diff --git a/Oproto.Lambda.OpenApi.SourceGenerator/Oproto.Lambda.OpenApi.SourceGenerator.csproj b/Oproto.Lambda.OpenApi.SourceGenerator/Oproto.Lambda.OpenApi.SourceGenerator.csproj
index 5c97a17..aabeb21 100644
--- a/Oproto.Lambda.OpenApi.SourceGenerator/Oproto.Lambda.OpenApi.SourceGenerator.csproj
+++ b/Oproto.Lambda.OpenApi.SourceGenerator/Oproto.Lambda.OpenApi.SourceGenerator.csproj
@@ -57,8 +57,8 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.8.0" PrivateAssets="all"/>
-    <PackageReference Include="Microsoft.OpenApi" Version="1.6.22" PrivateAssets="all" GeneratePathProperty="true"/>
-    <PackageReference Include="System.Text.Json" Version="8.0.0"/>
+    <PackageReference Include="Microsoft.OpenApi" Version="3.0.2" PrivateAssets="all" GeneratePathProperty="true"/>
+    <PackageReference Include="System.Text.Json" Version="8.0.5"/>
   </ItemGroup>
 
   <!-- Copy Microsoft.OpenApi.dll to output for project reference scenarios -->
diff --git a/Oproto.Lambda.OpenApi.Tests/Oproto.Lambda.OpenApi.Tests.csproj b/Oproto.Lambda.OpenApi.Tests/Oproto.Lambda.OpenApi.Tests.csproj
index 2f6f782..6d9e8f6 100644
--- a/Oproto.Lambda.OpenApi.Tests/Oproto.Lambda.OpenApi.Tests.csproj
+++ b/Oproto.Lambda.OpenApi.Tests/Oproto.Lambda.OpenApi.Tests.csproj
@@ -14,8 +14,8 @@
         <PackageReference Include="Microsoft.Build.Framework" Version="17.8.3"/>
         <PackageReference Include="Microsoft.Build.Utilities.Core" Version="17.8.3"/>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.0"/>
-        <PackageReference Include="Microsoft.OpenApi" Version="1.6.22"/>
-        <PackageReference Include="Microsoft.OpenApi.Readers" Version="1.6.22"/>
+        <PackageReference Include="Microsoft.OpenApi" Version="3.0.2"/>
+        <PackageReference Include="Microsoft.OpenApi.Readers" Version="1.6.28"/>
         <PackageReference Include="NSubstitute" Version="5.3.0"/>
         <PackageReference Include="xunit" Version="2.4.2"/>
         <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">