diff --git a/src/IbanNet.CodeGen/IbanNet.CodeGen.csproj b/src/IbanNet.CodeGen/IbanNet.CodeGen.csproj
index 84916390..0c9dfd95 100644
--- a/src/IbanNet.CodeGen/IbanNet.CodeGen.csproj
+++ b/src/IbanNet.CodeGen/IbanNet.CodeGen.csproj
@@ -23,7 +23,7 @@
   <ItemGroup>
     <PackageReference Include="CsvHelper" Version="33.0.1" />
     <PackageReference Include="HtmlAgilityPack" Version="1.12.1" />
-    <PackageReference Include="System.Text.Json" Version="8.0.5" />
+    <PackageReference Include="System.Text.Json" Version="9.0.15" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/src/IbanNet/IbanNet.csproj b/src/IbanNet/IbanNet.csproj
index efdb3236..a5bd2643 100644
--- a/src/IbanNet/IbanNet.csproj
+++ b/src/IbanNet/IbanNet.csproj
@@ -26,7 +26,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="System.Text.Json" Version="6.0.10" Condition="'$(TargetFramework)'=='netstandard2.1'" />
+    <PackageReference Include="System.Text.Json" Version="9.0.15" Condition="'$(TargetFramework)'=='netstandard2.1'" />
   </ItemGroup>
 
   <ItemGroup>