diff --git a/samples/Metrics/ServiceDefaults/ServiceDefaults.csproj b/samples/Metrics/ServiceDefaults/ServiceDefaults.csproj
index 12383a32..05fb21e6 100644
--- a/samples/Metrics/ServiceDefaults/ServiceDefaults.csproj
+++ b/samples/Metrics/ServiceDefaults/ServiceDefaults.csproj
@@ -9,7 +9,7 @@
     <FrameworkReference Include="Microsoft.AspNetCore.App" />
 
     <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="10.0.10" />
-    <PackageReference Include="Microsoft.OpenApi" Version="2.11.0" />
+    <PackageReference Include="Microsoft.OpenApi" Version="3.9.0" />
     <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="10.0.10" />
     <PackageReference Include="Microsoft.Extensions.Http.Resilience" Version="10.8.0" />
     <PackageReference Include="Microsoft.Extensions.ServiceDiscovery" Version="10.8.0" />
diff --git a/samples/aspire-shop/AspireShop.CatalogService/AspireShop.CatalogService.csproj b/samples/aspire-shop/AspireShop.CatalogService/AspireShop.CatalogService.csproj
index 423ce1d9..b5085928 100644
--- a/samples/aspire-shop/AspireShop.CatalogService/AspireShop.CatalogService.csproj
+++ b/samples/aspire-shop/AspireShop.CatalogService/AspireShop.CatalogService.csproj
@@ -13,7 +13,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="10.0.10" />
-    <PackageReference Include="Microsoft.OpenApi" Version="2.11.0" />
+    <PackageReference Include="Microsoft.OpenApi" Version="3.9.0" />
     <PackageReference Include="Scalar.AspNetCore" Version="2.16.16" />
   </ItemGroup>
 
diff --git a/samples/aspire-with-javascript/AspireJavaScript.MinimalApi/AspireJavaScript.MinimalApi.csproj b/samples/aspire-with-javascript/AspireJavaScript.MinimalApi/AspireJavaScript.MinimalApi.csproj
index 3e4202a0..538373af 100644
--- a/samples/aspire-with-javascript/AspireJavaScript.MinimalApi/AspireJavaScript.MinimalApi.csproj
+++ b/samples/aspire-with-javascript/AspireJavaScript.MinimalApi/AspireJavaScript.MinimalApi.csproj
@@ -9,7 +9,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="10.0.10" />
-    <PackageReference Include="Microsoft.OpenApi" Version="2.11.0" />
+    <PackageReference Include="Microsoft.OpenApi" Version="3.9.0" />
     <PackageReference Include="Scalar.AspNetCore" Version="2.16.16" />
   </ItemGroup>
 
diff --git a/samples/database-containers/DatabaseContainers.ApiService/DatabaseContainers.ApiService.csproj b/samples/database-containers/DatabaseContainers.ApiService/DatabaseContainers.ApiService.csproj
index fcb07736..b8f2aa87 100644
--- a/samples/database-containers/DatabaseContainers.ApiService/DatabaseContainers.ApiService.csproj
+++ b/samples/database-containers/DatabaseContainers.ApiService/DatabaseContainers.ApiService.csproj
@@ -17,7 +17,7 @@
     <PackageReference Include="Aspire.MySqlConnector" Version="13.4.6" />
     <PackageReference Include="Dapper" Version="2.1.79" />
     <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="10.0.10" />
-    <PackageReference Include="Microsoft.OpenApi" Version="2.11.0" />
+    <PackageReference Include="Microsoft.OpenApi" Version="3.9.0" />
     <PackageReference Include="Scalar.AspNetCore" Version="2.16.16" />
   </ItemGroup>