diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index cc178d01..86ec56e9 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -39,6 +39,11 @@ jobs:
     steps:
     - name: Checkout repository
       uses: actions/checkout@v4
+      
+    - name: Setup .NET 9
+      uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: 9.0.x
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
diff --git a/.github/workflows/dotnet.yml b/.github/workflows/dotnet.yml
index c643e47a..94859672 100644
--- a/.github/workflows/dotnet.yml
+++ b/.github/workflows/dotnet.yml
@@ -13,10 +13,14 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
-    - name: Setup .NET
+    - name: Setup .NET 8
       uses: actions/setup-dotnet@v1
       with:
         dotnet-version: 8.0.x
+    - name: Setup .NET 9
+      uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: 9.0.x
     - name: Restore dependencies
       run: dotnet restore
       env:
diff --git a/src/MiniExcel/MiniExcelLibs.csproj b/src/MiniExcel/MiniExcelLibs.csproj
index 7f3240b4..e749e802 100644
--- a/src/MiniExcel/MiniExcelLibs.csproj
+++ b/src/MiniExcel/MiniExcelLibs.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
 	<PropertyGroup>
-		<TargetFrameworks>net45;netstandard2.0;net8.0;</TargetFrameworks>
+		<TargetFrameworks>net45;netstandard2.0;net8.0;net9.0</TargetFrameworks>
 		<Version>1.39.0</Version>
 	</PropertyGroup>
 	<PropertyGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">