diff --git a/lib/acts_as_redeemable.rb b/lib/acts_as_redeemable.rb
index 2d2dec8..10dd3ba 100644
--- a/lib/acts_as_redeemable.rb
+++ b/lib/acts_as_redeemable.rb
@@ -1,4 +1,5 @@
 require 'activerecord'
+require 'readable_random'
 
 module ActsAsRedeemable
   def self.included(base)
@@ -40,7 +41,7 @@ def acts_as_redeemable(options = {})
       # Generates an alphanumeric code using an MD5 hash
       # * +code_length+ - number of characters to return
       def generate_code(code_length=6)
-        ActiveSupport::SecureRandom.base64(code_length).first(code_length).downcase
+        ReadableRandom.get(code_length)
       end
 
       # Generates unique code based on +generate_code+ method
diff --git a/spec/acts_as_redeemable_spec.rb b/spec/acts_as_redeemable_spec.rb
index dad250e..97af6a1 100644
--- a/spec/acts_as_redeemable_spec.rb
+++ b/spec/acts_as_redeemable_spec.rb
@@ -36,11 +36,11 @@
     end
 
     it "generates a unique code" do
-      ActiveSupport::SecureRandom.should_receive(:base64).and_return 'a'
+      ReadableRandom.should_receive(:get).and_return 'a'
       FreeTodayCoupon.create!(:user_id => 1).code.should == 'a'
 
-      ActiveSupport::SecureRandom.should_receive(:base64).and_return 'a'
-      ActiveSupport::SecureRandom.should_receive(:base64).and_return 'b'
+      ReadableRandom.should_receive(:get).and_return 'a'
+      ReadableRandom.should_receive(:get).and_return 'b'
       FreeTodayCoupon.create!(:user_id => 1).code.should == 'b'
     end
   end