diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3862cd90c6..deae6284e5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+## [1.9.1] - 2023-12-13
+
+### Added
+
+### Changed
+
 - Fixed a regression introduced by [#3760](https://github.com/microsoft/kiota/issues/3760) in 1.9.0 and its previews where indexer parameter name would be wrong leading to invalid URLs. [#3901](https://github.com/microsoft/kiota/issues/3901)
 - Fixed a bug in the vscode extension where the "Paste API Manifest" button would not be able to parse the manifest.
 - Enhance the way Enums are expressed in Typescript. [#2105](https://github.com/microsoft/kiota/issues/2105)
@@ -1194,3 +1200,4 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Initial GitHub release
 
+
diff --git a/src/Kiota.Builder/Kiota.Builder.csproj b/src/Kiota.Builder/Kiota.Builder.csproj
index a12181b776..3f8d773347 100644
--- a/src/Kiota.Builder/Kiota.Builder.csproj
+++ b/src/Kiota.Builder/Kiota.Builder.csproj
@@ -15,7 +15,7 @@
     <Title>Microsoft.OpenApi.Kiota.Builder</Title>
     <PackageId>Microsoft.OpenApi.Kiota.Builder</PackageId>
     <PackageOutputPath>./nupkg</PackageOutputPath>
-    <VersionPrefix>1.10.0</VersionPrefix>
+    <VersionPrefix>1.9.1</VersionPrefix>
     <VersionSuffix>$(VersionSuffix)</VersionSuffix>
     <PackageReleaseNotes>
       https://github.com/microsoft/kiota/releases
@@ -49,7 +49,8 @@
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="All" />
     <PackageReference Include="NeoSmart.AsyncLock" Version="3.2.1" />
     <PackageReference Include="YamlDotNet" Version="13.7.1" />
-    <ProjectReference Include="..\Kiota.Generated\KiotaGenerated.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false" />
+    <ProjectReference Include="..\Kiota.Generated\KiotaGenerated.csproj" OutputItemType="Analyzer"
+      ReferenceOutputAssembly="false" />
   </ItemGroup>
   <ItemGroup>
     <AdditionalFiles Include="*.g.cs" />
@@ -57,4 +58,4 @@
   <ItemGroup>
     <None Include="../../README.md" Pack="true" PackagePath="" />
   </ItemGroup>
-</Project>
+</Project>
\ No newline at end of file
diff --git a/src/kiota/kiota.csproj b/src/kiota/kiota.csproj
index 9bf17ec7c0..b377a8e5e3 100644
--- a/src/kiota/kiota.csproj
+++ b/src/kiota/kiota.csproj
@@ -15,7 +15,7 @@
     <Title>Microsoft.OpenApi.Kiota</Title>
     <PackageId>Microsoft.OpenApi.Kiota</PackageId>
     <PackageOutputPath>./nupkg</PackageOutputPath>
-    <VersionPrefix>1.10.0</VersionPrefix>
+    <VersionPrefix>1.9.1</VersionPrefix>
     <VersionSuffix>$(VersionSuffix)</VersionSuffix>
     <PackageReleaseNotes>
       https://github.com/microsoft/kiota/releases
@@ -40,7 +40,8 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="8.0.0" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="8.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="8.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables"
+      Version="8.0.0" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="8.0.0" />
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="8.0.0" />
     <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="8.0.0" />
@@ -50,7 +51,8 @@
     <PackageReference Include="System.CommandLine" Version="2.0.0-beta4.22272.1" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="All" />
     <PackageReference Include="System.CommandLine.Rendering" Version="0.4.0-alpha.22272.1" />
-    <ProjectReference Include="..\Kiota.Generated\KiotaGenerated.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false" />
+    <ProjectReference Include="..\Kiota.Generated\KiotaGenerated.csproj" OutputItemType="Analyzer"
+      ReferenceOutputAssembly="false" />
   </ItemGroup>
   <ItemGroup>
     <None Include="../../README.md" Pack="true" PackagePath="" />
@@ -60,4 +62,4 @@
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>
   </ItemGroup>
-</Project>
+</Project>
\ No newline at end of file