diff --git a/Gemfile b/Gemfile
index 024ea4c..e1d620f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,8 +5,8 @@ gem "rake"
 gem "salama-reader" , :path => "."
 
 # use this for debugging, the printout is better (cut/paste)
-# gem "ast" , :github => "dancinglightning/ast"
-gem "ast"
+ gem "ast" , :github => "dancinglightning/ast"
+#gem "ast"
 
 # Add dependencies to develop your gem here.
 # Include everything needed to run rake, tests, features, etc.
diff --git a/Gemfile.lock b/Gemfile.lock
index d50872c..9354fe6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,3 +1,9 @@
+GIT
+  remote: git://github.com/dancinglightning/ast.git
+  revision: 846eb00aeb6d227ffbae7a3f5c3b286f60d11667
+  specs:
+    ast (2.1.0)
+
 PATH
   remote: .
   specs:
@@ -8,7 +14,6 @@ PATH
 GEM
   remote: http://rubygems.org/
   specs:
-    ast (2.1.0)
     blankslate (3.1.3)
     codeclimate-test-reporter (0.4.6)
       simplecov (>= 0.7.1, < 1.0.0)
@@ -29,7 +34,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  ast
+  ast!
   codeclimate-test-reporter
   minitest
   rake