diff --git a/asdf.asd b/asdf.asd
index eb41a9153f3efcb2207d7cf768d61201e45a7865..1e27d52f26890ae9a213df9069b17017079cb7cb 100644
--- a/asdf.asd
+++ b/asdf.asd
@@ -75,7 +75,7 @@
   :licence "MIT"
   :description "Another System Definition Facility"
   :long-description "ASDF builds Common Lisp software organized into defined systems."
-  :version "3.1.0.63" ;; to be automatically updated by make bump-version
+  :version "3.1.0.64" ;; to be automatically updated by make bump-version
   :depends-on ()
   #+asdf3 :encoding #+asdf3 :utf-8
   :class #.(if (find-class 'package-system nil) 'package-system 'system)
diff --git a/header.lisp b/header.lisp
index 2e1c8ed4fe297b6f02bb72b05201c16208eaafbe..321386d8157e87556c422a0ba3ad5fca197d8906 100644
--- a/header.lisp
+++ b/header.lisp
@@ -1,5 +1,5 @@
 ;;; -*- mode: Common-Lisp; Base: 10 ; Syntax: ANSI-Common-Lisp ; buffer-read-only: t; -*-
-;;; This is ASDF 3.1.0.63: Another System Definition Facility.
+;;; This is ASDF 3.1.0.64: Another System Definition Facility.
 ;;;
 ;;; Feedback, bug reports, and patches are all welcome:
 ;;; please mail to <asdf-devel@common-lisp.net>.
diff --git a/upgrade.lisp b/upgrade.lisp
index 08e27f922beba7b308d460c233c8c1d8a5ceb772..75fe39c6932371a34fc40fbf6b0c4404f59574d1 100644
--- a/upgrade.lisp
+++ b/upgrade.lisp
@@ -66,7 +66,7 @@ previously-loaded version of ASDF."
          ;; "3.4.5.67" would be a development version in the official branch, on top of 3.4.5.
          ;; "3.4.5.0.8" would be your eighth local modification of official release 3.4.5
          ;; "3.4.5.67.8" would be your eighth local modification of development version 3.4.5.67
-         (asdf-version "3.1.0.63")
+         (asdf-version "3.1.0.64")
          (existing-version (asdf-version)))
     (setf *asdf-version* asdf-version)
     (when (and existing-version (not (equal asdf-version existing-version)))
diff --git a/version.lisp-expr b/version.lisp-expr
index acc6ef3a5174f8d7659ad059f9d7b925e82934c8..28fd09c7821c16568c63fd72610caedb02b4b54b 100644
--- a/version.lisp-expr
+++ b/version.lisp-expr
@@ -1,2 +1,2 @@
-"3.1.0.63"
+"3.1.0.64"