diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1d186859..e47e9788 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         otp: ['22', '23', '24', '25']
-        elixir: ['1.11.4', '1.12.3', '1.13.4', '1.14.5', '1.15.5']
+        elixir: ['1.12.3', '1.13.4', '1.14.5', '1.15.5']
         # Exclude invalid combinations of Elixir and OTP
         exclude:
           - otp: '22'
@@ -22,8 +22,6 @@ jobs:
             elixir: '1.15.5'
           - otp: '23'
             elixir: '1.15.5'
-          - otp: '25'
-            elixir: '1.11.4'
           - otp: '25'
             elixir: '1.12.3'
           - otp: '25'
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6437282b..6445a763 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixes
 - Crash when updating records.
+- Removes elixir and phoenix deprecation warnings [PR#288](https://github.com/aesmail/kaffy/pull/288)
 
 ### Added
 - Support for filtering `{:array, :string}` fields [PR#285](https://github.com/aesmail/kaffy/pull/262)
diff --git a/README.md b/README.md
index dd38b3b7..dbf36168 100644
--- a/README.md
+++ b/README.md
@@ -59,10 +59,18 @@ If you or your company wants to sponsor the development of Kaffy, please reach o
 
 ## Minimum Requirements
 
-- Elixir 1.11.4
-- Phoenix 1.5.0
+Starting with v0.10.0, Kaffy will officially support the latest two phoenix versions.
 
-We aim to follow Elixir's [support policy](https://hexdocs.pm/elixir/compatibility-and-deprecations.html) for the minimum required Elixir version.
+| Kaffy   | Supported phoenix versions |
+|---------|----------------------------|
+| v0.10.0 | 1.6, 1.7                   |
+| v0.9.X  | 1.5, 1.6, 1.7              |
+|         |                            |
+
+
+## Support Policy
+
+The latest released `major.minor` version will be supported. For example, if the latest version is `0.9.0`, then `0.9.1` will be released with bug fixes. If a new version `0.10.0` is released, then `0.9.1` will no longer receive bug fixes or security patches.
 
 ## Installation
 
diff --git a/lib/kaffy/utils.ex b/lib/kaffy/utils.ex
index 572c54df..7820131c 100644
--- a/lib/kaffy/utils.ex
+++ b/lib/kaffy/utils.ex
@@ -96,8 +96,15 @@ defmodule Kaffy.Utils do
   """
   @spec get_version_of(atom()) :: String.t()
   def get_version_of(package) do
-    {:ok, version} = :application.get_key(package, :vsn)
-    to_string(version)
+    case package do
+      :elixir ->
+        System.version()
+
+      _ ->
+        {:ok, version} = :application.get_key(package, :vsn)
+        version
+    end
+    |> to_string()
   end
 
   @doc """
@@ -482,4 +489,9 @@ defmodule Kaffy.Utils do
   def visible?(options) do
     Keyword.get(options, :in_menu, true)
   end
+
+  def version_match?(app, version) do
+    get_version_of(app)
+    |> Version.match?(version)
+  end
 end
diff --git a/lib/kaffy_web/templates/layout/app.html.eex b/lib/kaffy_web/templates/layout/app.html.eex
index 70fd0290..fefcdc1c 100644
--- a/lib/kaffy_web/templates/layout/app.html.eex
+++ b/lib/kaffy_web/templates/layout/app.html.eex
@@ -130,7 +130,7 @@
           <div class="content-wrapper">
             <%= if get_flash(@conn, :success) do %>
                 <div class="alert alert-success">
-                  <i class="fa fa-check"></i><strong>Success: </strong> <%= get_flash(@conn, :success) %>
+                    <i class="fa fa-check"></i><strong>Success: </strong> <%= get_flash(@conn, :success) %>
                 </div>
             <% end %>
             <%= if get_flash(@conn, :info) do %>
@@ -149,11 +149,7 @@
                 </div>
             <% end %>
 
-            <%= if Kaffy.Utils.phoenix_version?("1.4.") do %>
-              <%= render(@view_module, @view_template, assigns) %>
-            <% else %>
-              <%= @inner_content %>
-            <% end %>
+            <%= @inner_content %>
           </div>
 
