diff --git a/src/Servers/Kestrel/Core/src/Internal/Http2/FlowControl/InputFlowControl.cs b/src/Servers/Kestrel/Core/src/Internal/Http2/FlowControl/InputFlowControl.cs
index e3d57bad05071..beb43a2ea43c6 100644
--- a/src/Servers/Kestrel/Core/src/Internal/Http2/FlowControl/InputFlowControl.cs
+++ b/src/Servers/Kestrel/Core/src/Internal/Http2/FlowControl/InputFlowControl.cs
@@ -25,7 +25,7 @@ internal sealed class InputFlowControl
     private FlowControl _flow;
     private int _pendingUpdateSize;
     private bool _windowUpdatesDisabled;
-    private readonly Lock _flowLock = new();
+    private readonly object _flowLock = new();
 
     public InputFlowControl(uint initialWindowSize, uint minWindowSizeIncrement)
     {
diff --git a/src/Servers/Kestrel/Core/src/Internal/Http2/Http2FrameWriter.cs b/src/Servers/Kestrel/Core/src/Internal/Http2/Http2FrameWriter.cs
index 6b601fdcc7be4..d9fbe79bf4fb8 100644
--- a/src/Servers/Kestrel/Core/src/Internal/Http2/Http2FrameWriter.cs
+++ b/src/Servers/Kestrel/Core/src/Internal/Http2/Http2FrameWriter.cs
@@ -99,7 +99,7 @@ internal sealed class Http2FrameWriter
     private bool _completed;
     private bool _aborted;
 
-    private readonly Lock _windowUpdateLock = new();
+    private readonly object _windowUpdateLock = new();
     private long _connectionWindow;
     private readonly Queue<Http2OutputProducer> _waitingForMoreConnectionWindow = new();
     // This is the stream that consumed the last set of connection window