diff --git a/lib/dep-graph.js b/lib/dep-graph.js
index a93cf93..d3b2401 100644
--- a/lib/dep-graph.js
+++ b/lib/dep-graph.js
@@ -1,16 +1,16 @@
+// Generated by CoffeeScript 1.3.3
 (function() {
-  var DepGraph, _;
-  var __indexOf = Array.prototype.indexOf || function(item) {
-    for (var i = 0, l = this.length; i < l; i++) {
-      if (this[i] === item) return i;
-    }
-    return -1;
-  }, __bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; };
+  var DepGraph, _,
+    __indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i++) { if (i in this && this[i] === item) return i; } return -1; };
+
   _ = require('underscore');
+
   DepGraph = (function() {
+
     function DepGraph() {
       this.map = {};
     }
+
     DepGraph.prototype.add = function(id, depId) {
       var _base, _ref;
       if ((_ref = (_base = this.map)[id]) == null) {
@@ -22,24 +22,28 @@
       this.map[id].push(depId);
       return this.map[id];
     };
+
     DepGraph.prototype.getChain = function(id) {
-      var chain, deps, leafNode, visit, visited, _i, _len, _ref;
+      var chain, deps, leafNode, visit, visited, _i, _len, _ref,
+        _this = this;
       deps = this.descendantsOf(id);
       chain = [];
       visited = {};
-      visit = __bind(function(node) {
+      visit = function(node) {
         var parent, _i, _len, _ref;
         if (visited[node] || node === id) {
           return;
         }
         visited[node] = true;
-        _ref = this.parentsOf(node);
+        _ref = _this.parentsOf(node);
         for (_i = 0, _len = _ref.length; _i < _len; _i++) {
           parent = _ref[_i];
-          visit(parent);
+          if (__indexOf.call(deps, parent) >= 0) {
+            visit(parent);
+          }
         }
         return chain.unshift(node);
-      }, this);
+      };
       _ref = _.intersection(deps, this.leafNodes()).reverse();
       for (_i = 0, _len = _ref.length; _i < _len; _i++) {
         leafNode = _ref[_i];
@@ -47,6 +51,7 @@
       }
       return chain;
     };
+
     DepGraph.prototype.leafNodes = function() {
       var allNodes, node, _i, _len, _ref, _results;
       allNodes = _.uniq(_.flatten(_.values(this.map)));
@@ -59,6 +64,7 @@
       }
       return _results;
     };
+
     DepGraph.prototype.parentsOf = function(child) {
       var node, _i, _len, _ref, _results;
       _ref = _.keys(this.map);
@@ -71,8 +77,9 @@
       }
       return _results;
     };
+
     DepGraph.prototype.descendantsOf = function(parent, descendants, branch) {
-      var child, _i, _len, _ref, _ref2;
+      var child, _i, _len, _ref, _ref1;
       if (descendants == null) {
         descendants = [];
       }
@@ -81,9 +88,9 @@
       }
       descendants.push(parent);
       branch.push(parent);
-      _ref2 = (_ref = this.map[parent]) != null ? _ref : [];
-      for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
-        child = _ref2[_i];
+      _ref1 = (_ref = this.map[parent]) != null ? _ref : [];
+      for (_i = 0, _len = _ref1.length; _i < _len; _i++) {
+        child = _ref1[_i];
         if (__indexOf.call(branch, child) >= 0) {
           throw new Error("Cyclic dependency from " + parent + " to " + child);
         }
@@ -94,11 +101,15 @@
       }
       return descendants.slice(1);
     };
+
     return DepGraph;
+
   })();
+
   if ((typeof module !== "undefined" && module !== null ? module.exports : void 0) != null) {
     module.exports = DepGraph;
   } else {
     this.DepGraph = DepGraph;
   }
+
 }).call(this);
diff --git a/src/dep-graph.coffee b/src/dep-graph.coffee
index 2363396..fcff3a1 100644
--- a/src/dep-graph.coffee
+++ b/src/dep-graph.coffee
@@ -27,8 +27,7 @@ class DepGraph
     visit = (node) =>
       return if visited[node] or node is id
       visited[node] = true
-      for parent in @parentsOf(node)
-        visit parent
+      visit parent for parent in @parentsOf(node) when parent in deps
       chain.unshift node
 
     for leafNode in _.intersection(deps, @leafNodes()).reverse()
@@ -57,4 +56,4 @@ class DepGraph
 if module?.exports?
   module.exports = DepGraph
 else
-  @DepGraph = DepGraph
\ No newline at end of file
+  @DepGraph = DepGraph