diff --git a/Gemfile.lock b/Gemfile.lock
index 1d6c8dd..42ab508 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,28 +2,23 @@ PATH
   remote: .
   specs:
     signature (0.1.2)
-      ruby-hmac
 
 GEM
   remote: http://rubygems.org/
   specs:
-    diff-lcs (1.1.2)
-    rspec (2.0.1)
-      rspec-core (~> 2.0.1)
-      rspec-expectations (~> 2.0.1)
-      rspec-mocks (~> 2.0.1)
-    rspec-core (2.0.1)
-    rspec-expectations (2.0.1)
-      diff-lcs (>= 1.1.2)
-    rspec-mocks (2.0.1)
-      rspec-core (~> 2.0.1)
-      rspec-expectations (~> 2.0.1)
-    ruby-hmac (0.4.0)
+    diff-lcs (1.1.3)
+    rspec (2.9.0)
+      rspec-core (~> 2.9.0)
+      rspec-expectations (~> 2.9.0)
+      rspec-mocks (~> 2.9.0)
+    rspec-core (2.9.0)
+    rspec-expectations (2.9.1)
+      diff-lcs (~> 1.1.3)
+    rspec-mocks (2.9.0)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  rspec (~> 2.0.0)
-  ruby-hmac
+  rspec (~> 2.9.0)
   signature!
diff --git a/signature.gemspec b/signature.gemspec
index accf999..48eb387 100644
--- a/signature.gemspec
+++ b/signature.gemspec
@@ -17,6 +17,5 @@ Gem::Specification.new do |s|
   s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
   s.require_paths = ["lib"]
 
-  s.add_dependency "ruby-hmac"
-  s.add_development_dependency "rspec", "~> 2.0.0"
+  s.add_development_dependency "rspec", "~> 2.9.0"
 end