diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..d66ae0d
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,20 @@
+# Params Changelog
+
+
+
+## 1.1.0
+
+### Features
+
+* Add push method
+
+
+
+## 1.0.0
+
+Initial Params.
+
+### Features
+
+* Set a parameter
+* Prevent overriding of parameters in strict mode
diff --git a/README.md b/README.md
index b66c444..f0baa49 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,6 @@ params = new Params()
     ```javascript
     > params.set('enabled', true).set('inactive', false).set('name', 'Basil')
     ```
-    
 
 *   Get a parameter:
 
@@ -52,6 +51,25 @@ params = new Params()
     true
     ```
 
+*   Push a parameter:
+
+    ```javascript
+    > params.push('options', 'editable')
+    > params.push('options', 'fancy')
+    > params.push('options', 'pants')
+    > params.options
+    ['editable', 'fancy', 'pants']
+    ```
+
+*   Push a parameter:
+
+    ```javascript
+    > params.push('config.editor', 'title')
+    > params.push('config.editor', 'cover')
+    > params.config.editor
+    ['title', 'cover']
+    ```
+
 *   Get all parameters:
 
     ```javascript
@@ -69,7 +87,12 @@ params = new Params()
             b: {
                 c: true
             }
-        }
+        },
+        config: {
+            editor: ['title', 'cover']
+        },
+        options: ['editable', 'fancy', 'pants']
+
     }
     ```
 
@@ -82,4 +105,5 @@ params = new Params()
     Error: Param 'only_set_once' was already set with `true`
     > strict_params.only_set_once
     true
+    ```
 
diff --git a/package.json b/package.json
index 96a22a8..742a8a1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "params",
-    "version": "1.0.0",
+    "version": "1.1.0",
     "description": "",
     "dependencies": {
     },
diff --git a/source/params.coffee b/source/params.coffee
index 1313d3b..ed7590e 100644
--- a/source/params.coffee
+++ b/source/params.coffee
@@ -6,7 +6,7 @@ INTERNAL = ['set', 'getAll', '_strict']
 
 class Params
 
-    @VERSION = '1.0.0'
+    @VERSION = '1.1.0'
 
     constructor: (opts={}) ->
         @_strict = if opts.strict? then opts.strict else false
@@ -14,11 +14,14 @@ class Params
 
     # Public: set a parameter.
     #
-    # key   - a String key to set. MAY use dot notation to specify sub parameters.
-    # value - an arbitrary value to set
+    # key    - a String key to set. MAY use dot notation to specify sub parameters.
+    # value  - an arbitrary value to set
+    # kwargs - an object of optional arguments
+    #          push - a Boolean indicating the key is should be set to an Array
     #
     # Returns self for chaining.
-    set: (key, value) =>
+    set: (key, value, kwargs={}) =>
+
         if key in INTERNAL
             throw new Error("Cannot set the '#{ key }' param, silly.")
 
@@ -32,14 +35,23 @@ class Params
             key = key_list.shift()
 
             if typeof target_obj isnt 'object'
-                throw new Error("Cannot set subparameter '#{ prev_key }.#{ key }'. '#{ prev_key }' is not an object.")
+                if kwargs.push and not target_obj.push?
+                    throw new Error("Cannot push subparameter '#{ prev_key }.#{ key }'. '#{ prev_key }' is not an Array.")
+                else
+                    throw new Error("Cannot set subparameter '#{ prev_key }.#{ key }'. '#{ prev_key }' is not an object.")
 
             if key_list.length is 0
                 if target_obj[key]?
-                    if @_strict
-                        throw new Error("Param '#{ key }' was already set with `#{ target_obj[key] }`")
-                    console?.warn?("Param '#{ key }' overridden (`#{ target_obj[key] }` with `#{ value }`)")
-                target_obj[key] = value
+                    if not kwargs.push
+                        if @_strict
+                            throw new Error("Param '#{ key }' was already set with `#{ target_obj[key] }`")
+                        console?.warn?("Param '#{ key }' overridden (`#{ target_obj[key] }` with `#{ value }`)")
+                if kwargs.push
+                    unless target_obj[key]?
+                        target_obj[key] = []
+                    target_obj[key].push(value)
+                else
+                    target_obj[key] = value
 
             else
                 if not target_obj[key]?
@@ -49,6 +61,17 @@ class Params
 
         return this
 
+
+    # Public: push a parameter. If they key is not already set, it will be created.
+    #
+    # key    - a String key to set. MAY use dot notation to specify sub parameters.
+    # value  - an arbitrary value to set
+    #
+    # Returns self for chaining.
+    push: (key, value) =>
+        return @set(key, value, push: true)
+
+
     # Public: get all of the parameters. Used to avoid getting the internal
     # properties as well.
     #
diff --git a/test/test.coffee b/test/test.coffee
index 245b31b..7e6b080 100644
--- a/test/test.coffee
+++ b/test/test.coffee
@@ -47,6 +47,32 @@ describe 'Params', ->
         (-> params.set('getAll', 1)).should.throw()
         (-> params.set('_strict', 1)).should.throw()
 
+    it 'should push a parameter', ->
+        params = new Params()
+        params.push('key', 1)
+        params.key.should.eql([1])
+        params.push('key', 2)
+        params.key.should.eql([1, 2])
+
+    it 'should push a subparameter', ->
+        params = new Params()
+        params.push('key.subkey', 1)
+        params.key.subkey.should.eql([1])
+        params.push('key.subkey', 2)
+        params.key.subkey.should.eql([1, 2])
+
+    it 'should not push a sub parameter if parameter is not an Array', ->
+        params = new Params()
+        params.set('key', 1)
+        (-> params.push('key.foo', 1)).should.throw("Cannot push subparameter 'key.foo'. 'key' is not an Array.")
+        params.key.should.equal(1)
+
+        params = new Params()
+        params.set('key.foo', 1)
+        (-> params.push('key.foo.bar', 1)).should.throw("Cannot push subparameter 'foo.bar'. 'foo' is not an Array.")
+        params.key.foo.should.equal(1)
+
+
 # params = new Params()
 
 # console.log params.getAll()