diff --git a/README.md b/README.md
index 339f8cc69..cb91f0b48 100644
--- a/README.md
+++ b/README.md
@@ -13,6 +13,7 @@ Mobile clients that are known to work well:
 * Pawoo (Android + iOS)
 * Subway Tooter
 * Amaroq (iOS)
+* Tootdon (Android + iOS)
 
 No release has been made yet, but several servers have been online for months already. If you want to run your own server, feel free to contact us at @lain@pleroma.soykaf.com or in our dev chat at https://matrix.heldscal.la/#/room/#pleromafe:matrix.heldscal.la.
 
diff --git a/lib/pleroma/web/oauth/oauth_controller.ex b/lib/pleroma/web/oauth/oauth_controller.ex
index 3e66c3ee8..841df8c32 100644
--- a/lib/pleroma/web/oauth/oauth_controller.ex
+++ b/lib/pleroma/web/oauth/oauth_controller.ex
@@ -40,7 +40,8 @@ def create_authorization(conn, %{"authorization" => %{"name" => name, "password"
   # - proper scope handling
   def token_exchange(conn, %{"grant_type" => "authorization_code"} = params) do
     with %App{} = app <- Repo.get_by(App, client_id: params["client_id"], client_secret: params["client_secret"]),
-         %Authorization{} = auth <- Repo.get_by(Authorization, token: params["code"], app_id: app.id),
+         fixed_token = fix_padding(params["code"]),
+         %Authorization{} = auth <- Repo.get_by(Authorization, token: fixed_token, app_id: app.id),
          {:ok, token} <- Token.exchange_token(app, auth) do
       response = %{
         token_type: "Bearer",
@@ -50,6 +51,14 @@ def token_exchange(conn, %{"grant_type" => "authorization_code"} = params) do
         scope: "read write follow"
       }
       json(conn, response)
+    else
+      _error -> json(conn, %{error: "Invalid credentials"})
     end
   end
+
+  defp fix_padding(token) do
+    token
+    |> Base.url_decode64!(padding: false)
+    |> Base.url_encode64
+  end
 end