diff --git a/asdf.asd b/asdf.asd
index 111240528088509b9a917cd9f5fac8e7c4095f16..038969c757798c6fab27c0208ca4d4b70d1b8818 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 "3.1.5.19" ;; to be automatically updated by make bump-version
+  :version "3.1.5.20" ;; to be automatically updated by make bump-version
   :depends-on ()
   #+asdf3 :encoding #+asdf3 :utf-8
   :class #+asdf3.1 package-inferred-system #-asdf3.1 system
diff --git a/header.lisp b/header.lisp
index 8a02c686dbe8f151c3291589b51871307a3cb842..111afa57235acc67fe1b081af91d99feda3dfb87 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 3.1.5.19: Another System Definition Facility.
+;;; This is ASDF 3.1.5.20: Another System Definition Facility.
 ;;;
 ;;; Feedback, bug reports, and patches are all welcome:
 ;;; please mail to <asdf-devel@common-lisp.net>.
diff --git a/uiop/version.lisp-expr b/uiop/version.lisp-expr
index a2303db4e3ebba42b4cbc74369cbc8d955871158..dc279bdc5aa33430a08f823fc888abebb4e6fabc 100644
--- a/uiop/version.lisp-expr
+++ b/uiop/version.lisp-expr
@@ -1,2 +1,2 @@
-"3.1.5.19"
+"3.1.5.20"
 
diff --git a/upgrade.lisp b/upgrade.lisp
index feb31bdd6e75865480d85680abbdd756c3469d90..dc68763d56f4dd1e2696084cf6c3832434aa6340 100644
--- a/upgrade.lisp
+++ b/upgrade.lisp
@@ -67,7 +67,7 @@ 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 "3.1.5.19")
+         (asdf-version "3.1.5.20")
          (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 a2303db4e3ebba42b4cbc74369cbc8d955871158..dc279bdc5aa33430a08f823fc888abebb4e6fabc 100644
--- a/version.lisp-expr
+++ b/version.lisp-expr
@@ -1,2 +1,2 @@
-"3.1.5.19"
+"3.1.5.20"