diff --git a/src/OpenTelemetry.Contrib.Instrumentation.AWSLambda/CHANGELOG.md b/src/OpenTelemetry.Contrib.Instrumentation.AWSLambda/CHANGELOG.md
index 61ade2e4b0..ba2479e0a3 100644
--- a/src/OpenTelemetry.Contrib.Instrumentation.AWSLambda/CHANGELOG.md
+++ b/src/OpenTelemetry.Contrib.Instrumentation.AWSLambda/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 ## Unreleased
 
+* Updated the `ActivitySource` name to the assembly name:
+  `OpenTelemetry.Instrumentation.AWSLambda`
+  ([#534](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/534))
 * Added public option `AWSLambdaInstrumentationOptions.DisableAwsXRayContextExtraction`.
 * Extended public API of the `AWSLambdaWrapper`: added optional parent
   context (`ActivityContext`) to all `Trace` methods.
diff --git a/src/OpenTelemetry.Contrib.Instrumentation.AWSLambda/Implementation/AWSLambdaUtils.cs b/src/OpenTelemetry.Contrib.Instrumentation.AWSLambda/Implementation/AWSLambdaUtils.cs
index f387ec69a5..9d84d9b78f 100644
--- a/src/OpenTelemetry.Contrib.Instrumentation.AWSLambda/Implementation/AWSLambdaUtils.cs
+++ b/src/OpenTelemetry.Contrib.Instrumentation.AWSLambda/Implementation/AWSLambdaUtils.cs
@@ -30,7 +30,9 @@ namespace OpenTelemetry.Contrib.Instrumentation.AWSLambda.Implementation
     /// </summary>
     internal static class AWSLambdaUtils
     {
-        internal const string ActivitySourceName = "Amazon.AWS.AWSLambdaInstrumentation";
+        internal static string ActivitySourceName =
+            typeof(AWSLambdaUtils).Assembly.GetName().Name.Replace(".Contrib", string.Empty);
+
         private const string CloudProvider = "aws";
         private const string AWSRegion = "AWS_REGION";
         private const string AWSXRayLambdaTraceHeaderKey = "_X_AMZN_TRACE_ID";