diff --git a/asdf.asd b/asdf.asd
index fd24da3bc72c342f7df6fd08206f5c9755d263a5..b1eba794eb15647ad82760e7c9f2ea159685c719 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 "3.1.0.19" ;; to be automatically updated by make bump-version
+  :version "3.1.0.20" ;; 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 e83443e0842f49f016dbaf24a66b479c8f23cab0..7ad332b6c10430a615928111824544ecb9c38820 100644
--- a/header.lisp
+++ b/header.lisp
@@ -1,5 +1,5 @@
 ;;; -*- mode: Common-Lisp; Base: 10 ; Syntax: ANSI-Common-Lisp -*-
-;;; This is ASDF 3.1.0.19: Another System Definition Facility.
+;;; This is ASDF 3.1.0.20: 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 34e0b93862a403e675870d1edbee51d73e465756..8e8f26d228a097812d8b1cbb8bb0470517ed5eb1 100644
--- a/upgrade.lisp
+++ b/upgrade.lisp
@@ -52,7 +52,7 @@ 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 upstream 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 "3.1.0.19")
+         (asdf-version "3.1.0.20")
          (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 5d1d061c9e6a147d284f11736383383f15abdfd3..77b46f87d9e980866218d9c303219af6514e4c7e 100644
--- a/version.lisp-expr
+++ b/version.lisp-expr
@@ -1,2 +1,2 @@
-"3.1.0.19"
+"3.1.0.20"