diff --git a/src/Crumbs.EventualConsistency/Crumbs.EventualConsistency.csproj b/src/Crumbs.EventualConsistency/Crumbs.EventualConsistency.csproj
index fcda7e1..8d2605e 100644
--- a/src/Crumbs.EventualConsistency/Crumbs.EventualConsistency.csproj
+++ b/src/Crumbs.EventualConsistency/Crumbs.EventualConsistency.csproj
@@ -14,7 +14,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="System.Reactive" Version="4.1.5" />
+    <PackageReference Include="System.Reactive" Version="4.4.1" />
   </ItemGroup>
 
   <ItemGroup>