diff --git a/.autover/changes/5aedf152-c101-48d9-8b44-545a72cd32dd.json b/.autover/changes/5aedf152-c101-48d9-8b44-545a72cd32dd.json
new file mode 100644
index 000000000..d3f4e84a6
--- /dev/null
+++ b/.autover/changes/5aedf152-c101-48d9-8b44-545a72cd32dd.json
@@ -0,0 +1,11 @@
+{
+  "Projects": [
+    {
+      "Name": "Amazon.Lambda.KinesisEvents",
+      "Type": "Patch",
+      "ChangelogMessages": [
+        "Update AWSSDK.Core dependency version to 4.0.3.8"
+      ]
+    }
+  ]
+}
\ No newline at end of file
diff --git a/Libraries/src/Amazon.Lambda.KinesisEvents/Amazon.Lambda.KinesisEvents.csproj b/Libraries/src/Amazon.Lambda.KinesisEvents/Amazon.Lambda.KinesisEvents.csproj
index 0bd6ea100..69aac114e 100644
--- a/Libraries/src/Amazon.Lambda.KinesisEvents/Amazon.Lambda.KinesisEvents.csproj
+++ b/Libraries/src/Amazon.Lambda.KinesisEvents/Amazon.Lambda.KinesisEvents.csproj
@@ -21,6 +21,7 @@
   </ItemGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' != 'netstandard2.0' ">
+    <PackageReference Include="AWSSDK.Core" Version="4.0.3.8" />
     <Compile Include="Converters\DictionaryLongToStringJsonConverter.cs" />
   </ItemGroup>
 
diff --git a/Libraries/test/EventsTests.NET6/EventsTests.NET6.csproj b/Libraries/test/EventsTests.NET6/EventsTests.NET6.csproj
index bd4f561f0..ad81c7629 100644
--- a/Libraries/test/EventsTests.NET6/EventsTests.NET6.csproj
+++ b/Libraries/test/EventsTests.NET6/EventsTests.NET6.csproj
@@ -62,7 +62,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="xunit" Version="2.4.1" />
-    <PackageReference Include="AWSSDK.Core" Version="4.0.0.0" />
+    <PackageReference Include="AWSSDK.Core" Version="4.0.3.8" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/Libraries/test/EventsTests.NET8/EventsTests.NET8.csproj b/Libraries/test/EventsTests.NET8/EventsTests.NET8.csproj
index aba878851..5e2f35c76 100644
--- a/Libraries/test/EventsTests.NET8/EventsTests.NET8.csproj
+++ b/Libraries/test/EventsTests.NET8/EventsTests.NET8.csproj
@@ -54,7 +54,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="xunit" Version="2.4.1" />
-    <PackageReference Include="AWSSDK.Core" Version="4.0.0.0" />
+    <PackageReference Include="AWSSDK.Core" Version="4.0.3.8" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/Libraries/test/EventsTests.NETCore31/EventsTests.NETCore31.csproj b/Libraries/test/EventsTests.NETCore31/EventsTests.NETCore31.csproj
index bc8b98c24..16c5e07d8 100644
--- a/Libraries/test/EventsTests.NETCore31/EventsTests.NETCore31.csproj
+++ b/Libraries/test/EventsTests.NETCore31/EventsTests.NETCore31.csproj
@@ -59,7 +59,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.0.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.2.0" />
     <PackageReference Include="xunit" Version="2.2.0" />
-    <PackageReference Include="AWSSDK.Core" Version="4.0.0" />
+    <PackageReference Include="AWSSDK.Core" Version="4.0.3.8" />
   </ItemGroup>
 
   <ItemGroup>