diff --git a/README.md b/README.md
index fad914c1a..d06860546 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# lodash-es v4.16.3
+# lodash-es v4.16.4
 
 The [Lodash](https://lodash.com/) library exported as [ES](http://www.ecma-international.org/ecma-262/6.0/) modules.
 
@@ -7,4 +7,4 @@ Generated using [lodash-cli](https://www.npmjs.com/package/lodash-cli):
 $ lodash modularize exports=es -o ./
 ```
 
-See the [package source](https://github.com/lodash/lodash/tree/4.16.3-es) for more details.
+See the [package source](https://github.com/lodash/lodash/tree/4.16.4-es) for more details.
diff --git a/_arrayLikeKeys.js b/_arrayLikeKeys.js
index 387113d19..de5d55155 100644
--- a/_arrayLikeKeys.js
+++ b/_arrayLikeKeys.js
@@ -1,7 +1,9 @@
 import baseTimes from './_baseTimes.js';
 import isArguments from './isArguments.js';
 import isArray from './isArray.js';
+import isBuffer from './isBuffer.js';
 import isIndex from './_isIndex.js';
+import isTypedArray from './isTypedArray.js';
 
 /** Used for built-in method references. */
 var objectProto = Object.prototype;
@@ -18,18 +20,26 @@ var hasOwnProperty = objectProto.hasOwnProperty;
  * @returns {Array} Returns the array of property names.
  */
 function arrayLikeKeys(value, inherited) {
-  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
-  // Safari 9 makes `arguments.length` enumerable in strict mode.
-  var result = (isArray(value) || isArguments(value))
-    ? baseTimes(value.length, String)
-    : [];
-
-  var length = result.length,
-      skipIndexes = !!length;
+  var isArr = isArray(value),
+      isArg = !isArr && isArguments(value),
+      isBuff = !isArr && !isArg && isBuffer(value),
+      isType = !isArr && !isArg && !isBuff && isTypedArray(value),
+      skipIndexes = isArr || isArg || isBuff || isType,
+      result = skipIndexes ? baseTimes(value.length, String) : [],
+      length = result.length;
 
   for (var key in value) {
     if ((inherited || hasOwnProperty.call(value, key)) &&
-        !(skipIndexes && (key == 'length' || isIndex(key, length)))) {
+        !(skipIndexes && (
+           // Safari 9 has enumerable `arguments.length` in strict mode.
+           key == 'length' ||
+           // Node.js 0.10 has enumerable non-index properties on buffers.
+           (isBuff && (key == 'offset' || key == 'parent')) ||
+           // PhantomJS 2 has enumerable non-index properties on typed arrays.
+           (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||
+           // Skip index properties.
+           isIndex(key, length)
+        ))) {
       result.push(key);
     }
   }
diff --git a/_arraySampleSize.js b/_arraySampleSize.js
index c361700f5..d5c9474b5 100644
--- a/_arraySampleSize.js
+++ b/_arraySampleSize.js
@@ -1,3 +1,4 @@
+import baseClamp from './_baseClamp.js';
 import copyArray from './_copyArray.js';
 import shuffleSelf from './_shuffleSelf.js';
 
@@ -10,7 +11,7 @@ import shuffleSelf from './_shuffleSelf.js';
  * @returns {Array} Returns the random elements.
