diff --git a/CHANGELOG.md b/CHANGELOG.md
index 79c0b65..d1ec343 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 0.19.4 - 2026-10-03
+
+### Compatibility
+
+- Require vize 0.16. Volt's use of vize is unchanged; 0.16 changes only `Vize.vapor_split/1`, which Volt doesn't call. PhoenixVapor needs vize 0.16 and Volt together.
+
 ## 0.19.3 - 2026-10-01
 
 ### Fixed
diff --git a/mix.exs b/mix.exs
index 3916924..aee828d 100644
--- a/mix.exs
+++ b/mix.exs
@@ -1,7 +1,7 @@
 defmodule Volt.MixProject do
   use Mix.Project
 
-  @version "0.19.3"
+  @version "0.19.4"
   @source_url "https://github.com/elixir-volt/volt"
 
   def project do
@@ -39,7 +39,7 @@ defmodule Volt.MixProject do
       {:reach, "~> 2.6.1", only: [:dev, :test], runtime: false},
       {:glob_ex, "~> 0.1.12"},
       {:oxc, "~> 0.18.1"},
-      {:vize, "~> 0.15.0"},
+      {:vize, "~> 0.16.0"},
       {:oxide_ex, "~> 0.2.2"},
       {:quickbeam, "~> 0.11.2"},
       {:dotenvy, "~> 1.1"},
diff --git a/mix.lock b/mix.lock
index 6deded8..aace6a8 100644
--- a/mix.lock
+++ b/mix.lock
@@ -64,7 +64,7 @@
   "text_diff": {:hex, :text_diff, "0.1.0", "1caf3175e11a53a9a139bc9339bd607c47b9e376b073d4571c031913317fecaa", [:mix], [], "hexpm", "d1ffaaecab338e49357b6daa82e435f877e0649041ace7755583a0ea3362dbd7"},
   "thousand_island": {:hex, :thousand_island, "1.5.0", "f50a213cac97262b6d5ebb85745aa2c00fec1413191e6e66834788d45425cecb", [:mix], [{:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "708923d40523e43cf99041ab37a0d4b0ec426ac6438fa3716ab23d919eaeb412"},
   "varint": {:hex, :varint, "1.6.0", "7bced828599b2eb84491a9f067f8a5a67fc35a946d3b7582278083c7fd434b00", [:mix], [], "hexpm", "2b4f4a20650aeebe993a70b03bb99571bcbddc27c361322c28b586d8a772ce4e"},
-  "vize": {:hex, :vize, "0.15.0", "f13eaecaa6a59c3314e374febc6b21e127560e08836f5d3e8edc4282412d182e", [:mix], [{:rustler, "~> 0.36", [hex: :rustler, repo: "hexpm", optional: true]}, {:rustler_precompiled, "~> 0.8", [hex: :rustler_precompiled, repo: "hexpm", optional: false]}], "hexpm", "e1f2021c1e43d1f7530081dbf00ea93f6e55ea6928d10371a64e1214605316a0"},
+  "vize": {:hex, :vize, "0.16.0", "6003d4a9111aa9007a47530edee137d8410b844a586a9d67077947e7fcb5096d", [:mix], [{:rustler, "~> 0.36", [hex: :rustler, repo: "hexpm", optional: true]}, {:rustler_precompiled, "~> 0.8", [hex: :rustler_precompiled, repo: "hexpm", optional: false]}], "hexpm", "cf29ccd05c25d9c7c6f1168b82892fc204c432a5933711fb33f4511072b96e66"},
   "websock": {:hex, :websock, "0.5.3", "2f69a6ebe810328555b6fe5c831a851f485e303a7c8ce6c5f675abeb20ebdadc", [:mix], [], "hexpm", "6105453d7fac22c712ad66fab1d45abdf049868f253cf719b625151460b8b453"},
   "websock_adapter": {:hex, :websock_adapter, "0.6.0", "73db5ab8aaefd1a876a97ce3e6afc96562625de69ef17a4e04426e034849d0b8", [:mix], [{:bandit, ">= 0.6.0", [hex: :bandit, repo: "hexpm", optional: true]}, {:plug, "~> 1.14", [hex: :plug, repo: "hexpm", optional: false]}, {:plug_cowboy, "~> 2.6", [hex: :plug_cowboy, repo: "hexpm", optional: true]}, {:websock, "~> 0.5", [hex: :websock, repo: "hexpm", optional: false]}], "hexpm", "50021a85bce8f203b086705d9e0c5415e2c7eb05d319111b0428fe71f9934617"},
   "zig_get": {:hex, :zig_get, "0.15.2", "a6ccaa894213839ba95615bf9be2b2c9268e37ab9547a2344830202cfd6d7cc0", [:mix], [], "hexpm", "e6b0028f2d5a8da791ff8037deff5b492784017d8d241e598377a24bd765f56f"},