diff --git a/Sources/Segment/Plugins/Context.swift b/Sources/Segment/Plugins/Context.swift
index f7ddafb3..afc6502b 100644
--- a/Sources/Segment/Plugins/Context.swift
+++ b/Sources/Segment/Plugins/Context.swift
@@ -13,6 +13,7 @@ public class Context: PlatformPlugin {
     
     internal var staticContext = staticContextData()
     internal static var device = VendorSystem.current
+    internal let instanceId = UUID().uuidString
     
     public func execute<T: RawEvent>(event: T?) -> T? {
         guard var workingEvent = event else { return event }
@@ -21,6 +22,9 @@ public class Context: PlatformPlugin {
         
         insertDynamicPlatformContextData(context: &context)
         
+        // add instanceId to the context
+        context["instanceId"] = instanceId
+        
         // if this event came in with context data already
         // let it take precedence over our values.
         if let eventContext = workingEvent.context?.dictionaryValue {
@@ -42,7 +46,7 @@ public class Context: PlatformPlugin {
         // library name
         staticContext["library"] = [
             "name": "analytics-swift",
-            "version": __segment_version
+            "version": __segment_version,
         ]
         
         // app info
diff --git a/Sources/Segment/Utilities/HTTPClient.swift b/Sources/Segment/Utilities/HTTPClient.swift
index 19795c8a..004999cd 100644
--- a/Sources/Segment/Utilities/HTTPClient.swift
+++ b/Sources/Segment/Utilities/HTTPClient.swift
@@ -157,7 +157,6 @@ extension HTTPClient {
         var request = URLRequest(url: url, cachePolicy: .reloadIgnoringLocalCacheData, timeoutInterval: 60)
         request.httpMethod = method
         request.addValue("application/json; charset=utf-8", forHTTPHeaderField: "Content-Type")
-        request.addValue("Basic \(apiKey)", forHTTPHeaderField: "Authorization")
         request.addValue("analytics-ios/\(Analytics.version())", forHTTPHeaderField: "User-Agent")
         request.addValue("gzip", forHTTPHeaderField: "Accept-Encoding")
         
diff --git a/Tests/Segment-Tests/Analytics_Tests.swift b/Tests/Segment-Tests/Analytics_Tests.swift
index 64d257a2..f40404db 100644
--- a/Tests/Segment-Tests/Analytics_Tests.swift
+++ b/Tests/Segment-Tests/Analytics_Tests.swift
@@ -536,7 +536,6 @@ final class Analytics_Tests: XCTestCase {
         let config = Configuration(writeKey: "testSequential").requestFactory { request in
             XCTAssertEqual(request.value(forHTTPHeaderField: "Accept-Encoding"), "gzip")
             XCTAssertEqual(request.value(forHTTPHeaderField: "Content-Type"), "application/json; charset=utf-8")
-            XCTAssertEqual(request.value(forHTTPHeaderField: "Authorization"), "Basic testSequential")
             XCTAssertTrue(request.value(forHTTPHeaderField: "User-Agent")!.contains("analytics-ios/"))
             return request
         }.errorHandler { error in