diff --git a/CHANGELOG.markdown b/CHANGELOG.markdown
index 3ce648d..22f768d 100644
--- a/CHANGELOG.markdown
+++ b/CHANGELOG.markdown
@@ -2,6 +2,8 @@
 
 ## unreleased
 
+## v0.11.1.20240914 (2024-09-14)
+
 * libpng 1.6.44 [@toy](https://github.com/toy)
 
 ## v0.11.1.20240713 (2024-07-13)
diff --git a/image_optim_pack.gemspec b/image_optim_pack.gemspec
index 14d078f..87653c8 100644
--- a/image_optim_pack.gemspec
+++ b/image_optim_pack.gemspec
@@ -2,7 +2,7 @@
 
 Gem::Specification.new do |s|
   s.name        = 'image_optim_pack'
-  s.version     = '0.11.1.20240713'
+  s.version     = '0.11.1.20240914'
   s.summary     = %q{Precompiled binaries for image_optim: advpng, gifsicle, jhead, jpeg-recompress, jpegoptim, jpegtran, optipng, oxipng, pngcrush, pngout, pngquant}
   s.homepage    = "https://github.com/toy/#{s.name}"
   s.authors     = ['Ivan Kuchin']