EncodableTests/testKlaviyoState.1.json
@@ -15,7 +15,7 @@
       "manufacturer" : "Orange",
       "os_name" : "iOS",
       "os_version" : "1.1.1",
-      "sdk_version" : "3.2.0"
+      "sdk_version" : "4.0.0"
     },
     "pushBackground" : "AVAILABLE",
     "pushEnablement" : "AUTHORIZED",
@@ -42,7 +42,7 @@
                   "manufacturer" : "Orange",
                   "os_name" : "iOS",
                   "os_version" : "1.1.1",
-                  "sdk_version" : "3.2.0"
+                  "sdk_version" : "4.0.0"
                 },
                 "enablement_status" : "AUTHORIZED",
                 "platform" : "ios",
diff --git a/Tests/KlaviyoSwiftTests/__Snapshots__/KlaviyoStateTests/testValidStateFileExists.1.txt b/Tests/KlaviyoSwiftTests/__Snapshots__/KlaviyoStateTests/testValidStateFileExists.1.txt
index 751eaaf8..507d0eba 100644
--- a/Tests/KlaviyoSwiftTests/__Snapshots__/KlaviyoStateTests/testValidStateFileExists.1.txt
+++ b/Tests/KlaviyoSwiftTests/__Snapshots__/KlaviyoStateTests/testValidStateFileExists.1.txt
@@ -28,7 +28,7 @@
         - manufacturer: "Orange"
         - osName: "iOS"
         - osVersion: "1.1.1"
-        - sdkVersion: "3.2.0"
+        - sdkVersion: "4.0.0"
       - pushBackground: PushBackground.available
       - pushEnablement: PushEnablement.authorized
       - pushToken: "blob_token"