diff --git a/OpenTelemetryExtension.slnx b/OpenTelemetryExtension.slnx
index c088c95..2bbd51a 100644
--- a/OpenTelemetryExtension.slnx
+++ b/OpenTelemetryExtension.slnx
@@ -26,6 +26,7 @@
     <File Path="release-notes/v2.1.2.md" />
     <File Path="release-notes/v2.1.3.md" />
     <File Path="release-notes/v2.1.4.md" />
+    <File Path="release-notes/v2.1.5.md" />
   </Folder>
   <Folder Name="/.github/workflows/">
     <File Path=".github/workflows/ci.yml" />
diff --git a/release-notes/v2.1.5.md b/release-notes/v2.1.5.md
new file mode 100644
index 0000000..5dd1fe9
--- /dev/null
+++ b/release-notes/v2.1.5.md
@@ -0,0 +1,13 @@
+# v2.1.5
+
+_Released: 2026-09-28_
+
+## Changed
+- Updated the bundled OpenTelemetry packages: `Exporter.OpenTelemetryProtocol`
+  and `Extensions.Hosting` to 1.19.1, `Instrumentation.Http`,
+  `Instrumentation.AspNetCore` and `Instrumentation.Runtime` to 1.19.0. No public
+  API or runtime behavior change.
+- Updated the sample and test project dependencies (EF Core, ASP.NET Core OpenAPI,
+  `Microsoft.Extensions.Hosting`, HTTP resilience, service discovery, NLog,
+  `Microsoft.Data.SqlClient`, `OpenTelemetry.Instrumentation.SqlClient`, test SDK
+  and coverlet). These are not part of the shipped package.
diff --git a/src/OpenTelemetryExtension.Configuration.IntegrationTests/OpenTelemetryExtension.Configuration.IntegrationTests.csproj b/src/OpenTelemetryExtension.Configuration.IntegrationTests/OpenTelemetryExtension.Configuration.IntegrationTests.csproj
index a9d050e..bb12879 100644
--- a/src/OpenTelemetryExtension.Configuration.IntegrationTests/OpenTelemetryExtension.Configuration.IntegrationTests.csproj
+++ b/src/OpenTelemetryExtension.Configuration.IntegrationTests/OpenTelemetryExtension.Configuration.IntegrationTests.csproj
@@ -9,10 +9,10 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Data.SqlClient" Version="7.0.2" />
-    <PackageReference Include="Microsoft.Extensions.Hosting" Version="10.0.11" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.9.0" />
-    <PackageReference Include="OpenTelemetry.Instrumentation.SqlClient" Version="1.18.0" />
+    <PackageReference Include="Microsoft.Data.SqlClient" Version="7.1.0" />
+    <PackageReference Include="Microsoft.Extensions.Hosting" Version="10.0.12" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.10.1" />
+    <PackageReference Include="OpenTelemetry.Instrumentation.SqlClient" Version="1.19.0" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="4.0.0">
       <PrivateAssets>all</PrivateAssets>
diff --git a/src/OpenTelemetryExtension.Configuration.Sample.WebApi/OpenTelemetryExtension.Configuration.Sample.WebApi.csproj b/src/OpenTelemetryExtension.Configuration.Sample.WebApi/OpenTelemetryExtension.Configuration.Sample.WebApi.csproj
index 9e044f7..f08fb98 100644
--- a/src/OpenTelemetryExtension.Configuration.Sample.WebApi/OpenTelemetryExtension.Configuration.Sample.WebApi.csproj
+++ b/src/OpenTelemetryExtension.Configuration.Sample.WebApi/OpenTelemetryExtension.Configuration.Sample.WebApi.csproj
@@ -11,22 +11,22 @@
   </PropertyGroup>
 
   <ItemGroup>
-	  <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="10.0.11" />
-	  <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="10.0.11" />
-	  <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="10.0.11" />
-	  <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="10.0.11">
+	  <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="10.0.12" />
+	  <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="10.0.12" />
+	  <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="10.0.12" />
+	  <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="10.0.12">
 	    <PrivateAssets>all</PrivateAssets>
 	    <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
 	  </PackageReference>
-	  <PackageReference Include="Microsoft.Extensions.Http.Resilience" Version="10.9.0" />
-	  <PackageReference Include="Microsoft.Extensions.ServiceDiscovery" Version="10.9.0" />
-	  <PackageReference Include="NLog.Web.AspNetCore" Version="6.2.0" />
-	  <PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.18.0" />
-	  <PackageReference Include="OpenTelemetry.Extensions.Hosting" Version="1.18.0" />
-	  <PackageReference Include="OpenTelemetry.Instrumentation.AspNetCore" Version="1.18.0" />
-	  <PackageReference Include="OpenTelemetry.Instrumentation.Http" Version="1.18.0" />
-	  <PackageReference Include="OpenTelemetry.Instrumentation.Runtime" Version="1.18.0" />
-	  <PackageReference Include="OpenTelemetry.Instrumentation.SqlClient" Version="1.18.0" />
+	  <PackageReference Include="Microsoft.Extensions.Http.Resilience" Version="10.10.0" />
+	  <PackageReference Include="Microsoft.Extensions.ServiceDiscovery" Version="10.10.0" />
+	  <PackageReference Include="NLog.Web.AspNetCore" Version="6.2.1" />
+	  <PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.19.1" />
+	  <PackageReference Include="OpenTelemetry.Extensions.Hosting" Version="1.19.1" />
+	  <PackageReference Include="OpenTelemetry.Instrumentation.AspNetCore" Version="1.19.0" />
+	  <PackageReference Include="OpenTelemetry.Instrumentation.Http" Version="1.19.0" />
+	  <PackageReference Include="OpenTelemetry.Instrumentation.Runtime" Version="1.19.0" />
+	  <PackageReference Include="OpenTelemetry.Instrumentation.SqlClient" Version="1.19.0" />
 	  <PackageReference Include="Swashbuckle.AspNetCore" Version="10.2.3" />
   </ItemGroup>
 
