diff --git a/asdf.asd b/asdf.asd
index dd1efe1fee822423be7d97b1195f38da9f400912..7bede5785af419f1d34c9e99d4ee89460e5d14ab 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 "3.1.0.50" ;; to be automatically updated by make bump-version
+  :version "3.1.0.51" ;; 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 3659f15ae10f924ff904fbc851db9c1782d65114..8087e08f503a31667197ca30f4958594e2624d20 100644
--- a/header.lisp
+++ b/header.lisp
@@ -1,5 +1,5 @@
 ;;; -*- mode: Common-Lisp; Base: 10 ; Syntax: ANSI-Common-Lisp -*-
-;;; This is ASDF 3.1.0.50: Another System Definition Facility.
+;;; This is ASDF 3.1.0.51: 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 13eaa724bb181825aa8c1e1d8d29ad0f95aca10e..321a1658f4915bce9a0730789e4847ca59de6fe2 100644
--- a/upgrade.lisp
+++ b/upgrade.lisp
@@ -64,7 +64,7 @@ You can compare this string with e.g.: (ASDF:VERSION-SATISFIES (ASDF:ASDF-VERSIO
          ;; "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 "3.1.0.50")
+         (asdf-version "3.1.0.51")
          (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 ad4cd7269423487cd23e9f3f9282879aa29437cf..c56f604d13350e59621fedae93b12bc867e6754c 100644
--- a/version.lisp-expr
+++ b/version.lisp-expr
@@ -1,2 +1,2 @@
-"3.1.0.50"
+"3.1.0.51"