diff --git a/content/docs/ios/changelog.mdx b/content/docs/ios/changelog.mdx
index 5e7baeac..486eca4a 100644
--- a/content/docs/ios/changelog.mdx
+++ b/content/docs/ios/changelog.mdx
@@ -3,6 +3,12 @@ title: "Changelog"
 description: "Release notes for the Superwall iOS SDK"
 ---
 
+## 4.15.4
+
+### Enhancements
+
+- Adds `singularDeviceId` as an `IntegrationAttribute`.
+
 ## 4.15.3
 
 ### Fixes
diff --git a/content/docs/ios/index.mdx b/content/docs/ios/index.mdx
index dc2c9fd3..094bc43c 100644
--- a/content/docs/ios/index.mdx
+++ b/content/docs/ios/index.mdx
@@ -135,6 +135,6 @@ If you have feedback on any of our docs, please leave a rating and message at th
 If you have any issues with the SDK, please [open an issue on GitHub](https://github.com/superwall/superwall-ios/issues).
 
 <SdkLatestVersion
-  version="4.15.3"
+  version="4.15.4"
   repoUrl="https://github.com/superwall/Superwall-iOS"
 />
diff --git a/content/docs/ios/sdk-reference/index.mdx b/content/docs/ios/sdk-reference/index.mdx
index 2da77e19..6f06ac4c 100644
--- a/content/docs/ios/sdk-reference/index.mdx
+++ b/content/docs/ios/sdk-reference/index.mdx
@@ -101,6 +101,6 @@ If you have feedback on any of our docs, please leave a rating and message at th
 If you have any issues with the SDK, please [open an issue on GitHub](https://github.com/superwall/superwall-ios/issues).
 
 <SdkLatestVersion
-  version="4.15.3"
+  version="4.15.4"
   repoUrl="https://github.com/superwall/Superwall-iOS"
 />
diff --git a/content/docs/ios/sdk-reference/setIntegrationAttributes.mdx b/content/docs/ios/sdk-reference/setIntegrationAttributes.mdx
index 57a5cf61..f5b4fe37 100644
--- a/content/docs/ios/sdk-reference/setIntegrationAttributes.mdx
+++ b/content/docs/ios/sdk-reference/setIntegrationAttributes.mdx
@@ -148,6 +148,7 @@ Common integration attributes include:
 - `.mixpanelDistinctId` - Mixpanel distinct ID
 - `.firebaseInstallationId` - Firebase installation ID (4.10.8+)
 - `.appstackId` - Appstack identifier (4.12.11+)
+- `.singularDeviceId` - Singular device identifier (SDID) (4.15.4+)
 - `.custom(String)` - Custom attribute key
 
 ## Related