diff --git a/config/config.exs b/config/config.exs
index 237c61ac9..30c9f248b 100644
--- a/config/config.exs
+++ b/config/config.exs
@@ -56,20 +56,6 @@ config :pleroma, Pleroma.Captcha,
   seconds_valid: 60,
   method: Pleroma.Captcha.Kocaptcha
 
-config :pleroma, :hackney_pools,
-  federation: [
-    max_connections: 50,
-    timeout: 150_000
-  ],
-  media: [
-    max_connections: 50,
-    timeout: 150_000
-  ],
-  upload: [
-    max_connections: 25,
-    timeout: 300_000
-  ]
-
 config :pleroma, Pleroma.Captcha.Kocaptcha, endpoint: "https://captcha.kotobank.ch"
 
 # Upload configuration
@@ -193,11 +179,11 @@ config :pleroma, :http,
   proxy_url: nil,
   send_user_agent: true,
   adapter: [
-    ssl_options: [
-      # Workaround for remote server certificate chain issues
-      partial_chain: &:hackney_connect.partial_chain/1,
-      # We don't support TLS v1.3 yet
-      versions: [:tlsv1, :"tlsv1.1", :"tlsv1.2"]
+    tls_opts: [
+      verify: :verify_peer,
+      cacerts: :certifi.cacerts(),
+      depth: 20,
+      reuse_sessions: false
     ]
   ]
 
diff --git a/lib/pleroma/application.ex b/lib/pleroma/application.ex
index 347f520bb..5ff2e06b0 100644
--- a/lib/pleroma/application.ex
+++ b/lib/pleroma/application.ex
@@ -38,7 +38,6 @@ defmodule Pleroma.Application do
         Pleroma.ScheduledActivityWorker
       ] ++
         cachex_children() ++
-        hackney_pool_children() ++
         gun_pools() ++
         [
           Pleroma.Web.Federator.RetryQueue,
@@ -95,20 +94,6 @@ defmodule Pleroma.Application do
     Pleroma.Web.Endpoint.Instrumenter.setup()
   end
 
-  def enabled_hackney_pools do
-    [:media] ++
-      if Application.get_env(:tesla, :adapter) == Tesla.Adapter.Hackney do
-        [:federation]
-      else
-        []
-      end ++
-      if Pleroma.Config.get([Pleroma.Upload, :proxy_remote]) do
-        [:upload]
-      else
-        []
-      end
-  end
-
   defp cachex_children do
     [
       build_cachex("used_captcha", ttl_interval: seconds_valid_interval()),
@@ -157,13 +142,6 @@ defmodule Pleroma.Application do
 
   defp chat_child(_, _), do: []
 
-  defp hackney_pool_children do
-    for pool <- enabled_hackney_pools() do
-      options = Pleroma.Config.get([:hackney_pools, pool])
-      :hackney_pool.child_spec(pool, options)
-    end
-  end
-
   defp gun_pools do
     if Application.get_env(:tesla, :adapter) == Tesla.Adapter.Gun || Mix.env() == :test do
       for {pool_name, opts} <- Pleroma.Config.get([:gun_pools]) do
diff --git a/lib/pleroma/reverse_proxy/client/hackney.ex b/lib/pleroma/reverse_proxy/client/hackney.ex
deleted file mode 100644
index 402c183af..000000000
--- a/lib/pleroma/reverse_proxy/client/hackney.ex
+++ /dev/null
@@ -1,21 +0,0 @@
-# Pleroma: A lightweight social networking server
-# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
-# SPDX-License-Identifier: AGPL-3.0-only
-
-defmodule Pleroma.ReverseProxy.Client.Hackney do
-  @behaviour Pleroma.ReverseProxy.Client
-
-  def request(method, url, headers, body, opts \\ []) do
-    :hackney.request(method, url, headers, body, opts)
-  end
-
-  def stream_body(ref) do
-    case :hackney.stream_body(ref) do
-      :done -> :done
-      {:ok, data} -> {:ok, data, ref}
-      {:error, error} -> {:error, error}
-    end
-  end
-
-  def close(ref), do: :hackney.close(ref)
-end
diff --git a/lib/pleroma/reverse_proxy/reverse_proxy.ex b/lib/pleroma/reverse_proxy/reverse_proxy.ex
index a2cdcf393..df4eca207 100644
--- a/lib/pleroma/reverse_proxy/reverse_proxy.ex
+++ b/lib/pleroma/reverse_proxy/reverse_proxy.ex
@@ -58,7 +58,7 @@ defmodule Pleroma.ReverseProxy do
 
   * `req_headers`, `resp_headers` additional headers.
 
-  * `http`: options for [hackney](https://github.com/benoitc/hackney).
+  * `http`: options for [gun](https://github.com/ninenines/gun).
 
