diff --git a/package-lock.json b/package-lock.json
index 5915ccf6c..544441e0f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11581,11 +11581,6 @@
       "resolved": "https://registry.npmjs.org/prop-assign/-/prop-assign-1.0.0.tgz",
       "integrity": "sha1-l2eh+/1wk5CGR6boRtMbT+qnBFk="
     },
-    "propprop": {
-      "version": "0.3.1",
-      "resolved": "https://registry.npmjs.org/propprop/-/propprop-0.3.1.tgz",
-      "integrity": "sha1-oEmjVouJZEAGfRXY7J8zc15XAXg="
-    },
     "protobufjs": {
       "version": "6.8.8",
       "resolved": "https://registry.npmjs.org/protobufjs/-/protobufjs-6.8.8.tgz",
diff --git a/package.json b/package.json
index 4f0c38f49..e93c5c8f9 100644
--- a/package.json
+++ b/package.json
@@ -74,7 +74,6 @@
     "lodash.flatten": "^4.4.0",
     "lodash.merge": "^4.6.1",
     "prop-assign": "^1.0.0",
-    "propprop": "^0.3.1",
     "safe-buffer": "^5.1.2",
     "split-array-stream": "^2.0.0",
     "stream-events": "^1.0.4",
diff --git a/src/transaction.js b/src/transaction.js
index 61fb1e369..6d85c56d1 100644
--- a/src/transaction.js
+++ b/src/transaction.js
@@ -20,7 +20,6 @@ var arrify = require('arrify');
 var common = require('@google-cloud/common');
 var flatten = require('lodash.flatten');
 var is = require('is');
-var prop = require('propprop');
 var util = require('util');
 
 var entity = require('./entity.js');
@@ -200,7 +199,7 @@ Transaction.prototype.commit = function(gaxOptions, callback) {
   // Take the `req` array built previously, and merge them into one request to
   // send as the final transactional commit.
   var reqOpts = {
-    mutations: flatten(this.requests_.map(prop('mutations'))),
+    mutations: flatten(this.requests_.map(x => x.mutations)),
   };
 
   this.request_(