diff --git a/lib/livebook/runtime.ex b/lib/livebook/runtime.ex
index a7d24d319..fc481fade 100644
--- a/lib/livebook/runtime.ex
+++ b/lib/livebook/runtime.ex
@@ -341,7 +341,7 @@ defprotocol Livebook.Runtime do
               type: :range,
               default: number(),
               label: String.t(),
-              debounce: :blur | non_neg_integer(),
+              debounce: non_neg_integer(),
               min: number(),
               max: number(),
               step: number()
diff --git a/lib/livebook/session.ex b/lib/livebook/session.ex
index 719bcf64a..a94144e56 100644
--- a/lib/livebook/session.ex
+++ b/lib/livebook/session.ex
@@ -2892,7 +2892,13 @@ defmodule Livebook.Session do
   defp normalize_runtime_output(%{type: :input, attrs: attrs} = output)
        when attrs.type in [:text, :textarea, :password, :number, :url, :range, :color] and
               not is_map_key(attrs, :debounce) do
-    put_in(output.attrs[:debounce], :blur)
+    default =
+      case attrs.type do
+        :range -> 250
+        _other -> :blur
+      end
+
+    put_in(output.attrs[:debounce], default)
     |> normalize_runtime_output()
   end