diff --git a/src/OpenTelemetryExtension.Configuration.Sample.Wpf/OpenTelemetryExtension.Configuration.Sample.Wpf.csproj b/src/OpenTelemetryExtension.Configuration.Sample.Wpf/OpenTelemetryExtension.Configuration.Sample.Wpf.csproj
index 543bb96..742566e 100644
--- a/src/OpenTelemetryExtension.Configuration.Sample.Wpf/OpenTelemetryExtension.Configuration.Sample.Wpf.csproj
+++ b/src/OpenTelemetryExtension.Configuration.Sample.Wpf/OpenTelemetryExtension.Configuration.Sample.Wpf.csproj
@@ -11,7 +11,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.Hosting" Version="10.0.11" />
+    <PackageReference Include="Microsoft.Extensions.Hosting" Version="10.0.12" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/src/OpenTelemetryExtension.Configuration.Tests/OpenTelemetryExtension.Configuration.Tests.csproj b/src/OpenTelemetryExtension.Configuration.Tests/OpenTelemetryExtension.Configuration.Tests.csproj
index a18a404..ccf6b86 100644
--- a/src/OpenTelemetryExtension.Configuration.Tests/OpenTelemetryExtension.Configuration.Tests.csproj
+++ b/src/OpenTelemetryExtension.Configuration.Tests/OpenTelemetryExtension.Configuration.Tests.csproj
@@ -15,11 +15,11 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="coverlet.collector" Version="10.0.1">
+    <PackageReference Include="coverlet.collector" Version="10.1.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.9.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.10.1" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="4.0.0">
       <PrivateAssets>all</PrivateAssets>
diff --git a/src/OpenTelemetryExtension.Configuration/OpenTelemetryExtension.Configuration.csproj b/src/OpenTelemetryExtension.Configuration/OpenTelemetryExtension.Configuration.csproj
index 9d76793..bbc9393 100644
--- a/src/OpenTelemetryExtension.Configuration/OpenTelemetryExtension.Configuration.csproj
+++ b/src/OpenTelemetryExtension.Configuration/OpenTelemetryExtension.Configuration.csproj
@@ -2,7 +2,7 @@
 
 	<PropertyGroup>
 		<TargetFrameworks>netstandard2.0;net8.0;net10.0</TargetFrameworks>
-		<Version>2.1.4</Version>
+		<Version>2.1.5</Version>
 		<GeneratePackageOnBuild>false</GeneratePackageOnBuild>
 		<GenerateDocumentationFile>true</GenerateDocumentationFile>
 
@@ -26,16 +26,16 @@
 
 	<!-- Cross-platform packages: usable from any .NET app (ASP.NET Core, WPF, console, ...). -->
 	<ItemGroup>
-		<PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.18.0" />
-		<PackageReference Include="OpenTelemetry.Extensions.Hosting" Version="1.18.0" />
-		<PackageReference Include="OpenTelemetry.Instrumentation.Http" Version="1.18.0" />
-		<PackageReference Include="OpenTelemetry.Instrumentation.Runtime" Version="1.18.0" />
+		<PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.19.1" />
+		<PackageReference Include="OpenTelemetry.Extensions.Hosting" Version="1.19.1" />
+		<PackageReference Include="OpenTelemetry.Instrumentation.Http" Version="1.19.0" />
+		<PackageReference Include="OpenTelemetry.Instrumentation.Runtime" Version="1.19.0" />
 	</ItemGroup>
 
 	<!-- ASP.NET Core instrumentation is only pulled in for web-capable targets,
 	     so non-web clients (WPF, console) using the netstandard2.0 build stay lean. -->
 	<ItemGroup Condition="'$(TargetFramework)' != 'netstandard2.0'">
-		<PackageReference Include="OpenTelemetry.Instrumentation.AspNetCore" Version="1.18.0" />
+		<PackageReference Include="OpenTelemetry.Instrumentation.AspNetCore" Version="1.19.0" />
 	</ItemGroup>
 
 	<ItemGroup>