From 4da560e0ffdb1467ae419a476f67eb58d4a8cbda Mon Sep 17 00:00:00 2001
From: Mirko Westermeier <mirko@westermeier.de>
Date: Wed, 21 Nov 2018 17:09:53 +0100
Subject: [PATCH 1/2] Add compatibility warning to README

---
 README.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/README.md b/README.md
index 48ebd21..010c3c4 100644
--- a/README.md
+++ b/README.md
@@ -41,6 +41,12 @@ $store->store_event(UserAdded => {id => 17, name => 'Bob'});
 say 'His name is ' . $store->snapshot->state->{users}{17}{name}; # Bob
 ```
 
+**ATTENTION**: From version 0.6 on the serialization format is changed from [Storable][] to [YAML][]. Use [convert_storable_to_yaml.pl][script] to use your old event store with newer versions.
+
+[Storable]: https://metacpan.org/pod/Storable
+[YAML]: https://metacpan.org/pod/YAML::XS
+[script]: convert_storable_to_yaml.pl
+
 ## Intro
 
 In Event Sourcing, the state of a system is calculated as the application of a stream of events representing each change of the system. This framework is a minimal approach to use these mechanics in simple perl systems.

From b4c8dad574b8852bee0db2d1df0c67a19a3623d9 Mon Sep 17 00:00:00 2001
From: Mirko Westermeier <mirko@westermeier.de>
Date: Wed, 21 Nov 2018 17:10:03 +0100
Subject: [PATCH 2/2] Add dependency

---
 Makefile.PL | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Makefile.PL b/Makefile.PL
index 5f8ce4b..5327bbd 100644
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -24,6 +24,7 @@ WriteMakefile(
         'Data::Compare' => '1.25',
         'Data::Dump'    => '1.23',
         'UUID::Tiny'    => '1.04',
+        'YAML::XS'      => '0.75',
     },
     TEST_REQUIRES       => {
         'Test::Pod'             => '1.52',