diff --git a/README.md b/README.md
index 24945865..51923223 100644
--- a/README.md
+++ b/README.md
@@ -123,6 +123,10 @@ The library source code is minimal and well tested. It is suggested to read the
 
   ```mix papertrail.install```
 
+  You might want to edit the types for `:event_id` and `:originator_id` if you're
+  using UUID or other types for your primary keys before you execute
+  `mix ecto.migrate`.
+
   5. run the migration:
 
   ```mix ecto.migrate```
@@ -139,13 +143,25 @@ YES! Make sure you do the steps above.
 | ------------- | ------- | -------------------------- | ------------------------ |
 | event         | String  | either insert, update or delete  | Library generates |
 | item_type     | String  | model name of the reference record | Library generates |
-| item_id       | Integer | model id of the reference record | Library generates |
+| item_id       | configurable (Integer by default) | model id of the reference record | Library generates |
 | item_changes  | Map     | all the changes in this version as a map | Library generates |
-| originator_id | Integer | foreign key reference to the creator/owner of this change | Optionally set |
+| originator_id | configurable (Integer by default) | foreign key reference to the creator/owner of this change | Optionally set |
 | origin        | String  | short reference to origin(eg. worker:activity-checker, migration, admin:33) | Optionally set |
 | meta          | Map     | any extra optional meta information about the version(eg. %{slug: "ausername", important: true}) | Optionally set |
 | inserted_at   | Date    | inserted_at timestamp       | Ecto generates |
 
+#### Configuring the types
+
+If you are using UUID or another type for your primary keys, you can configure
+the PaperTrail.Version schema to use it.
+
+```elixir
+config :paper_trail, item_type: Ecto.UUID,
+                     originator_type: Ecto.UUID
+```
+
+Remember to edit the types accordingly in the generated migration.
+
 ### Version origin references:
 PaperTrail records have a string field called ```origin```. ```PaperTrail.insert/2```, ```PaperTrail.update/2```, ```PaperTrail.delete/2``` functions accept a second argument to describe the origin of this version:
 ```elixir
diff --git a/lib/version.ex b/lib/version.ex
index 97965dca..151855b2 100644
--- a/lib/version.ex
+++ b/lib/version.ex
@@ -6,12 +6,16 @@ defmodule PaperTrail.Version do
 
   @setter PaperTrail.RepoClient.originator || nil
 
+  #types
+  @item_type Application.get_env(:paper_trail, :item_type, :integer)
+  @originator_type Application.get_env(:paper_trail, :originator_type, :integer)
+
   schema "versions" do
     field :event, :string
     field :item_type, :string
-    field :item_id, :integer
+    field :item_id, @item_type
     field :item_changes, :map
-    field :originator_id, :integer
+    field :originator_id, @originator_type
     field :origin, :string, read_after_writes: true
     field :meta, :map
 
diff --git a/mix.lock b/mix.lock
index f13ddb85..77394f36 100644
--- a/mix.lock
+++ b/mix.lock
@@ -1,9 +1,9 @@
-%{"connection": {:hex, :connection, "1.0.4", "a1cae72211f0eef17705aaededacac3eb30e6625b04a6117c1b2db6ace7d5976", [:mix], []},
-  "db_connection": {:hex, :db_connection, "1.1.0", "b2b88db6d7d12f99997b584d09fad98e560b817a20dab6a526830e339f54cdb3", [:mix], [{:connection, "~> 1.0.2", [hex: :connection, optional: false]}, {:poolboy, "~> 1.5", [hex: :poolboy, optional: true]}, {:sbroker, "~> 1.0", [hex: :sbroker, optional: true]}]},
-  "decimal": {:hex, :decimal, "1.3.1", "157b3cedb2bfcb5359372a7766dd7a41091ad34578296e951f58a946fcab49c6", [:mix], []},
