diff --git a/gnu/packages/mail.scm b/gnu/packages/mail.scm
index 32483eaa6d..ce4824ef09 100644
--- a/gnu/packages/mail.scm
+++ b/gnu/packages/mail.scm
@@ -1015,7 +1015,7 @@ (define-public claws-mail
     (source (origin
               (method url-fetch)
               (uri (string-append
-                    "http://www.claws-mail.org/releases/" name "-" version
+                    "https://www.claws-mail.org/releases/" name "-" version
                     ".tar.xz"))
               (sha256
                (base32
@@ -1065,7 +1065,7 @@ (define-public claws-mail
 other popular email clients, as well as experienced users.  Almost all commands
 are accessible with the keyboard.  Plus, Claws-Mail is extensible via addons
 which can add many functionalities to the base client.")
-    (home-page "http://www.claws-mail.org/")
+    (home-page "https://www.claws-mail.org/")
     (license gpl3+))) ; most files are actually public domain or x11
 
 (define-public msmtp