diff --git a/tests/JsonLexAndYaccExample/JsonLexAndYaccExample.fsproj b/tests/JsonLexAndYaccExample/JsonLexAndYaccExample.fsproj
index 356a643..a1127b0 100644
--- a/tests/JsonLexAndYaccExample/JsonLexAndYaccExample.fsproj
+++ b/tests/JsonLexAndYaccExample/JsonLexAndYaccExample.fsproj
@@ -23,7 +23,7 @@
     </None>
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Update="FSharp.Core" Version="4.7.1" />
+    <PackageReference Update="FSharp.Core" Version="8.0.101" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\..\src\FsLexYacc.Runtime\FsLexYacc.Runtime.fsproj" />
diff --git a/tests/LexAndYaccMiniProject/LexAndYaccMiniProject.fsproj b/tests/LexAndYaccMiniProject/LexAndYaccMiniProject.fsproj
index 90bb7d9..3158956 100644
--- a/tests/LexAndYaccMiniProject/LexAndYaccMiniProject.fsproj
+++ b/tests/LexAndYaccMiniProject/LexAndYaccMiniProject.fsproj
@@ -19,7 +19,7 @@
     <Compile Include="Program.fs" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Update="FSharp.Core" Version="4.7.1" />
+    <PackageReference Update="FSharp.Core" Version="8.0.101" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\..\src\FsLexYacc.Runtime\FsLexYacc.Runtime.fsproj" />