diff --git a/lib/geef/repository.ex b/lib/geef/repository.ex
index ffe67d0..91000bc 100644
--- a/lib/geef/repository.ex
+++ b/lib/geef/repository.ex
@@ -12,7 +12,7 @@ defmodule Geef.Repository do
   def odb(repo),  do: :geef_repo.odb(repo)
   def odb!(repo), do: :geef_repo.odb(repo) |> assert_ok
 
-  def discover(path), do: :geef_repo.disover(path)
+  def discover(path), do: :geef_repo.discover(path)
 
   def bare?(repo), do: :geef_repo.is_bare(repo)
   def workdir(repo), do: :geef_repo.workdir(repo)
diff --git a/src/geef_odb.erl b/src/geef_odb.erl
index 99048db..cde6927 100644
--- a/src/geef_odb.erl
+++ b/src/geef_odb.erl
@@ -11,7 +11,7 @@
 -behaviour(gen_server).
 
 %% API
--export([start_link/1, exists/2, write/3]).
+-export([start_link/1, exists/2, write/3, stop/1]).
 
 %% gen_server callbacks
 -export([init/1, handle_call/3, handle_cast/2, handle_info/2,
@@ -25,6 +25,9 @@
 %%% API
 %%%===================================================================
 
+stop(Pid) ->
+    gen_server:call(Pid, stop).
+
 %% @doc
 %% Starts the server
 -spec start_link(term()) -> {ok, pid()} | ignore | {error, term()}.
diff --git a/src/geef_sig.erl b/src/geef_sig.erl
index d57f476..972fec0 100644
--- a/src/geef_sig.erl
+++ b/src/geef_sig.erl
@@ -4,7 +4,7 @@
 
 -export([new/2, new/3]).
 
--spec new(iolist(), iolist()) -> geef_signature() | {error, term()}.
+-spec new(iolist(), iolist()) -> {ok, geef_signature()} | {error, term()}.
 new(Name0, Email0) ->
     case geef_nif:signature_new(Name0, Email0) of
         {ok, Name, Email, Time0, Offset} ->
@@ -14,7 +14,7 @@ new(Name0, Email0) ->
             Err
     end.
 
--spec new(iolist(), iolist(), geef_time()) ->  geef_signature() | {error, term()}.
+-spec new(iolist(), iolist(), geef_time()) ->  {ok, geef_signature()} | {error, term()}.
 new(Name0, Email0, Time) ->
     case geef_nif:signature_new(Name0, Email0, 0) of
         {ok, Name, Email} ->