diff --git a/osu.Android.props b/osu.Android.props
index 5cf59decec..1131203a95 100644
--- a/osu.Android.props
+++ b/osu.Android.props
@@ -51,8 +51,8 @@
     <Reference Include="Java.Interop" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="ppy.osu.Game.Resources" Version="2021.1203.0" />
-    <PackageReference Include="ppy.osu.Framework.Android" Version="2021.1210.0" />
+    <PackageReference Include="ppy.osu.Game.Resources" Version="2021.1215.0" />
+    <PackageReference Include="ppy.osu.Framework.Android" Version="2021.1215.0" />
   </ItemGroup>
   <ItemGroup Label="Transitive Dependencies">
     <!-- Realm needs to be directly referenced in all Xamarin projects, as it will not pull in its transitive dependencies otherwise. -->
diff --git a/osu.Game/Graphics/UserInterface/OsuNumberBox.cs b/osu.Game/Graphics/UserInterface/OsuNumberBox.cs
index 36288c745a..3d565a4464 100644
--- a/osu.Game/Graphics/UserInterface/OsuNumberBox.cs
+++ b/osu.Game/Graphics/UserInterface/OsuNumberBox.cs
@@ -1,10 +1,12 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using osu.Framework.Extensions;
+
 namespace osu.Game.Graphics.UserInterface
 {
     public class OsuNumberBox : OsuTextBox
     {
-        protected override bool CanAddCharacter(char character) => char.IsNumber(character);
+        protected override bool CanAddCharacter(char character) => character.IsAsciiDigit();
     }
 }
diff --git a/osu.Game/Overlays/Settings/SettingsNumberBox.cs b/osu.Game/Overlays/Settings/SettingsNumberBox.cs
index cbe9f7fc64..cc4446033a 100644
--- a/osu.Game/Overlays/Settings/SettingsNumberBox.cs
+++ b/osu.Game/Overlays/Settings/SettingsNumberBox.cs
@@ -2,6 +2,7 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using osu.Framework.Bindables;
+using osu.Framework.Extensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.UserInterface;
@@ -67,7 +68,7 @@ namespace osu.Game.Overlays.Settings
 
         private class OutlinedNumberBox : OutlinedTextBox
         {
-            protected override bool CanAddCharacter(char character) => char.IsNumber(character);
+            protected override bool CanAddCharacter(char character) => character.IsAsciiDigit();
 
             public new void NotifyInputError() => base.NotifyInputError();
         }
diff --git a/osu.Game/osu.Game.csproj b/osu.Game/osu.Game.csproj
index 46064e320b..feae990df7 100644
--- a/osu.Game/osu.Game.csproj
+++ b/osu.Game/osu.Game.csproj
@@ -36,8 +36,8 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Realm" Version="10.7.1" />
-    <PackageReference Include="ppy.osu.Framework" Version="2021.1210.0" />
-    <PackageReference Include="ppy.osu.Game.Resources" Version="2021.1203.0" />
+    <PackageReference Include="ppy.osu.Framework" Version="2021.1215.0" />
+    <PackageReference Include="ppy.osu.Game.Resources" Version="2021.1215.0" />
     <PackageReference Include="Sentry" Version="3.12.1" />
     <PackageReference Include="SharpCompress" Version="0.30.1" />
     <PackageReference Include="NUnit" Version="3.13.2" />
diff --git a/osu.iOS.props b/osu.iOS.props
index fdb63a19d3..27ac1bf647 100644
--- a/osu.iOS.props
+++ b/osu.iOS.props
@@ -60,8 +60,8 @@
     <Reference Include="System.Net.Http" />
   </ItemGroup>
   <ItemGroup Label="Package References">
-    <PackageReference Include="ppy.osu.Framework.iOS" Version="2021.1210.0" />
-    <PackageReference Include="ppy.osu.Game.Resources" Version="2021.1203.0" />
+    <PackageReference Include="ppy.osu.Framework.iOS" Version="2021.1215.0" />
+    <PackageReference Include="ppy.osu.Game.Resources" Version="2021.1215.0" />
   </ItemGroup>
   <!-- See https://github.com/dotnet/runtime/issues/35988 (can be removed after Xamarin uses net5.0 / net6.0) -->
   <PropertyGroup>
@@ -83,7 +83,7 @@
     <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="2.2.6" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite.Core" Version="2.2.6" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
-    <PackageReference Include="ppy.osu.Framework" Version="2021.1210.0" />
+    <PackageReference Include="ppy.osu.Framework" Version="2021.1215.0" />
     <PackageReference Include="SharpCompress" Version="0.30.0" />
     <PackageReference Include="NUnit" Version="3.13.2" />
     <PackageReference Include="SharpRaven" Version="2.4.0" />