2 files changed, 12 insertions, 2 deletions
diff --git a/lib/securerandom.gemspec b/lib/securerandom.gemspec
index e095244ce9..f42ddbcc97 100644
--- a/lib/securerandom.gemspec
+++ b/lib/securerandom.gemspec
@@ -1,6 +1,13 @@
+name = File.basename(__FILE__, ".gemspec")
+version = ["lib", Array.new(name.count("-")+1).join("/")].find do |dir|
+  break File.foreach(File.join(__dir__, dir, "#{name.tr('-', '/')}.rb")) do |line|
+    /^\s*VERSION\s*=\s*"(.*)"/ =~ line and break $1
+  end rescue nil
+end
+
 Gem::Specification.new do |spec|
-  spec.name          = "securerandom"
-  spec.version       = "0.2.2"
+  spec.name          = name
+  spec.version       = version
   spec.authors       = ["Tanaka Akira"]
   spec.email         = ["akr@fsij.org"]
 
diff --git a/lib/securerandom.rb b/lib/securerandom.rb
index c5be6ce734..9faa09e4e0 100644
--- a/lib/securerandom.rb
+++ b/lib/securerandom.rb
@@ -39,6 +39,9 @@ require 'random/formatter'
 # +NotImplementedError+ is raised.
 
 module SecureRandom
+
+  VERSION = "0.2.2"
+
   class << self
     def bytes(n)
       return gen_random(n)