   """
   @default_options [pool: :media]
@@ -147,11 +147,11 @@ defmodule Pleroma.ReverseProxy do
     |> halt()
   end
 
-  defp request(method, url, headers, hackney_opts) do
+  defp request(method, url, headers, opts) do
     Logger.debug("#{__MODULE__} #{method} #{url} #{inspect(headers)}")
     method = method |> String.downcase() |> String.to_existing_atom()
 
-    case client().request(method, url, headers, "", hackney_opts) do
+    case client().request(method, url, headers, "", opts) do
       {:ok, code, headers, client} when code in @valid_resp_codes ->
         {:ok, code, downcase_headers(headers), client}
 
diff --git a/lib/pleroma/web/admin_api/config.ex b/lib/pleroma/web/admin_api/config.ex
index a10cc779b..25e91eee6 100644
--- a/lib/pleroma/web/admin_api/config.ex
+++ b/lib/pleroma/web/admin_api/config.ex
@@ -95,7 +95,6 @@ defmodule Pleroma.Web.AdminAPI.Config do
   end
 
   defp do_convert({:dispatch, [entity]}), do: %{"tuple" => [":dispatch", [inspect(entity)]]}
-  defp do_convert({:partial_chain, entity}), do: %{"tuple" => [":partial_chain", inspect(entity)]}
 
   defp do_convert(entity) when is_tuple(entity),
     do: %{"tuple" => do_convert(Tuple.to_list(entity))}
@@ -129,11 +128,6 @@ defmodule Pleroma.Web.AdminAPI.Config do
     {:dispatch, [dispatch_settings]}
   end
 
-  defp do_transform(%{"tuple" => [":partial_chain", entity]}) do
-    {partial_chain, []} = do_eval(entity)
-    {:partial_chain, partial_chain}
-  end
-
   defp do_transform(%{"tuple" => entity}) do
     Enum.reduce(entity, {}, fn val, acc -> Tuple.append(acc, do_transform(val)) end)
   end
diff --git a/test/reverse_proxy/client/hackney_test.exs b/test/reverse_proxy/client/hackney_test.exs
deleted file mode 100644
index 3c552dc83..000000000
--- a/test/reverse_proxy/client/hackney_test.exs
+++ /dev/null
@@ -1,15 +0,0 @@
-# Pleroma: A lightweight social networking server
-# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
-# SPDX-License-Identifier: AGPL-3.0-only
-
-defmodule Pleroma.ReverseProxy.Client.HackneyTest do
-  use Pleroma.ReverseProxyClientCase, client: Pleroma.ReverseProxy.Client.Hackney
-
-  defp check_ref(ref) do
-    assert is_reference(ref)
-  end
-
-  defp close(ref) do
-    Pleroma.ReverseProxy.Client.Hackney.close(ref)
-  end
-end
diff --git a/test/reverse_proxy/reverse_proxy_test.exs b/test/reverse_proxy/reverse_proxy_test.exs
index a1adaedf6..b2f7932bf 100644
--- a/test/reverse_proxy/reverse_proxy_test.exs
+++ b/test/reverse_proxy/reverse_proxy_test.exs
@@ -301,21 +301,6 @@ defmodule Pleroma.ReverseProxyTest do
   describe "integration tests" do
     @describetag :integration
 
-    test "with hackney client", %{conn: conn} do
-      client = Pleroma.Config.get([Pleroma.ReverseProxy.Client])
-      Pleroma.Config.put([Pleroma.ReverseProxy.Client], Pleroma.ReverseProxy.Client.Hackney)
-
-      on_exit(fn ->
-        Pleroma.Config.put([Pleroma.ReverseProxy.Client], client)
-      end)
-
-      conn = ReverseProxy.call(conn, "http://httpbin.org/stream-bytes/10")
-
-      assert byte_size(conn.resp_body) == 10
-      assert conn.state == :chunked
-      assert conn.status == 200
-    end
-
     test "with tesla client with gun adapter", %{conn: conn} do
       client = Pleroma.Config.get([Pleroma.ReverseProxy.Client])
       Pleroma.Config.put([Pleroma.ReverseProxy.Client], Pleroma.ReverseProxy.Client.Tesla)
diff --git a/test/web/admin_api/admin_api_controller_test.exs b/test/web/admin_api/admin_api_controller_test.exs
index 844cd0732..0472a3f6d 100644
--- a/test/web/admin_api/admin_api_controller_test.exs
+++ b/test/web/admin_api/admin_api_controller_test.exs
@@ -1551,8 +1551,7 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIControllerTest do
                 %{"tuple" => [":method", "Pleroma.Captcha.Kocaptcha"]},
                 %{"tuple" => [":seconds_valid", 60]},
                 %{"tuple" => [":path", ""]},
-                %{"tuple" => [":key1", nil]},
-                %{"tuple" => [":partial_chain", "&:hackney_connect.partial_chain/1"]}
+                %{"tuple" => [":key1", nil]}
               ]
             }
           ]
@@ -1568,8 +1567,7 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIControllerTest do
                      %{"tuple" => [":method", "Pleroma.Captcha.Kocaptcha"]},
                      %{"tuple" => [":seconds_valid", 60]},
                      %{"tuple" => [":path", ""]},
-                     %{"tuple" => [":key1", nil]},
-                     %{"tuple" => [":partial_chain", "&:hackney_connect.partial_chain/1"]}
+                     %{"tuple" => [":key1", nil]}
                    ]
                  }
                ]
diff --git a/test/web/admin_api/config_test.exs b/test/web/admin_api/config_test.exs
index 3190dc1c8..d41666ef3 100644
--- a/test/web/admin_api/config_test.exs
+++ b/test/web/admin_api/config_test.exs
@@ -238,14 +238,6 @@ defmodule Pleroma.Web.AdminAPI.ConfigTest do
       assert Config.from_binary(binary) == [key: "value"]
     end
 
-    test "keyword with partial_chain key" do
-      binary =
-        Config.transform([%{"tuple" => [":partial_chain", "&:hackney_connect.partial_chain/1"]}])
-
-      assert binary == :erlang.term_to_binary(partial_chain: &:hackney_connect.partial_chain/1)
-      assert Config.from_binary(binary) == [partial_chain: &:hackney_connect.partial_chain/1]
-    end
-
     test "keyword" do
       binary =
         Config.transform([