diff --git a/ShapeSifter/ShapeSifter.fsproj b/ShapeSifter/ShapeSifter.fsproj
index e33c2c1..888018b 100644
--- a/ShapeSifter/ShapeSifter.fsproj
+++ b/ShapeSifter/ShapeSifter.fsproj
@@ -45,7 +45,7 @@
 
   <ItemGroup>
     <PackageReference Update="FSharp.Core" Version="4.5.0" />
-    <PackageReference Include="HeterogeneousCollections" Version="1.1.3" />
+    <PackageReference Include="HeterogeneousCollections" Version="1.1.4" />
   </ItemGroup>
 
 </Project>