diff --git a/.abf.yml b/.abf.yml
index d4b5708..bf79c7a 100644
--- a/.abf.yml
+++ b/.abf.yml
@@ -1,2 +1,2 @@
 sources:
-  calibre-2.55.0.tar.xz: 70108800829bd87d2f52486f634690afa61d1ea0
+  calibre-2.56.0.tar.xz: 37e21fcd786e14a7a8eef86a72dbede67c9f003a