diff --git a/ChallengesWithTestsMark8.Tests/ChallengesWithTestsMark8.Tests.csproj b/ChallengesWithTestsMark8.Tests/ChallengesWithTestsMark8.Tests.csproj
index 31f6d18fd..ccdcca2a0 100644
--- a/ChallengesWithTestsMark8.Tests/ChallengesWithTestsMark8.Tests.csproj
+++ b/ChallengesWithTestsMark8.Tests/ChallengesWithTestsMark8.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
 
     <IsPackable>false</IsPackable>
   </PropertyGroup>
diff --git a/ChallengesWithTestsMark8/ChallengesWithTestsMark8.csproj b/ChallengesWithTestsMark8/ChallengesWithTestsMark8.csproj
index ddb344e65..8535b48c2 100644
--- a/ChallengesWithTestsMark8/ChallengesWithTestsMark8.csproj
+++ b/ChallengesWithTestsMark8/ChallengesWithTestsMark8.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
   </PropertyGroup>
 
 </Project>