diff --git a/CHANGES.md b/CHANGES.md
index febeb5a..1c08aea 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,8 @@
+# 0.5.0 (2025-11-06)
+
+- AP-487: correctly declare mime type for mp3s
+- dependency updates and explicit support for ruby 3.3+ 
+
 # 0.4.3 (2025-11-04)
 
 - BerkeleyLibrary::AV::Metadata::Readers:TIND now uses the /api/v1/search endpoint to retrieve records. The public /search endpoint stopped working for non-browser/human clients in the past week due to TIND changes.
diff --git a/av_core.gemspec b/av_core.gemspec
index 269bbdb..3d70a7e 100644
--- a/av_core.gemspec
+++ b/av_core.gemspec
@@ -10,8 +10,8 @@ require 'berkeley_library/av/core/module_info'
 
 Gem::Specification.new do |spec|
   spec.name = BerkeleyLibrary::AV::Core::ModuleInfo::NAME
-  spec.author = BerkeleyLibrary::AV::Core::ModuleInfo::AUTHOR
-  spec.email = BerkeleyLibrary::AV::Core::ModuleInfo::AUTHOR_EMAIL
+  spec.authors = BerkeleyLibrary::AV::Core::ModuleInfo::AUTHORS
+  spec.email = BerkeleyLibrary::AV::Core::ModuleInfo::AUTHOR_EMAILS
   spec.summary = BerkeleyLibrary::AV::Core::ModuleInfo::SUMMARY
   spec.description = BerkeleyLibrary::AV::Core::ModuleInfo::DESCRIPTION
   spec.license = BerkeleyLibrary::AV::Core::ModuleInfo::LICENSE
diff --git a/lib/berkeley_library/av/core/module_info.rb b/lib/berkeley_library/av/core/module_info.rb
index dad1b11..c78f4b0 100644
--- a/lib/berkeley_library/av/core/module_info.rb
+++ b/lib/berkeley_library/av/core/module_info.rb
@@ -1,15 +1,17 @@
+# frozen_string_literal: true
+
 module BerkeleyLibrary
   module AV
     module Core
       class ModuleInfo
-        NAME = 'berkeley_library-av-core'.freeze
-        AUTHOR = 'David Moles'.freeze
-        AUTHOR_EMAIL = 'dmoles@berkeley.edu'.freeze
-        SUMMARY = 'UC Berkeley Library audio/video core code'.freeze
-        DESCRIPTION = 'Gem for UC Berkeley Library shared audio/video code'.freeze
-        LICENSE = 'MIT'.freeze
-        VERSION = '0.4.3'.freeze
-        HOMEPAGE = 'https://github.com/BerkeleyLibrary/av-core'.freeze
+        NAME = 'berkeley_library-av-core'
+        AUTHORS = ['David Moles', 'maría a. matienzo'].freeze
+        AUTHOR_EMAILS = ['dmoles@berkeley.edu', 'matienzo@berkeley.edu'].freeze
+        SUMMARY = 'UC Berkeley Library audio/video core code'
+        DESCRIPTION = 'Gem for UC Berkeley Library shared audio/video code'
+        LICENSE = 'MIT'
+        VERSION = '0.5.0'
+        HOMEPAGE = 'https://github.com/BerkeleyLibrary/av-core'
 
         private_class_method :new
       end