  */
 function arraySampleSize(array, n) {
-  return shuffleSelf(copyArray(array), n);
+  return shuffleSelf(copyArray(array), baseClamp(n, 0, array.length));
 }
 
 export default arraySampleSize;
diff --git a/_baseClone.js b/_baseClone.js
index b2e134688..4fa9a4b72 100644
--- a/_baseClone.js
+++ b/_baseClone.js
@@ -118,9 +118,7 @@ function baseClone(value, isDeep, isFull, customizer, key, object, stack) {
   }
   stack.set(value, result);
 
-  if (!isArr) {
-    var props = isFull ? getAllKeys(value) : keys(value);
-  }
+  var props = isArr ? undefined : (isFull ? getAllKeys : keys)(value);
   arrayEach(props || value, function(subValue, key) {
     if (props) {
       key = subValue;
diff --git a/_baseIsArguments.js b/_baseIsArguments.js
new file mode 100644
index 000000000..f4ff1fc6f
--- /dev/null
+++ b/_baseIsArguments.js
@@ -0,0 +1,27 @@
+import isObjectLike from './isObjectLike.js';
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]';
+
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/**
+ * The base implementation of `_.isArguments`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ */
+function baseIsArguments(value) {
+  return isObjectLike(value) && objectToString.call(value) == argsTag;
+}
+
+export default baseIsArguments;
diff --git a/_baseMerge.js b/_baseMerge.js
index e306a6274..37680f72f 100644
--- a/_baseMerge.js
+++ b/_baseMerge.js
@@ -1,11 +1,9 @@
 import Stack from './_Stack.js';
-import arrayEach from './_arrayEach.js';
 import assignMergeValue from './_assignMergeValue.js';
-import baseKeysIn from './_baseKeysIn.js';
+import baseFor from './_baseFor.js';
 import baseMergeDeep from './_baseMergeDeep.js';
-import isArray from './isArray.js';
 import isObject from './isObject.js';
-import isTypedArray from './isTypedArray.js';
+import keysIn from './keysIn.js';
 
 /**
  * The base implementation of `_.merge` without support for multiple sources.
@@ -22,14 +20,7 @@ function baseMerge(object, source, srcIndex, customizer, stack) {
   if (object === source) {
     return;
   }
-  if (!(isArray(source) || isTypedArray(source))) {
-    var props = baseKeysIn(source);
-  }
-  arrayEach(props || source, function(srcValue, key) {
-    if (props) {
-      key = srcValue;
-      srcValue = source[key];
-    }
+  baseFor(source, function(srcValue, key) {
     if (isObject(srcValue)) {
       stack || (stack = new Stack);
       baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
@@ -44,7 +35,7 @@ function baseMerge(object, source, srcIndex, customizer, stack) {
       }
       assignMergeValue(object, key, newValue);
     }
-  });
+  }, keysIn);
 }
 
 export default baseMerge;
diff --git a/_baseMergeDeep.js b/_baseMergeDeep.js
index 860ea19b9..a7962fbc7 100644
--- a/_baseMergeDeep.js
+++ b/_baseMergeDeep.js
@@ -1,10 +1,12 @@
 import assignMergeValue from './_assignMergeValue.js';
+import cloneBuffer from './_cloneBuffer.js';
 import cloneTypedArray from './_cloneTypedArray.js';
 import copyArray from './_copyArray.js';
 import initCloneObject from './_initCloneObject.js';
 import isArguments from './isArguments.js';
 import isArray from './isArray.js';
 import isArrayLikeObject from './isArrayLikeObject.js';
+import isBuffer from './isBuffer.js';
 import isFunction from './isFunction.js';
 import isObject from './isObject.js';
 import isPlainObject from './isPlainObject.js';
@@ -43,16 +45,21 @@ function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, sta
 
   if (isCommon) {
     var isArr = isArray(srcValue),
-        isTyped = !isArr && isTypedArray(srcValue);
+        isBuff = !isArr && isBuffer(srcValue),
+        isTyped = !isArr && !isBuff && isTypedArray(srcValue);
 
     newValue = srcValue;
-    if (isArr || isTyped) {
+    if (isArr || isBuff || isTyped) {
       if (isArray(objValue)) {
         newValue = objValue;
       }
       else if (isArrayLikeObject(objValue)) {
         newValue = copyArray(objValue);
       }
+      else if (isBuff) {
+        isCommon = false;
+        newValue = cloneBuffer(srcValue, true);
+      }
       else if (isTyped) {
         isCommon = false;
         newValue = cloneTypedArray(srcValue, true);
diff --git a/_baseSampleSize.js b/_baseSampleSize.js
index 7e2f32b12..04877a16b 100644
--- a/_baseSampleSize.js
+++ b/_baseSampleSize.js
@@ -1,3 +1,4 @@
+import baseClamp from './_baseClamp.js';
 import shuffleSelf from './_shuffleSelf.js';
 import values from './values.js';
 
@@ -10,7 +11,8 @@ import values from './values.js';
  * @returns {Array} Returns the random elements.