           <footer class="footer">
diff --git a/lib/kaffy_web/views/layout_view.ex b/lib/kaffy_web/views/layout_view.ex
index 63921d15..7c6d6c7f 100644
--- a/lib/kaffy_web/views/layout_view.ex
+++ b/lib/kaffy_web/views/layout_view.ex
@@ -5,6 +5,20 @@ defmodule KaffyWeb.LayoutView do
     root: "lib/kaffy_web/templates",
     namespace: KaffyWeb
 
-  import Phoenix.Controller, only: [get_flash: 2]
   use Phoenix.HTML
+
+  def get_flash(conn), do: conn.assigns.flash
+
+  def get_flash(conn, key) do
+    [mod, func, args] =
+      cond do
+        Kaffy.Utils.version_match?(:phoenix, "~> 1.7") ->
+          [Phoenix.Flash, :get, [conn.assigns.flash, key]]
+
+        true ->
+          [Phoenix.Controller, :get_flash, [conn, key]]
+      end
+
+    apply(mod, func, args)
+  end
 end
diff --git a/mix.exs b/mix.exs
index 4c8e9d4c..9e1cacee 100644
--- a/mix.exs
+++ b/mix.exs
@@ -8,8 +8,8 @@ defmodule Kaffy.MixProject do
     [
       app: :kaffy,
       version: @version,
-      elixir: "~> 1.11",
-      compilers: [:phoenix] ++ Mix.compilers(),
+      elixir: "~> 1.12",
+      compilers: Mix.compilers(),
       elixirc_paths: elixirc_paths(Mix.env()),
       start_permanent: Mix.env() == :prod,
       description: description(),
@@ -35,7 +35,7 @@ defmodule Kaffy.MixProject do
   # Run "mix help deps" to learn about dependencies.
   defp deps do
     [
-      {:phoenix, "~> 1.5"},
+      {:phoenix, "~> 1.6"},
       {:phoenix_html, "~> 3.0"},
       {:phoenix_view, "~> 2.0.2"},
       {:mock, "~> 0.3.3", only: :test},
diff --git a/test/actions_test.exs b/test/actions_test.exs
index 4997e068..bfd05674 100644
--- a/test/actions_test.exs
+++ b/test/actions_test.exs
@@ -1,6 +1,6 @@
 defmodule ActionsTest do
   use ExUnit.Case
-  use Phoenix.ConnTest
+  import Phoenix.ConnTest
 
   import Mock
   alias Phoenix.Controller, as: PhoenixController
@@ -164,7 +164,7 @@ defmodule ActionsTest do
           "id" => "id"
         })
 
-      assert %{"success" => _} = get_flash(result_conn)
+      assert %{"success" => _} = KaffyWeb.LayoutView.get_flash(result_conn)
     end
   end
 
@@ -178,7 +178,7 @@ defmodule ActionsTest do
           "id" => "id"
         })
 
-      assert %{"success" => _} = get_flash(result_conn)
+      assert %{"success" => _} = KaffyWeb.LayoutView.get_flash(result_conn)
     end
   end
 
@@ -192,7 +192,7 @@ defmodule ActionsTest do
           "id" => "1:1"
         })
 
-      assert %{"success" => _} = get_flash(result_conn)
+      assert %{"success" => _} = KaffyWeb.LayoutView.get_flash(result_conn)
     end
   end
 
@@ -207,7 +207,7 @@ defmodule ActionsTest do
           "id" => "1:1,1:2"
         })
 
-      assert %{"success" => _} = get_flash(result_conn)
+      assert %{"success" => _} = KaffyWeb.LayoutView.get_flash(result_conn)
     end
   end
 end
diff --git a/test/kaffy/resource_form_test.exs b/test/kaffy/resource_form_test.exs
index cdbfe9ae..5123c098 100644
--- a/test/kaffy/resource_form_test.exs
+++ b/test/kaffy/resource_form_test.exs
@@ -86,7 +86,8 @@ defmodule Kaffy.ResourceFormTest do
     field_opts = Keyword.get(opts, :field_opts, %{})
 
     changeset = Ecto.Changeset.change(schema, %{})
-    form = Phoenix.HTML.Form.form_for(:dummy, "/")
+
+    form = Phoenix.HTML.FormData.to_form(changeset.changes, as: :dummy)
     ast = ResourceForm.form_field(changeset, form, {name, field_opts})
 
     case ast do