diff --git a/lib/ey_config/local.rb b/lib/ey_config/local.rb
index 20baaed..3ae982e 100644
--- a/lib/ey_config/local.rb
+++ b/lib/ey_config/local.rb
@@ -1,4 +1,5 @@
 require 'fileutils'
+require 'yaml'
 
 module EY
   class Config
@@ -12,7 +13,7 @@ def generate(*args)
           contents = existing_contents
           contents = {} unless contents.is_a?(Hash)
           tmp = contents
-          
+
           args[0 ... -1].each do |arg|
             tmp[arg] ||= {}
             tmp = tmp[arg]
diff --git a/spec/ey_config_spec.rb b/spec/ey_config_spec.rb
index 196e58b..207638c 100644
--- a/spec/ey_config_spec.rb
+++ b/spec/ey_config_spec.rb
@@ -37,7 +37,7 @@ def set_config_paths(first_config, second_config)
       end
 
       it "prevents accidentally modifying the config" do
-        lambda{ EY::Config.get(:some_app)["foo"] = "BADDATA" }.should raise_error TypeError
+        lambda{ EY::Config.get(:some_app)["foo"] = "BADDATA" }.should raise_error /can't modify frozen Hash/
       end
 
       it "raises and warns for nonexistent keys" do
@@ -114,6 +114,6 @@ def set_config_paths(first_config, second_config)
     EY::Config.config_path = first_config.path
     File.chmod(0333, first_config.path)
 
-    expect { EY::Config.init }.to raise_error    
+    expect { EY::Config.init }.to raise_error
   end
-end
\ No newline at end of file
+end