diff --git a/CHANGELOG.md b/CHANGELOG.md
index 35c67a4..3cfdfbb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,20 @@
 # Change Log
 
+## [1.11.6](https://github.com/skywinder/github-changelog-generator/tree/1.11.6) (2016-03-01)
+[Full Changelog](https://github.com/skywinder/github-changelog-generator/compare/1.11.5...1.11.6)
+
+**Fixed bugs:**
+
+- Can't build on Windows [\#340](https://github.com/skywinder/github-changelog-generator/issues/340)
+
+**Closed issues:**
+
+- install error "Not a git repository" [\#339](https://github.com/skywinder/github-changelog-generator/issues/339)
+
+**Merged pull requests:**
+
+- Gemspec: Calculate date using Date stdlib [\#343](https://github.com/skywinder/github-changelog-generator/pull/343) ([olleolleolle](https://github.com/olleolleolle))
+
 ## [1.11.5](https://github.com/skywinder/github-changelog-generator/tree/1.11.5) (2016-03-01)
 [Full Changelog](https://github.com/skywinder/github-changelog-generator/compare/1.11.4...1.11.5)
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 6a3e7df..d7a59c3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    github_changelog_generator (1.11.5)
+    github_changelog_generator (1.11.6)
       bundler (>= 1.7)
       colorize (~> 0.7)
       github_api (~> 0.12)
diff --git a/github_changelog_generator.gemspec b/github_changelog_generator.gemspec
index a8ad97a..d542c17 100644
--- a/github_changelog_generator.gemspec
+++ b/github_changelog_generator.gemspec
@@ -1,5 +1,5 @@
 # coding: utf-8
-
+require "date"
 lib = File.expand_path("../lib", __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 require "github_changelog_generator/version"
@@ -12,7 +12,7 @@ Gem::Specification.new do |spec|
   spec.required_ruby_version = ">= 1.9.3"
   spec.authors = ["Petr Korolev"]
   spec.email = "sky4winder+github_changelog_generator@gmail.com"
-  spec.date = `date +"%Y-%m-%d"`.strip!
+  spec.date = Date.today.iso8601
   spec.summary = "Script, that automatically generate changelog from your tags, issues, labels and pull requests."
   spec.description = "Changelog generation has never been so easy. Fully automate changelog generation - this gem generate change log file based on tags, issues and merged pull requests from Github issue tracker."
   spec.homepage = "https://github.com/skywinder/Github-Changelog-Generator"