diff --git a/samples/Infrastructure/Services.fs b/samples/Infrastructure/Services.fs
index 901af7463..774c55e4b 100644
--- a/samples/Infrastructure/Services.fs
+++ b/samples/Infrastructure/Services.fs
@@ -17,7 +17,7 @@ type Store(store) =
             MemoryStore.MemoryStoreCategory(store, name, codec, fold, initial)
         | Store.Config.Cosmos (store, caching, unfolds) ->
             let accessStrategy = if unfolds then CosmosStore.AccessStrategy.Snapshot snapshot else CosmosStore.AccessStrategy.Unoptimized
-            CosmosStore.CosmosStoreCategory<'event,'state,_>(store, name, FsCodec.SystemTextJson.Encoding.EncodeTryCompress codec, fold, initial, accessStrategy, caching)
+            CosmosStore.CosmosStoreCategory<'event,'state,_>(store, name, FsCodec.SystemTextJson.Encoding.EncodeTryCompressUtf8 codec, fold, initial, accessStrategy, caching)
         | Store.Config.Dynamo (store, caching, unfolds) ->
             let accessStrategy = if unfolds then DynamoStore.AccessStrategy.Snapshot snapshot else DynamoStore.AccessStrategy.Unoptimized
             DynamoStore.DynamoStoreCategory<'event,'state,_>(store, name, FsCodec.Compression.EncodeTryCompress codec, fold, initial, accessStrategy, caching)
diff --git a/samples/Store/Domain/Domain.fsproj b/samples/Store/Domain/Domain.fsproj
index 873a9f768..53f6cbc39 100644
--- a/samples/Store/Domain/Domain.fsproj
+++ b/samples/Store/Domain/Domain.fsproj
@@ -19,7 +19,7 @@
     <PackageReference Include="FSharp.Core" Version="6.0.7" ExcludeAssets="contentfiles" />
 
     <PackageReference Include="FsCodec.NewtonsoftJson" Version="3.0.0" />
-    <PackageReference Include="FsCodec.SystemTextJson" Version="3.0.4-alpha.0.9" />
+    <PackageReference Include="FsCodec.SystemTextJson" Version="3.0.4-alpha.0.11" />
 
     <ProjectReference Include="..\..\..\src\Equinox\Equinox.fsproj" />
   </ItemGroup>
diff --git a/samples/Tutorial/Tutorial.fsproj b/samples/Tutorial/Tutorial.fsproj
index fc8d93fe5..a6d7334a3 100644
--- a/samples/Tutorial/Tutorial.fsproj
+++ b/samples/Tutorial/Tutorial.fsproj
@@ -28,7 +28,7 @@
 
   <ItemGroup>
     <PackageReference Include="MinVer" Version="5.0.0" PrivateAssets="All" />
-    <PackageReference Include="FsCodec.SystemTextJson" Version="3.0.4-alpha.0.9" />
+    <PackageReference Include="FsCodec.SystemTextJson" Version="3.0.4-alpha.0.11" />
     <PackageReference Include="Serilog.Sinks.Console" Version="5.0.1" />
     <PackageReference Include="Serilog.Sinks.Seq" Version="7.0.0" />
   </ItemGroup>
diff --git a/tests/Equinox.CosmosStore.Integration/CosmosCoreIntegration.fs b/tests/Equinox.CosmosStore.Integration/CosmosCoreIntegration.fs
index e7c6eb8e3..deecfddd0 100644
--- a/tests/Equinox.CosmosStore.Integration/CosmosCoreIntegration.fs
+++ b/tests/Equinox.CosmosStore.Integration/CosmosCoreIntegration.fs
@@ -10,7 +10,7 @@ open System
 
 type TestEvents() =
     static member private Create(i, ?eventType, ?json) =
-        let enc = System.Text.Json.JsonSerializer.SerializeToElement >> FsCodec.SystemTextJson.Encoding.Uncompressed
+        let enc = System.Text.Json.JsonSerializer.SerializeToElement >> FsCodec.SystemTextJson.Encoding.FromJsonElement
         FsCodec.Core.EventData.Create
             (   sprintf "%s:%d" (defaultArg eventType "test_event") i,
                 enc (defaultArg json "{\"d\":\"d\"}"),