diff --git a/src/TestableHttpClient/TestableHttpClient.csproj b/src/TestableHttpClient/TestableHttpClient.csproj
index 35bea58e..f4e53fd6 100644
--- a/src/TestableHttpClient/TestableHttpClient.csproj
+++ b/src/TestableHttpClient/TestableHttpClient.csproj
@@ -32,8 +32,8 @@
   </PropertyGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
-    <PackageReference Include="System.Text.Json" Version="4.7.2" />
-    <PackageReference Include="System.Text.Encodings.Web" Version="4.7.2" />
+    <PackageReference Include="System.Text.Json" Version="10.0.0" />
+    <PackageReference Include="System.Text.Encodings.Web" Version="10.0.0" />
     <PackageReference Include="Perfors.UnreachableException" Version="1.0.0" />
     <PackageReference Include="PolyKit.Embedded" Version="3.0.9" />
   </ItemGroup>
diff --git a/test/TestableHttpClient.IntegrationTests/TestableHttpClient.IntegrationTests.csproj b/test/TestableHttpClient.IntegrationTests/TestableHttpClient.IntegrationTests.csproj
index 7b87905c..af43a360 100644
--- a/test/TestableHttpClient.IntegrationTests/TestableHttpClient.IntegrationTests.csproj
+++ b/test/TestableHttpClient.IntegrationTests/TestableHttpClient.IntegrationTests.csproj
@@ -7,7 +7,7 @@
 
   <ItemGroup Condition="'$(TargetFrameworkIdentifier)' == '.NETFramework'">
     <PackageReference Include="System.Net.Http" Version="4.3.4" />
-    <PackageReference Include="System.Net.Http.Json" Version="[8.0.*,)" />
+    <PackageReference Include="System.Net.Http.Json" Version="10.0.0" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'net8.0'">
diff --git a/test/TestableHttpClient.Tests/TestableHttpClient.Tests.csproj b/test/TestableHttpClient.Tests/TestableHttpClient.Tests.csproj
index 62c2a354..11288997 100644
--- a/test/TestableHttpClient.Tests/TestableHttpClient.Tests.csproj
+++ b/test/TestableHttpClient.Tests/TestableHttpClient.Tests.csproj
@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup Condition="'$(TargetFrameworkIdentifier)' == '.NETFramework'">
-    <PackageReference Include="System.Net.Http.Json" Version="8.0.1" />
+    <PackageReference Include="System.Net.Http.Json" Version="10.0.0" />
   </ItemGroup>
 
   <ItemGroup>