diff --git a/src/Microsoft.OpenApi.Readers/Microsoft.OpenApi.Readers.csproj b/src/Microsoft.OpenApi.Readers/Microsoft.OpenApi.Readers.csproj
index 79d1d70f7..55e63a81c 100644
--- a/src/Microsoft.OpenApi.Readers/Microsoft.OpenApi.Readers.csproj
+++ b/src/Microsoft.OpenApi.Readers/Microsoft.OpenApi.Readers.csproj
@@ -10,7 +10,7 @@
         <Company>Microsoft</Company>
         <Title>Microsoft.OpenApi.Readers</Title>
         <PackageId>Microsoft.OpenApi.Readers</PackageId>
-        <Version>1.1.0-preview.3</Version>
+        <Version>1.1.0-preview.4</Version>
         <Description>OpenAPI.NET Readers for JSON and YAML documents</Description>
         <Copyright>© Microsoft Corporation. All rights reserved.</Copyright>
         <PackageTags>OpenAPI .NET</PackageTags>
diff --git a/src/Microsoft.OpenApi/Microsoft.OpenApi.csproj b/src/Microsoft.OpenApi/Microsoft.OpenApi.csproj
index a22ed77cd..dda236652 100644
--- a/src/Microsoft.OpenApi/Microsoft.OpenApi.csproj
+++ b/src/Microsoft.OpenApi/Microsoft.OpenApi.csproj
@@ -10,7 +10,7 @@
         <Company>Microsoft</Company>
         <Title>Microsoft.OpenApi</Title>
         <PackageId>Microsoft.OpenApi</PackageId>
-        <Version>1.1.0-preview.3</Version>
+        <Version>1.1.0-preview.4</Version>
         <Description>.NET models with JSON and YAML writers for OpenAPI specification</Description>
         <Copyright>© Microsoft Corporation. All rights reserved.</Copyright>
         <PackageTags>OpenAPI .NET</PackageTags>