diff --git a/MinimalEvents/MinimalEvents.csproj b/MinimalEvents/MinimalEvents.csproj
index f8c46d9..faae2fa 100644
--- a/MinimalEvents/MinimalEvents.csproj
+++ b/MinimalEvents/MinimalEvents.csproj
@@ -33,7 +33,7 @@
     </ItemGroup>
 
     <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.1'">
-        <PackageReference Include="System.Collections.Immutable" Version="9.0.10" />
+        <PackageReference Include="System.Collections.Immutable" Version="10.0.1" />
     </ItemGroup>
 
     <ItemGroup>