-  "earmark": {:hex, :earmark, "1.1.0", "8c2bf85d725050a92042bc1edf362621004d43ca6241c756f39612084e95487f", [:mix], []},
-  "ecto": {:hex, :ecto, "2.1.3", "ffb24e150b519a4c0e4c84f9eabc8587199389bc499195d5d1a93cd3b2d9a045", [:mix], [{:db_connection, "~> 1.1", [hex: :db_connection, optional: true]}, {:decimal, "~> 1.2", [hex: :decimal, optional: false]}, {:mariaex, "~> 0.8.0", [hex: :mariaex, optional: true]}, {:poison, "~> 2.2 or ~> 3.0", [hex: :poison, optional: true]}, {:poolboy, "~> 1.5", [hex: :poolboy, optional: false]}, {:postgrex, "~> 0.13.0", [hex: :postgrex, optional: true]}, {:sbroker, "~> 1.0", [hex: :sbroker, optional: true]}]},
-  "ex_doc": {:hex, :ex_doc, "0.14.5", "c0433c8117e948404d93ca69411dd575ec6be39b47802e81ca8d91017a0cf83c", [:mix], [{:earmark, "~> 1.0", [hex: :earmark, optional: false]}]},
-  "poison": {:hex, :poison, "3.1.0", "d9eb636610e096f86f25d9a46f35a9facac35609a7591b3be3326e99a0484665", [:mix], []},
-  "poolboy": {:hex, :poolboy, "1.5.1", "6b46163901cfd0a1b43d692657ed9d7e599853b3b21b95ae5ae0a777cf9b6ca8", [:rebar], []},
-  "postgrex": {:hex, :postgrex, "0.13.0", "e101ab47d0725955c5c8830ae8812412992e02e4bd9db09e17abb0a5d82d09c7", [:mix], [{:connection, "~> 1.0", [hex: :connection, optional: false]}, {:db_connection, "~> 1.1", [hex: :db_connection, optional: false]}, {:decimal, "~> 1.0", [hex: :decimal, optional: false]}]}}
+%{"connection": {:hex, :connection, "1.0.4", "a1cae72211f0eef17705aaededacac3eb30e6625b04a6117c1b2db6ace7d5976", [:mix], [], "hexpm"},
+  "db_connection": {:hex, :db_connection, "1.1.0", "b2b88db6d7d12f99997b584d09fad98e560b817a20dab6a526830e339f54cdb3", [:mix], [{:connection, "~> 1.0.2", [hex: :connection, repo: "hexpm", optional: false]}, {:poolboy, "~> 1.5", [hex: :poolboy, repo: "hexpm", optional: true]}, {:sbroker, "~> 1.0", [hex: :sbroker, repo: "hexpm", optional: true]}], "hexpm"},
+  "decimal": {:hex, :decimal, "1.3.1", "157b3cedb2bfcb5359372a7766dd7a41091ad34578296e951f58a946fcab49c6", [:mix], [], "hexpm"},
+  "earmark": {:hex, :earmark, "1.1.0", "8c2bf85d725050a92042bc1edf362621004d43ca6241c756f39612084e95487f", [:mix], [], "hexpm"},
+  "ecto": {:hex, :ecto, "2.1.3", "ffb24e150b519a4c0e4c84f9eabc8587199389bc499195d5d1a93cd3b2d9a045", [:mix], [{:db_connection, "~> 1.1", [hex: :db_connection, repo: "hexpm", optional: true]}, {:decimal, "~> 1.2", [hex: :decimal, repo: "hexpm", optional: false]}, {:mariaex, "~> 0.8.0", [hex: :mariaex, repo: "hexpm", optional: true]}, {:poison, "~> 2.2 or ~> 3.0", [hex: :poison, repo: "hexpm", optional: true]}, {:poolboy, "~> 1.5", [hex: :poolboy, repo: "hexpm", optional: false]}, {:postgrex, "~> 0.13.0", [hex: :postgrex, repo: "hexpm", optional: true]}, {:sbroker, "~> 1.0", [hex: :sbroker, repo: "hexpm", optional: true]}], "hexpm"},
+  "ex_doc": {:hex, :ex_doc, "0.14.5", "c0433c8117e948404d93ca69411dd575ec6be39b47802e81ca8d91017a0cf83c", [:mix], [{:earmark, "~> 1.0", [hex: :earmark, repo: "hexpm", optional: false]}], "hexpm"},
+  "poison": {:hex, :poison, "3.1.0", "d9eb636610e096f86f25d9a46f35a9facac35609a7591b3be3326e99a0484665", [:mix], [], "hexpm"},
+  "poolboy": {:hex, :poolboy, "1.5.1", "6b46163901cfd0a1b43d692657ed9d7e599853b3b21b95ae5ae0a777cf9b6ca8", [:rebar], [], "hexpm"},
+  "postgrex": {:hex, :postgrex, "0.13.0", "e101ab47d0725955c5c8830ae8812412992e02e4bd9db09e17abb0a5d82d09c7", [:mix], [{:connection, "~> 1.0", [hex: :connection, repo: "hexpm", optional: false]}, {:db_connection, "~> 1.1", [hex: :db_connection, repo: "hexpm", optional: false]}, {:decimal, "~> 1.0", [hex: :decimal, repo: "hexpm", optional: false]}], "hexpm"}}