diff --git a/src/calibre/gui2/store/stores/amazon_plugin.py b/src/calibre/gui2/store/stores/amazon_plugin.py
index a236823ddb..564fbda579 100644
--- a/src/calibre/gui2/store/stores/amazon_plugin.py
+++ b/src/calibre/gui2/store/stores/amazon_plugin.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 
 from __future__ import (unicode_literals, division, absolute_import, print_function)
-store_version = 1 # Needed for dynamic plugin loading
+store_version = 2 # Needed for dynamic plugin loading
 
 __license__ = 'GPL 3'
 __copyright__ = '2011, John Schember <john@nachtimwald.com>'
diff --git a/src/calibre/gui2/store/stores/gutenberg_plugin.py b/src/calibre/gui2/store/stores/gutenberg_plugin.py
index 4ac8c8e0ba..b057cfe50f 100644
--- a/src/calibre/gui2/store/stores/gutenberg_plugin.py
+++ b/src/calibre/gui2/store/stores/gutenberg_plugin.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 
 from __future__ import (unicode_literals, division, absolute_import, print_function)
-store_version = 1 # Needed for dynamic plugin loading
+store_version = 2 # Needed for dynamic plugin loading
 
 __license__ = 'GPL 3'
 __copyright__ = '2011, John Schember <john@nachtimwald.com>'