diff --git a/lib/rinda/rinda.gemspec b/lib/rinda/rinda.gemspec
index 0c13e3c2df..e9f53dd864 100644
--- a/lib/rinda/rinda.gemspec
+++ b/lib/rinda/rinda.gemspec
@@ -1,6 +1,13 @@
+name = File.basename(__FILE__, ".gemspec")
+version = ["lib/rinda", "."].find do |dir|
+  break File.foreach(File.join(__dir__, dir, "#{name}.rb")) do |line|
+    /^\s*VERSION\s*=\s*"(.*)"/ =~ line and break $1
+  end rescue nil
+end
+
 Gem::Specification.new do |spec|
-  spec.name          = "rinda"
-  spec.version       = "0.1.1"
+  spec.name          = name
+  spec.version       = version
   spec.authors       = ["Masatoshi SEKI"]
   spec.email         = ["seki@ruby-lang.org"]
 
diff --git a/lib/rinda/rinda.rb b/lib/rinda/rinda.rb
index e762286d3b..ac3444244d 100644
--- a/lib/rinda/rinda.rb
+++ b/lib/rinda/rinda.rb
@@ -18,6 +18,8 @@ require 'drb/drb'
 
 module Rinda
 
+  VERSION = "0.1.1"
+
   ##
   # Rinda error base class