diff --git a/src/Chapter01.Tests/Chapter01.Tests.csproj b/src/Chapter01.Tests/Chapter01.Tests.csproj
index f0f258f3e..09eb0cb4f 100644
--- a/src/Chapter01.Tests/Chapter01.Tests.csproj
+++ b/src/Chapter01.Tests/Chapter01.Tests.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
       <ChapterNumber>01</ChapterNumber>
   </PropertyGroup>
@@ -10,7 +10,7 @@
     <ProjectReference Include="..\Chapter01\Chapter01.csproj" />
   </ItemGroup>
   <ItemGroup>
-      <PackageReference Include="IntelliTect.Multitool" Version="1.3.0" />
+      <PackageReference Include="IntelliTect.Multitool" Version="1.3.1" />
       <PackageReference Update="coverlet.collector" Version="3.2.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
diff --git a/src/Chapter10.Tests/Chapter10.Tests.csproj b/src/Chapter10.Tests/Chapter10.Tests.csproj
index f1389c825..b02d712ed 100644
--- a/src/Chapter10.Tests/Chapter10.Tests.csproj
+++ b/src/Chapter10.Tests/Chapter10.Tests.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <ProductName>Chapter10.Tests</ProductName>
   </PropertyGroup>
@@ -10,7 +10,7 @@
     <ProjectReference Include="..\Chapter10\Chapter10.csproj" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="IntelliTect.Multitool" Version="1.3.0" />
+    <PackageReference Include="IntelliTect.Multitool" Version="1.3.1" />
     <PackageReference Update="coverlet.collector" Version="3.2.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>