diff --git a/PuppeteerSharp.Dom/AsyncDomExtensions.cs b/PuppeteerSharp.Dom/AsyncDomExtensions.cs
index f949459..77553d9 100644
--- a/PuppeteerSharp.Dom/AsyncDomExtensions.cs
+++ b/PuppeteerSharp.Dom/AsyncDomExtensions.cs
@@ -164,7 +164,7 @@ public static async Task<TOut> AndThen<TIn, TOut>(this Task<TIn> inputTask, Func
 
             var result = await func(input).ConfigureAwait(false);
 
-            if (dispose)
+            if (dispose && input != null)
             {
                 await input.DisposeAsync().ConfigureAwait(false);
             }