diff --git a/lib/bing.js b/lib/bing.js
index 55a21c8..0eb5420 100644
--- a/lib/bing.js
+++ b/lib/bing.js
@@ -77,7 +77,9 @@ var Bing = function (options) {
     + "&$top=" + opts.top
     + "&$skip=" + opts.skip
     + "&Options=%27" + (opts.options || []).join('%2B') + "%27"
-    + (opts.sources ? "&Sources=%27" + opts.sources + "%27" : '')
+    + (opts.sources
+        ? "&Sources=%27" + encodeURIComponent(opts.sources) + "%27"
+        : '')
     + (opts.newsSortBy ? "&NewsSortBy=%27" + opts.newsSortBy + "%27" : '')
     + (opts.newsCategory ? "&NewsCategory=%27" + opts.newsCategory + "%27" : '')
       + (opts.newsLocationOverride
diff --git a/test/integration.js b/test/integration.js
index 46d8e50..7e75ca4 100644
--- a/test/integration.js
+++ b/test/integration.js
@@ -136,6 +136,35 @@ describe("Bing News", function () {
 });
 
 
+describe("Bing Composite", function () {
+
+  this.timeout(1000 * 10);
+
+  it('finds composite search', function (done) {
+
+    Bing.composite('animal',
+              {
+                sources: 'web+news',
+                skip: 1,
+                newSortBy: 'Date'
+              },
+              function (err, res, body) {
+
+      //TODO try unaccepted options like imageFilters
+
+      should.not.exist(err);
+      should.exist(res);
+      should.exist(body);
+
+      body.d.results.should.have.length(1);
+
+      done();
+    });
+  });
+
+});
+
+
 describe("Bing Video", function () {
 
   this.timeout(1000 * 10);