  */
 function baseSampleSize(collection, n) {
-  return shuffleSelf(values(collection), n);
+  var array = values(collection);
+  return shuffleSelf(array, baseClamp(n, 0, array.length));
 }
 
 export default baseSampleSize;
diff --git a/_baseToString.js b/_baseToString.js
index 3b264fc60..7b5b35c58 100644
--- a/_baseToString.js
+++ b/_baseToString.js
@@ -1,4 +1,6 @@
 import Symbol from './_Symbol.js';
+import arrayMap from './_arrayMap.js';
+import isArray from './isArray.js';
 import isSymbol from './isSymbol.js';
 
 /** Used as references for various `Number` constants. */
@@ -21,6 +23,10 @@ function baseToString(value) {
   if (typeof value == 'string') {
     return value;
   }
+  if (isArray(value)) {
+    // Recursively convert values (susceptible to call stack limits).
+    return arrayMap(value, baseToString) + '';
+  }
   if (isSymbol(value)) {
     return symbolToString ? symbolToString.call(value) : '';
   }
diff --git a/_shuffleSelf.js b/_shuffleSelf.js
index 178c8b977..a04ebea15 100644
--- a/_shuffleSelf.js
+++ b/_shuffleSelf.js
@@ -1,4 +1,3 @@
-import baseClamp from './_baseClamp.js';
 import baseRandom from './_baseRandom.js';
 
 /**
@@ -14,7 +13,7 @@ function shuffleSelf(array, size) {
       length = array.length,
       lastIndex = length - 1;
 
-  size = size === undefined ? length : baseClamp(size, 0, length);
+  size = size === undefined ? length : size;
   while (++index < size) {
     var rand = baseRandom(index, lastIndex),
         value = array[rand];
diff --git a/isArguments.js b/isArguments.js
index c5650a56a..6c49fe578 100644
--- a/isArguments.js
+++ b/isArguments.js
@@ -1,7 +1,5 @@
-import isArrayLikeObject from './isArrayLikeObject.js';
-
-/** `Object#toString` result references. */
-var argsTag = '[object Arguments]';
+import baseIsArguments from './_baseIsArguments.js';
+import isObjectLike from './isObjectLike.js';
 
 /** Used for built-in method references. */
 var objectProto = Object.prototype;
@@ -9,13 +7,6 @@ var objectProto = Object.prototype;
 /** Used to check objects for own properties. */
 var hasOwnProperty = objectProto.hasOwnProperty;
 
-/**
- * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
- * of values.
- */
-var objectToString = objectProto.toString;
-
 /** Built-in value references. */
 var propertyIsEnumerable = objectProto.propertyIsEnumerable;
 
@@ -37,10 +28,9 @@ var propertyIsEnumerable = objectProto.propertyIsEnumerable;
  * _.isArguments([1, 2, 3]);
  * // => false
  */
-function isArguments(value) {
-  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
-  return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
-    (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
-}
+var isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {
+  return isObjectLike(value) && hasOwnProperty.call(value, 'callee') &&
+    !propertyIsEnumerable.call(value, 'callee');
+};
 
 export default isArguments;
diff --git a/isEmpty.js b/isEmpty.js
index 48176a256..9fbccd579 100644
--- a/isEmpty.js
+++ b/isEmpty.js
@@ -1,10 +1,11 @@
+import baseKeys from './_baseKeys.js';
 import getTag from './_getTag.js';
 import isArguments from './isArguments.js';
 import isArray from './isArray.js';
 import isArrayLike from './isArrayLike.js';
 import isBuffer from './isBuffer.js';
 import isPrototype from './_isPrototype.js';
-import nativeKeys from './_nativeKeys.js';
+import isTypedArray from './isTypedArray.js';
 
 /** `Object#toString` result references. */
 var mapTag = '[object Map]',
@@ -51,8 +52,8 @@ var hasOwnProperty = objectProto.hasOwnProperty;
  */
 function isEmpty(value) {
   if (isArrayLike(value) &&
-      (isArray(value) || typeof value == 'string' ||
-        typeof value.splice == 'function' || isBuffer(value) || isArguments(value))) {
+      (isArray(value) || typeof value == 'string' || typeof value.splice == 'function' ||
+        isBuffer(value) || isTypedArray(value) || isArguments(value))) {
     return !value.length;
   }
   var tag = getTag(value);
@@ -60,7 +61,7 @@ function isEmpty(value) {
     return !value.size;
   }
   if (isPrototype(value)) {
-    return !nativeKeys(value).length;
+    return !baseKeys(value).length;
   }
   for (var key in value) {
     if (hasOwnProperty.call(value, key)) {
diff --git a/isFunction.js b/isFunction.js
index 4f45e4d3d..f1a819b35 100644
--- a/isFunction.js
+++ b/isFunction.js
@@ -34,7 +34,7 @@ var objectToString = objectProto.toString;
  */
 function isFunction(value) {
   // The use of `Object#toString` avoids issues with the `typeof` operator
-  // in Safari 8-9 which returns 'object' for typed array and other constructors.
