diff --git a/src/OoasGui/OoasGui.csproj b/src/OoasGui/OoasGui.csproj
index dda35550..0fc55880 100644
--- a/src/OoasGui/OoasGui.csproj
+++ b/src/OoasGui/OoasGui.csproj
@@ -17,7 +17,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
     <PackageReference Include="Microsoft.OData.Edm" Version="7.12.2" />
-    <PackageReference Include="Microsoft.OpenApi" Version="1.3.2" />
+    <PackageReference Include="Microsoft.OpenApi" Version="1.4.0" />
     <PackageReference Include="System.Data.DataSetExtensions" Version="4.5.0" />
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/tool/UpdateDocs/UpdateDocs.csproj b/tool/UpdateDocs/UpdateDocs.csproj
index 61ee8667..366d6961 100644
--- a/tool/UpdateDocs/UpdateDocs.csproj
+++ b/tool/UpdateDocs/UpdateDocs.csproj
@@ -13,6 +13,6 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.OData.Edm" Version="7.12.2" />
-    <PackageReference Include="Microsoft.OpenApi" Version="1.3.2" />
+    <PackageReference Include="Microsoft.OpenApi" Version="1.4.0" />
   </ItemGroup>
 </Project>
\ No newline at end of file