diff --git a/gnu/packages/ebook.scm b/gnu/packages/ebook.scm
index ad615acc86..43a7b9f034 100644
--- a/gnu/packages/ebook.scm
+++ b/gnu/packages/ebook.scm
@@ -60,7 +60,7 @@ (define-public chmlib
 (define-public calibre
   (package
     (name "calibre")
-    (version "2.37.1")
+    (version "2.40.0")
     (source
       (origin
         (method url-fetch)
@@ -69,7 +69,7 @@ (define-public calibre
                             version ".tar.xz"))
         (sha256
           (base32
-           "0cbpkhchxjz9dz4chkrlgq0q1sjmyp6lm9vrhnm2mwai61kzn25s"))
+           "1xzf910w3c15vajnlra32xzi0gwb4z7a9m9w5nfj0by2wss3fv7n"))
         ;; Remove non-free or doubtful code, see
         ;; https://lists.gnu.org/archive/html/guix-devel/2015-02/msg00478.html
         (modules '((guix build utils)))