diff --git a/pelicanconf.py b/pelicanconf.py
index 2d2267e..8d6b26d 100644
--- a/pelicanconf.py
+++ b/pelicanconf.py
@@ -55,6 +55,8 @@ DEFAULT_LANG = "en"
 
 # Atom all feed.
 FEED_ALL_ATOM = "feeds/all.atom.xml"
+# Include all posts in feed (no limit) for blog.json generation
+FEED_MAX_ITEMS = None
 
 # Feed generation is usually not desired when developing
 CATEGORY_FEED_ATOM = None