diff --git a/CHANGELOG.md b/CHANGELOG.md
index 463d518..e3d59ce 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,12 +16,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 - Usage of AdditionalSolverParmateters. Changed list of string to list of key-value pairs.
 
-## [2.8.0] - 2026-07-10
-
-### Added
-
-- Update Version of Google OR Tools to 9.15.
-
 ## [2.7.0] - 2025-11-10
 
 ### Added
diff --git a/examples/Anexia.MathematicalProgram.Examples/Anexia.MathematicalProgram.Examples.csproj b/examples/Anexia.MathematicalProgram.Examples/Anexia.MathematicalProgram.Examples.csproj
index d5238f3..dfd29d8 100644
--- a/examples/Anexia.MathematicalProgram.Examples/Anexia.MathematicalProgram.Examples.csproj
+++ b/examples/Anexia.MathematicalProgram.Examples/Anexia.MathematicalProgram.Examples.csproj
@@ -14,7 +14,7 @@
     </ItemGroup>
 
     <ItemGroup>
-        <PackageReference Update="Google.OrTools" Version="9.15.6755" />
+        <PackageReference Update="Google.OrTools" Version="9.14.6206" />
         <PackageReference Include="Microsoft.Extensions.Logging" Version="9.0.6" />
         <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="9.0.6" />
         <PackageReference Include="Serilog" Version="4.3.0" />
diff --git a/src/Anexia.MathematicalProgram/Anexia.MathematicalProgram.csproj b/src/Anexia.MathematicalProgram/Anexia.MathematicalProgram.csproj
index 6274fa3..733f992 100644
--- a/src/Anexia.MathematicalProgram/Anexia.MathematicalProgram.csproj
+++ b/src/Anexia.MathematicalProgram/Anexia.MathematicalProgram.csproj
@@ -23,7 +23,7 @@
 
     <ItemGroup>
       <PackageReference Include="Gurobi.Optimizer" Version="13.0.2" />
-      <PackageReference Update="Google.OrTools" Version="9.15.6755" />
+      <PackageReference Update="Google.OrTools" Version="9.14.6206" />
       <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="9.0.6" />
     </ItemGroup>
 
diff --git a/test/Anexia.MathematicalProgram.Tests/Anexia.MathematicalProgram.Tests.csproj b/test/Anexia.MathematicalProgram.Tests/Anexia.MathematicalProgram.Tests.csproj
index 727d890..cb975a5 100644
--- a/test/Anexia.MathematicalProgram.Tests/Anexia.MathematicalProgram.Tests.csproj
+++ b/test/Anexia.MathematicalProgram.Tests/Anexia.MathematicalProgram.Tests.csproj
@@ -15,7 +15,7 @@
     </ItemGroup>
 
     <ItemGroup>
-      <PackageReference Update="Google.OrTools" Version="9.15.6755" />
+      <PackageReference Update="Google.OrTools" Version="9.14.6206" />
       <PackageReference Include="Serilog" Version="4.3.0" />
       <PackageReference Include="Serilog.Extensions.Logging" Version="9.0.2" />
       <PackageReference Include="Serilog.Sinks.File" Version="7.0.0" />