diff --git a/src/calibre/trac/plugins/Changelog.py b/src/calibre/trac/plugins/Changelog.py
index 73346c0b78..2d3ba45d81 100644
--- a/src/calibre/trac/plugins/Changelog.py
+++ b/src/calibre/trac/plugins/Changelog.py
@@ -18,7 +18,7 @@ class ChangelogFormatter(blog.LogFormatter):
     
     supports_tags = True
     
-    def __init__(self, num_of_versions=10):
+    def __init__(self, num_of_versions=20):
         self.num_of_versions = num_of_versions
         self.messages = collections.deque()
         self.entries = []