diff --git a/lib/storage-policy.js b/lib/storage-policy.js
old mode 100644
new mode 100755
index f7a1c3e..093d040
--- a/lib/storage-policy.js
+++ b/lib/storage-policy.js
@@ -101,7 +101,7 @@ Slingshot.StoragePolicy = function () {
 
     stringify: function (encoding) {
       /* global Buffer: false */
-      return Buffer(JSON.stringify(policy), "utf-8")
+      return new Buffer.from(JSON.stringify(policy), "utf-8")
         .toString(encoding || "base64");
     }
   });
diff --git a/package.js b/package.js
old mode 100644
new mode 100755
index 1fdec4e..350e5cc
--- a/package.js
+++ b/package.js
@@ -5,20 +5,20 @@ Package.describe({
   git: "https://github.com/CulturalMe/meteor-slingshot"
 });
 
-Package.on_use(function (api) {
+Package.onUse(function (api) {
   api.versionsFrom('METEOR@1.0');
 
   api.use(["underscore", "check"]);
   api.use(["tracker", "reactive-var"], "client");
 
-  api.add_files([
+  api.addFiles([
     "lib/restrictions.js",
     "lib/validators.js"
   ]);
 
-  api.add_files("lib/upload.js", "client");
+  api.addFiles("lib/upload.js", "client");
 
-  api.add_files([
+  api.addFiles([
     "lib/directive.js",
     "lib/storage-policy.js",
     "services/aws-s3.js",
@@ -29,7 +29,7 @@ Package.on_use(function (api) {
   api.export("Slingshot");
 });
 
-Package.on_test(function (api) {
+Package.onTest(function (api) {
   api.use(["tinytest", "underscore", "edgee:slingshot"]);
-  api.add_files("test/aws-s3.js", "server");
+  api.addFiles("test/aws-s3.js", "server");
 });
diff --git a/services/aws-s3.js b/services/aws-s3.js
old mode 100644
new mode 100755
index fd17f19..fd1e745
--- a/services/aws-s3.js
+++ b/services/aws-s3.js
@@ -230,6 +230,6 @@ function hmac256(key, data, encoding) {
   /* global Buffer: false */
   return crypto
     .createHmac("sha256", key)
-    .update(new Buffer(data, "utf-8"))
+    .update(new Buffer.from(data, "utf-8"))
     .digest(encoding);
 }
diff --git a/services/rackspace.js b/services/rackspace.js
old mode 100644
new mode 100755
index 460e8d3..8bd2ebe
--- a/services/rackspace.js
+++ b/services/rackspace.js
@@ -106,7 +106,7 @@ Slingshot.RackspaceFiles = {
 
     return Npm.require("crypto")
       .createHmac("sha1", secretkey)
-      .update(new Buffer(policy, "utf-8"))
+      .update(new Buffer.from(policy, "utf-8"))
       .digest("hex");
   }