diff --git a/CHANGELOG.md b/CHANGELOG.md
index a062c8d..5eef935 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## Unreleased
+
+- update Ch to [v0.5.x](https://github.com/plausible/ch/blob/master/CHANGELOG.md#050-2025-07-17) which adds Time, Variant, and JSON support https://github.com/plausible/ecto_ch/pull/233
+
 ## 0.7.1 (2025-07-07)
 
 - update [Ch](https://github.com/plausible/ch) (our ClickHouse client) to v0.4.x
diff --git a/mix.exs b/mix.exs
index dbfa92f..7499574 100644
--- a/mix.exs
+++ b/mix.exs
@@ -39,7 +39,7 @@ defmodule EctoCh.MixProject do
   # Run "mix help deps" to learn about dependencies.
   defp deps do
     [
-      {:ch, "~> 0.4.0"},
+      {:ch, "~> 0.5.0"},
       {:ecto_sql, "~> 3.13.0"},
       {:benchee, "~> 1.1", only: :bench},
       {:dialyxir, "~> 1.2", only: [:dev, :test], runtime: false},
diff --git a/mix.lock b/mix.lock
index f5356d2..f0bf9d1 100644
--- a/mix.lock
+++ b/mix.lock
@@ -1,6 +1,6 @@
 %{
   "benchee": {:hex, :benchee, "1.4.0", "9f1f96a30ac80bab94faad644b39a9031d5632e517416a8ab0a6b0ac4df124ce", [:mix], [{:deep_merge, "~> 1.0", [hex: :deep_merge, repo: "hexpm", optional: false]}, {:statistex, "~> 1.0", [hex: :statistex, repo: "hexpm", optional: false]}, {:table, "~> 0.1.0", [hex: :table, repo: "hexpm", optional: true]}], "hexpm", "299cd10dd8ce51c9ea3ddb74bb150f93d25e968f93e4c1fa31698a8e4fa5d715"},
-  "ch": {:hex, :ch, "0.4.1", "716fc326a0d29212a35c15e5350355550ff1290a244e6f37bf3eac4318aeeb76", [:mix], [{:db_connection, "~> 2.0", [hex: :db_connection, repo: "hexpm", optional: false]}, {:decimal, "~> 2.0", [hex: :decimal, repo: "hexpm", optional: false]}, {:ecto, "~> 3.13.0", [hex: :ecto, repo: "hexpm", optional: true]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}, {:mint, "~> 1.0", [hex: :mint, repo: "hexpm", optional: false]}], "hexpm", "e6a4cf90d22030afde77e1a2895ebba2888032ccc5f1bec947b26b90a9152ffc"},
+  "ch": {:hex, :ch, "0.5.0", "e1047b9a650d34ff5b001a149aa88ebfdf3d31a481e3e255747cf1635e9d54eb", [:mix], [{:db_connection, "~> 2.0", [hex: :db_connection, repo: "hexpm", optional: false]}, {:decimal, "~> 2.0", [hex: :decimal, repo: "hexpm", optional: false]}, {:ecto, "~> 3.13.0", [hex: :ecto, repo: "hexpm", optional: true]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}, {:mint, "~> 1.0", [hex: :mint, repo: "hexpm", optional: false]}], "hexpm", "119100210a128fc4d5ef4e7531a1256f4ee686afc85241392e93bb1da0b56967"},
   "db_connection": {:hex, :db_connection, "2.8.0", "64fd82cfa6d8e25ec6660cea73e92a4cbc6a18b31343910427b702838c4b33b2", [:mix], [{:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "008399dae5eee1bf5caa6e86d204dcb44242c82b1ed5e22c881f2c34da201b15"},
   "decimal": {:hex, :decimal, "2.3.0", "3ad6255aa77b4a3c4f818171b12d237500e63525c2fd056699967a3e7ea20f62", [:mix], [], "hexpm", "a4d66355cb29cb47c3cf30e71329e58361cfcb37c34235ef3bf1d7bf3773aeac"},
   "deep_merge": {:hex, :deep_merge, "1.0.0", "b4aa1a0d1acac393bdf38b2291af38cb1d4a52806cf7a4906f718e1feb5ee961", [:mix], [], "hexpm", "ce708e5f094b9cd4e8f2be4f00d2f4250c4095be93f8cd6d018c753894885430"},
diff --git a/test/ecto/integration/json_test.exs b/test/ecto/integration/json_test.exs
index 478e5cc..e3586b7 100644
--- a/test/ecto/integration/json_test.exs
+++ b/test/ecto/integration/json_test.exs
@@ -1,5 +1,8 @@
 defmodule Ecto.Integration.JsonTest do
