diff --git a/OpenApiWithAzureFunctions.OpenApi/OpenApiWithAzureFunctions.OpenApi.csproj b/OpenApiWithAzureFunctions.OpenApi/OpenApiWithAzureFunctions.OpenApi.csproj
index 1545160..c88225a 100644
--- a/OpenApiWithAzureFunctions.OpenApi/OpenApiWithAzureFunctions.OpenApi.csproj
+++ b/OpenApiWithAzureFunctions.OpenApi/OpenApiWithAzureFunctions.OpenApi.csproj
@@ -7,7 +7,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.OpenApi" Version="1.2.3" />
-    <PackageReference Include="Microsoft.OpenApi.Readers" Version="1.2.3" />
+    <PackageReference Include="Microsoft.OpenApi.Readers" Version="1.4.0" />
   </ItemGroup>
 
 </Project>