diff --git a/README.md b/README.md
index 982002c..d8e468e 100644
--- a/README.md
+++ b/README.md
@@ -11,10 +11,10 @@ Liquid is a template engine which was written with very specific requirements:
 ## Why you should use Liquid
 
 * You want to allow your users to edit the appearance of your application but don't want them to run **insecure code on your server**.
-* You want to render templates directly from the database
-* You like smarty (PHP) style template engines
-* You need a template engine which does HTML just as well as emails
-* You don't like the markup of your current templating engine
+* You want to render templates directly from the database.
+* You like smarty (PHP) style template engines.
+* You need a template engine which does HTML just as well as emails.
+* You don't like the markup of your current templating engine.
 
 ## What does it look like?
 
@@ -31,7 +31,7 @@ Liquid is a template engine which was written with very specific requirements:
 </ul>
 ```
 
-## Howto use Liquid
+## How to use Liquid
 
 Liquid supports a very simple API based around the Liquid::Template class.
 For standard use you can just pass it the content of a file and call render with a parameters hash.
diff --git a/lib/liquid/context.rb b/lib/liquid/context.rb
index 1075c4e..1d5290a 100644
--- a/lib/liquid/context.rb
+++ b/lib/liquid/context.rb
@@ -136,11 +136,11 @@ module Liquid
             $1
           when /^"(.*)"$/ # Double quoted strings
             $1
-          when /^(\d+)$/ # Integer and floats
+          when /^(-?\d+)$/ # Integer and floats
             $1.to_i
           when /^\((\S+)\.\.(\S+)\)$/ # Ranges
             (resolve($1).to_i..resolve($2).to_i)
-          when /^(\d[\d\.]+)$/ # Floats
+          when /^(-?\d[\d\.]+)$/ # Floats
             $1.to_f
           else
             variable(key)
diff --git a/test/liquid/condition_test.rb b/test/liquid/condition_test.rb
index 7dd096e..52a0e03 100644
--- a/test/liquid/condition_test.rb
+++ b/test/liquid/condition_test.rb
@@ -18,6 +18,11 @@ class ConditionTest < Test::Unit::TestCase
     assert_evalutes_true '2', '>=', '1'
     assert_evalutes_true '1', '<=', '2'
     assert_evalutes_true '1', '<=', '1'
+    # negative numbers
+    assert_evalutes_true '1', '>', '-1'
+    assert_evalutes_true '-1', '<', '1'
+    assert_evalutes_true '1.0', '>', '-1.0'
+    assert_evalutes_true '-1.0', '<', '1.0'
   end
 
   def test_default_operators_evalute_false