   use Ecto.Integration.Case
+  import Ecto.Query, only: [from: 2]
+
+  @moduletag :json
 
   alias Ecto.Integration.TestRepo
   alias EctoClickHouse.Integration.Setting
@@ -23,4 +26,99 @@ defmodule Ecto.Integration.JsonTest do
                [setting.id]
              )
   end
+
+  defmodule SemiStructured do
+    use Ecto.Schema
+
+    @primary_key false
+    schema "semi_structured" do
+      field :json, Ch, type: "JSON"
+      field :time, :naive_datetime
+    end
+  end
+
+  test "basic" do
+    TestRepo.query!("""
+    CREATE TABLE semi_structured (
+      json JSON,
+      time DateTime
+    ) ENGINE MergeTree ORDER BY time
+    """)
+
+    on_exit(fn -> TestRepo.query!("DROP TABLE semi_structured") end)
+
+    %SemiStructured{}
+    |> Ecto.Changeset.cast(
+      %{
+        json: %{"from" => "insert"},
+        time: ~N[2023-10-01 12:00:00]
+      },
+      [:json, :time]
+    )
+    |> TestRepo.insert!()
+
+    TestRepo.insert_all(SemiStructured, [
+      %{json: %{"from" => "insert_all"}, time: ~N[2023-10-01 13:00:00]},
+      %{json: %{"from" => "another_insert_all"}, time: ~N[2023-10-01 13:01:00]}
+    ])
+
+    assert TestRepo.all(from s in SemiStructured, select: s.json, order_by: s.time) == [
+             %{"from" => "insert"},
+             %{"from" => "insert_all"},
+             %{"from" => "another_insert_all"}
+           ]
+  end
+
+  # https://github.com/plausible/ecto_ch/pull/233#issuecomment-3079317842
+
+  defmodule TokenInfoSchema do
+    @moduledoc false
+    use Ecto.Schema
+
+    @primary_key false
+    schema "token_infos" do
+      field :mint, Ch, type: "String"
+      field :data, Ch, type: "JSON", source: :data
+      field :created_at, Ch, type: "DateTime"
+    end
+  end
+
+  test "token_info_schema" do
+    TestRepo.query!("""
+    create table token_infos(
+      mint String,
+      data JSON,
+      created_at DateTime
+    ) engine = MergeTree order by created_at
+    """)
+
+    on_exit(fn -> TestRepo.query!("DROP TABLE token_infos") end)
+
+    missing_tokens = [
+      %{
+        mint: "123",
+        data: %{"name" => "Test", "nested" => %{"name" => "Test", "arr" => ["abc", "b=deb"]}},
+        created_at: NaiveDateTime.utc_now() |> NaiveDateTime.truncate(:second)
+      },
+      %{
+        mint: "325",
+        data: %{"name" => "Test", "nested" => %{"name" => "Test", "arr" => ["abc", "b=deb"]}},
+        created_at: NaiveDateTime.utc_now() |> NaiveDateTime.truncate(:second)
+      }
+    ]
+
+    assert {2, nil} = TestRepo.insert_all(TokenInfoSchema, missing_tokens)
+
+    assert TestRepo.all(
+             from t in TokenInfoSchema,
+               order_by: t.created_at,
+               select: %{
+                 mint: t.mint,
+                 name: fragment("?.nested.name::text", t.data)
+               }
+           ) == [
+             %{mint: "123", name: "Test"},
+             %{mint: "325", name: "Test"}
+           ]
+  end
 end
diff --git a/test/test_helper.exs b/test/test_helper.exs
index 594202d..3de8eb7 100644
--- a/test/test_helper.exs
+++ b/test/test_helper.exs
@@ -28,6 +28,7 @@ alias Ecto.Integration.TestRepo
 Application.put_env(:ecto_ch, TestRepo,
   adapter: Ecto.Adapters.ClickHouse,
   database: "ecto_ch_test",
+  settings: [enable_json_type: 1],
   show_sensitive_data_on_connection_error: true
 )