+  // in Safari 9 which returns 'object' for typed array and other constructors.
   var tag = isObject(value) ? objectToString.call(value) : '';
   return tag == funcTag || tag == genTag || tag == proxyTag;
 }
diff --git a/lodash.default.js b/lodash.default.js
index 24de68ae3..995eca22f 100644
--- a/lodash.default.js
+++ b/lodash.default.js
@@ -45,7 +45,7 @@ import toInteger from './toInteger.js';
 import lodash from './wrapperLodash.js';
 
 /** Used as the semantic version number. */
-var VERSION = '4.16.3';
+var VERSION = '4.16.4';
 
 /** Used to compose bitmasks for function metadata. */
 var BIND_KEY_FLAG = 2;
diff --git a/package.json b/package.json
index 772f3179c..6a5e709f9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash-es",
-  "version": "4.16.3",
+  "version": "4.16.4",
   "description": "Lodash exported as ES modules.",
   "keywords": "es6, modules, stdlib, util",
   "homepage": "https://lodash.com/custom-builds",
diff --git a/toString.js b/toString.js
index 3f0bc49d9..ecf9e5020 100644
--- a/toString.js
+++ b/toString.js
@@ -8,8 +8,8 @@ import baseToString from './_baseToString.js';
  * @memberOf _
  * @since 4.0.0
  * @category Lang
- * @param {*} value The value to process.
- * @returns {string} Returns the string.
+ * @param {*} value The value to convert.
+ * @returns {string} Returns the converted string.
  * @example
  *
  * _.toString(null);
diff --git a/transform.js b/transform.js
index 2ea561aad..d6f9456ca 100644
--- a/transform.js
+++ b/transform.js
@@ -4,6 +4,7 @@ import baseForOwn from './_baseForOwn.js';
 import baseIteratee from './_baseIteratee.js';
 import getPrototype from './_getPrototype.js';
 import isArray from './isArray.js';
+import isBuffer from './isBuffer.js';
 import isFunction from './isFunction.js';
 import isObject from './isObject.js';
 import isTypedArray from './isTypedArray.js';
@@ -39,22 +40,23 @@ import isTypedArray from './isTypedArray.js';
  * // => { '1': ['a', 'c'], '2': ['b'] }
  */
 function transform(object, iteratee, accumulator) {
-  var isArr = isArray(object) || isTypedArray(object);
-  iteratee = baseIteratee(iteratee, 4);
+  var isArr = isArray(object),
+      isArrLike = isArr || isBuffer(object) || isTypedArray(object);
 
+  iteratee = baseIteratee(iteratee, 4);
   if (accumulator == null) {
-    if (isArr || isObject(object)) {
-      var Ctor = object.constructor;
-      if (isArr) {
-        accumulator = isArray(object) ? new Ctor : [];
-      } else {
-        accumulator = isFunction(Ctor) ? baseCreate(getPrototype(object)) : {};
-      }
-    } else {
+    var Ctor = object && object.constructor;
+    if (isArrLike) {
+      accumulator = isArr ? new Ctor : [];
+    }
+    else if (isObject(object)) {
+      accumulator = isFunction(Ctor) ? baseCreate(getPrototype(object)) : {};
+    }
+    else {
       accumulator = {};
     }
   }
-  (isArr ? arrayEach : baseForOwn)(object, function(value, index, object) {
+  (isArrLike ? arrayEach : baseForOwn)(object, function(value, index, object) {
     return iteratee(accumulator, value, index, object);
   });
   return accumulator;