diff --git a/docs/release-notes.md b/docs/release-notes.md
index ea459bcb..04874729 100644
--- a/docs/release-notes.md
+++ b/docs/release-notes.md
@@ -11,6 +11,9 @@
 * For players:
   * Fixed update alert shown for a prerelease version on GitHub if it's not marked as prerelease.
 
+* For mod authors:
+  * Updated to [FluentHttpClient](https://github.com/Pathoschild/FluentHttpClient#readme) 4.2.0 (see [changes](https://github.com/Pathoschild/FluentHttpClient/blob/develop/RELEASE-NOTES.md#420)).
+
 ## 3.16.2
 Released 31 August 2022 for Stardew Valley 1.5.6 or later.
 
diff --git a/src/SMAPI.Toolkit/SMAPI.Toolkit.csproj b/src/SMAPI.Toolkit/SMAPI.Toolkit.csproj
index 7b79105f..bd4f4e3d 100644
--- a/src/SMAPI.Toolkit/SMAPI.Toolkit.csproj
+++ b/src/SMAPI.Toolkit/SMAPI.Toolkit.csproj
@@ -11,7 +11,7 @@
   <ItemGroup>
     <PackageReference Include="HtmlAgilityPack" Version="1.11.43" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
-    <PackageReference Include="Pathoschild.Http.FluentClient" Version="4.1.1" />
+    <PackageReference Include="Pathoschild.Http.FluentClient" Version="4.2.0" />
     <PackageReference Include="System.Management" Version="5.0.0" Condition="'$(OS)' == 'Windows_NT'" />
     <PackageReference Include="Microsoft.Win32.Registry" Version="5.0.0" Condition="'$(OS)' == 'Windows_NT'" />
   </ItemGroup>
diff --git a/src/SMAPI.Web/SMAPI.Web.csproj b/src/SMAPI.Web/SMAPI.Web.csproj
index d26cb6f8..81b187fe 100644
--- a/src/SMAPI.Web/SMAPI.Web.csproj
+++ b/src/SMAPI.Web/SMAPI.Web.csproj
@@ -25,7 +25,7 @@
     <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="6.0.5" />
     <PackageReference Include="Newtonsoft.Json.Schema" Version="3.0.14" />
     <PackageReference Include="Pathoschild.FluentNexus" Version="1.0.5" />
-    <PackageReference Include="Pathoschild.Http.FluentClient" Version="4.1.1" />
+    <PackageReference Include="Pathoschild.Http.FluentClient" Version="4.2.0" />
   </ItemGroup>
   <ItemGroup>
     <DotNetCliToolReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Tools" Version="1.0.1" />
diff --git a/src/SMAPI/SMAPI.csproj b/src/SMAPI/SMAPI.csproj
index 36db0545..e5d8937c 100644
--- a/src/SMAPI/SMAPI.csproj
+++ b/src/SMAPI/SMAPI.csproj
@@ -26,7 +26,7 @@
     <PackageReference Include="Mono.Cecil" Version="0.11.4" />
     <PackageReference Include="MonoMod.Common" Version="22.3.5.1" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
-    <PackageReference Include="Pathoschild.Http.FluentClient" Version="4.1.1" />
+    <PackageReference Include="Pathoschild.Http.FluentClient" Version="4.2.0" />
     <PackageReference Include="Pintail" Version="2.2.1" />
     <PackageReference Include="Platonymous.TMXTile" Version="1.5.9" />
     <PackageReference Include="System.Reflection.Emit" Version="4.7.0" />