diff --git a/src/Fluss.PostgreSQL.IntegrationTest/Fluss.PostgreSQL.IntegrationTest.csproj b/src/Fluss.PostgreSQL.IntegrationTest/Fluss.PostgreSQL.IntegrationTest.csproj
index f55454d..7207906 100644
--- a/src/Fluss.PostgreSQL.IntegrationTest/Fluss.PostgreSQL.IntegrationTest.csproj
+++ b/src/Fluss.PostgreSQL.IntegrationTest/Fluss.PostgreSQL.IntegrationTest.csproj
@@ -10,7 +10,7 @@
     <ItemGroup>
         <PackageReference Include="coverlet.collector" Version="6.0.2"/>
         <PackageReference Include="Microsoft.Extensions.Configuration" Version="9.0.0"/>
-        <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="8.0.0"/>
+        <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="9.0.0"/>
         <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="8.0.0"/>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0"/>
         <PackageReference Include="Npgsql" Version="9.0.2"/>