diff --git a/README.md b/README.md
index cdec1a5..d75e6ad 100644
--- a/README.md
+++ b/README.md
@@ -773,7 +773,7 @@ version explicitly. Each configuration type follows the names used by that HTMX
 and 2.x expose `DefaultSwapStyle` and `Timeout`, while HTMX 4.x exposes `DefaultSwap` and
 `DefaultTimeout`. Selecting different versions in the same configuration throws an exception.
 
-HTMX 4.x is currently in beta. To target it, select it explicitly:
+To target HTMX 4.x, select it explicitly:
 
 ```csharp
 builder.Services.AddHtmxToolkit(options => options.UseHtmxV4());
diff --git a/src/Ramstack.HtmxToolkit/Configuration/HtmxV4Config.cs b/src/Ramstack.HtmxToolkit/Configuration/HtmxV4Config.cs
index 02d5eae..b910914 100644
--- a/src/Ramstack.HtmxToolkit/Configuration/HtmxV4Config.cs
+++ b/src/Ramstack.HtmxToolkit/Configuration/HtmxV4Config.cs
@@ -63,10 +63,14 @@ public HtmxSwap? DefaultSwap
     }
 
     /// <summary>
-    /// Gets or sets a value indicating whether an empty response body replaces the main swap target.
-    /// The HTMX default is <c>undefined</c>.
+    /// Gets or sets a value indicating whether the main swap is performed
+    /// when the response contained only out-of-band elements.
+    /// <c>&lt;hx-partial&gt;</c> content always prevents the main swap.
+    /// The HTMX default is <see langword="false" /> and can be overridden
+    /// using the <c>swapEmpty</c> modifier on <c>hx-swap</c>.
     /// </summary>
-    public bool? DefaultSwapEmpty
+    [JsonPropertyName("allowEmptySwapAfterOOB")]
+    public bool? AllowEmptySwapAfterOob
     {
         get;
         set => SetField(ref field, value);
diff --git a/tests/Ramstack.HtmxToolkit.Tests/TagHelpers/HtmxConfigTagHelperTests.cs b/tests/Ramstack.HtmxToolkit.Tests/TagHelpers/HtmxConfigTagHelperTests.cs
index 5eef6ab..3ff36d1 100644
--- a/tests/Ramstack.HtmxToolkit.Tests/TagHelpers/HtmxConfigTagHelperTests.cs
+++ b/tests/Ramstack.HtmxToolkit.Tests/TagHelpers/HtmxConfigTagHelperTests.cs
@@ -250,7 +250,7 @@ public async Task ProcessAsync_SerializesOnlyHtmx4Options()
             htmx.MetaCharacter = "-";
             htmx.History = HtmxHistoryMode.Reload;
             htmx.DefaultSwap = HtmxSwap.OuterMorph;
-            htmx.DefaultSwapEmpty = true;
+            htmx.AllowEmptySwapAfterOob = true;
             htmx.DefaultSettleDelay = 1;
             htmx.IncludeIndicatorCss = false;
             htmx.IndicatorClass = "indicator";
@@ -273,7 +273,7 @@ public async Task ProcessAsync_SerializesOnlyHtmx4Options()
 
         Assert.That(json.Keys, Is.EquivalentTo(new[]
         {
-            "logAll", "prefix", "metaCharacter", "history", "defaultSwap", "defaultSwapEmpty",
+            "logAll", "prefix", "metaCharacter", "history", "defaultSwap", "allowEmptySwapAfterOOB",
             "defaultSettleDelay", "includeIndicatorCSS", "indicatorClass", "requestClass",
             "inlineScriptNonce", "extensions", "implicitInheritance", "defaultTimeout", "mode",
             "defaultFocusScroll", "transitions", "morphIgnore", "morphSkip", "morphSkipChildren",