diff --git a/asdf.asd b/asdf.asd
index 6c5d7d11634ab83f62c68d619cc31002ed7d9dc0..a0484881d75955b24d52053ecb253636861e165e 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 "3.1.5.4" ;; to be automatically updated by make bump-version
+  :version "3.1.5.5" ;; 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 8b46289c1b1db3795039086f4d3320172456f639..4d93362797d60c08eae11b88ab17aebb9ebb958b 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 3.1.5.4: Another System Definition Facility.
+;;; This is ASDF 3.1.5.5: 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 cf0c72815ef5cd1ca2bb0290e37625b961b18ce5..1dec78862d146c76f6d6c792b17bba59e6b68f2e 100644
--- a/uiop/version.lisp-expr
+++ b/uiop/version.lisp-expr
@@ -1,2 +1,2 @@
-"3.1.5.4"
+"3.1.5.5"
 
diff --git a/upgrade.lisp b/upgrade.lisp
index 3917bbd5194406b85bc4e92483dde73999a76d0f..c47b45aa44502c084f8fe5ef6b3c4efcacfa4135 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 "3.1.5.4")
+         (asdf-version "3.1.5.5")
          (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 cf0c72815ef5cd1ca2bb0290e37625b961b18ce5..1dec78862d146c76f6d6c792b17bba59e6b68f2e 100644
--- a/version.lisp-expr
+++ b/version.lisp-expr
@@ -1,2 +1,2 @@
-"3.1.5.4"
+"3.1.5.5"