diff --git a/config/config.exs b/config/config.exs
--- a/config/config.exs
+++ b/config/config.exs
@@ -28,3 +28,6 @@
 # here (which is why it is important to import them last).
 #
 #     import_config "#{Mix.env}.exs"
+
+config :kolab_wopi,
+  chwala_base_url: "http://localhost/chwala/api/"
diff --git a/lib/kolab_wopi.ex b/lib/kolab_wopi.ex
--- a/lib/kolab_wopi.ex
+++ b/lib/kolab_wopi.ex
@@ -8,8 +8,7 @@
 
     children = [
       # Define workers and child supervisors to be supervised
-      worker(__MODULE__.API, []),
-      worker(__MODULE__.Chwala, [])
+      worker(__MODULE__.API, [])
     ]
 
     # See http://elixir-lang.org/docs/stable/elixir/Supervisor.html
diff --git a/lib/kolab_wopi/chwala.ex b/lib/kolab_wopi/chwala.ex
--- a/lib/kolab_wopi/chwala.ex
+++ b/lib/kolab_wopi/chwala.ex
@@ -1,11 +1,8 @@
 defmodule KolabWopi.Chwala do
-  use GenServer
   use HTTPoison.Base
 
   require Logger
 
-  @url "http://localhost/chwala/api/"
-
   def start_link do
      GenServer.start_link(__MODULE__, [])
   end
@@ -40,7 +37,7 @@
 
     # TODO: error handling
 
-    response = get!(@url, [], params: params)
+    response = get!(base_url, [], params: params)
     response.body
   end
 
@@ -68,7 +65,7 @@
       id: file_id,
     }
 
-    response = get!(@url, [], params: params)
+    response = get!(base_url, [], params: params)
     response.body
   end
 
@@ -101,7 +98,7 @@
 
     # TODO: use streams to pass the file body?
 
-    response = put!(@url, body, [], params: params)
+    response = put!(base_url, body, [], params: params)
   end
 
   @doc """
@@ -138,4 +135,9 @@
       |> Poison.decode!
       |> Enum.map(fn({k, v}) -> {String.to_atom(k), v} end)
   end
+
+  # Returns the base URL for the chwala implementation
+  defp base_url() do
+    Application.get_env(:kolab_wopi, :chwala_base_url)
+  end
 end