diff --git a/README.md b/README.md
index f021e24a2..2419f752a 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# lodash-es v4.17.0
+# lodash-es v4.17.1
 
 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/4.17.0-es) for more details.
+See the [package source](https://github.com/lodash/lodash/tree/4.17.1-es) for more details.
diff --git a/_baseGet.js b/_baseGet.js
index 18bdab3a2..16a2912ac 100644
--- a/_baseGet.js
+++ b/_baseGet.js
@@ -1,5 +1,4 @@
 import castPath from './_castPath.js';
-import isKey from './_isKey.js';
 import toKey from './_toKey.js';
 
 /**
@@ -11,7 +10,7 @@ import toKey from './_toKey.js';
  * @returns {*} Returns the resolved value.
  */
 function baseGet(object, path) {
-  path = isKey(path, object) ? [path] : castPath(path);
+  path = castPath(path, object);
 
   var index = 0,
       length = path.length;
diff --git a/_baseInvoke.js b/_baseInvoke.js
index 1c2e03de9..e465d8460 100644
--- a/_baseInvoke.js
+++ b/_baseInvoke.js
@@ -1,6 +1,5 @@
 import apply from './_apply.js';
 import castPath from './_castPath.js';
-import isKey from './_isKey.js';
 import last from './last.js';
 import parent from './_parent.js';
 import toKey from './_toKey.js';
@@ -16,12 +15,9 @@ import toKey from './_toKey.js';
  * @returns {*} Returns the result of the invoked method.
  */
 function baseInvoke(object, path, args) {
-  if (!isKey(path, object)) {
-    path = castPath(path);
-    object = parent(object, path);
-    path = last(path);
-  }
-  var func = object == null ? object : object[toKey(path)];
+  path = castPath(path, object);
+  object = parent(object, path);
+  var func = object == null ? object : object[toKey(last(path))];
   return func == null ? undefined : apply(func, object, args);
 }
 
diff --git a/_basePullAt.js b/_basePullAt.js
index 8820c36e9..175e92070 100644
--- a/_basePullAt.js
+++ b/_basePullAt.js
@@ -1,6 +1,5 @@
 import castPath from './_castPath.js';
 import isIndex from './_isIndex.js';
-import isKey from './_isKey.js';
 import last from './last.js';
 import parent from './_parent.js';
 import toKey from './_toKey.js';
@@ -31,17 +30,14 @@ function basePullAt(array, indexes) {
       if (isIndex(index)) {
         splice.call(array, index, 1);
       }
-      else if (!isKey(index, array)) {
-        var path = castPath(index),
+      else {
+        var path = castPath(index, array),
             object = parent(array, path);
 
         if (object != null) {
           delete object[toKey(last(path))];
         }
       }
-      else {
-        delete array[toKey(index)];
-      }
     }
   }
   return array;
diff --git a/_baseSet.js b/_baseSet.js
index 187b3e5c2..6cdc792c6 100644
--- a/_baseSet.js
+++ b/_baseSet.js
@@ -1,7 +1,6 @@
 import assignValue from './_assignValue.js';
 import castPath from './_castPath.js';
 import isIndex from './_isIndex.js';
-import isKey from './_isKey.js';
 import isObject from './isObject.js';
 import toKey from './_toKey.js';
 
@@ -19,7 +18,7 @@ function baseSet(object, path, value, customizer) {
   if (!isObject(object)) {
     return object;
   }
-  path = isKey(path, object) ? [path] : castPath(path);
+  path = castPath(path, object);
 
   var index = -1,
       length = path.length,
diff --git a/_baseUnset.js b/_baseUnset.js
index b681142b8..404b3c764 100644
--- a/_baseUnset.js
+++ b/_baseUnset.js
@@ -1,5 +1,4 @@
 import castPath from './_castPath.js';
-import isKey from './_isKey.js';
 import last from './last.js';
 import parent from './_parent.js';
 import toKey from './_toKey.js';
@@ -19,9 +18,8 @@ var hasOwnProperty = objectProto.hasOwnProperty;
  * @returns {boolean} Returns `true` if the property is deleted, else `false`.
  */
 function baseUnset(object, path) {
-  path = isKey(path, object) ? [path] : castPath(path);
+  path = castPath(path, object);
   object = parent(object, path);
-
   var key = toKey(last(path));
   return !(object != null && hasOwnProperty.call(object, key)) || delete object[key];
 }
diff --git a/_castPath.js b/_castPath.js
index 55e78cfbc..89aae9551 100644
--- a/_castPath.js
+++ b/_castPath.js
@@ -1,15 +1,21 @@
 import isArray from './isArray.js';
+import isKey from './_isKey.js';
 import stringToPath from './_stringToPath.js';
+import toString from './toString.js';
 
 /**
  * Casts `value` to a path array if it's not one.
  *
  * @private
  * @param {*} value The value to inspect.
+ * @param {Object} [object] The object to query keys on.
  * @returns {Array} Returns the cast property path array.
  */
-function castPath(value) {
-  return isArray(value) ? value : stringToPath(value);
+function castPath(value, object) {
+  if (isArray(value)) {
+    return value;
+  }
+  return isKey(value, object) ? [value] : stringToPath(toString(value));
 }
 
 export default castPath;
diff --git a/_hasPath.js b/_hasPath.js
index a0698dc52..7decc6c06 100644
--- a/_hasPath.js
+++ b/_hasPath.js
@@ -2,7 +2,6 @@ import castPath from './_castPath.js';
 import isArguments from './isArguments.js';
 import isArray from './isArray.js';
 import isIndex from './_isIndex.js';
-import isKey from './_isKey.js';
 import isLength from './isLength.js';
 import toKey from './_toKey.js';
 
@@ -16,7 +15,7 @@ import toKey from './_toKey.js';
  * @returns {boolean} Returns `true` if `path` exists, else `false`.
  */
 function hasPath(object, path, hasFunc) {
-  path = isKey(path, object) ? [path] : castPath(path);
+  path = castPath(path, object);
 
   var index = -1,
       length = path.length,
diff --git a/_parent.js b/_parent.js
index aab10e6cc..ef6f8b457 100644
--- a/_parent.js
+++ b/_parent.js
@@ -10,7 +10,7 @@ import baseSlice from './_baseSlice.js';
  * @returns {*} Returns the parent value.
  */
 function parent(object, path) {
-  return path.length == 1 ? object : baseGet(object, baseSlice(path, 0, -1));
+  return path.length < 2 ? object : baseGet(object, baseSlice(path, 0, -1));
 }
 
 export default parent;
diff --git a/_stringToPath.js b/_stringToPath.js
index 1a61952ec..f0617e7de 100644
--- a/_stringToPath.js
+++ b/_stringToPath.js
@@ -1,5 +1,4 @@
 import memoizeCapped from './_memoizeCapped.js';
-import toString from './toString.js';
 
 /** Used to match property names within property paths. */
 var reLeadingDot = /^\./,
@@ -16,8 +15,6 @@ var reEscapeChar = /\\(\\)?/g;
  * @returns {Array} Returns the property path array.
  */
 var stringToPath = memoizeCapped(function(string) {
-  string = toString(string);
-
   var result = [];
   if (reLeadingDot.test(string)) {
     result.push('');
diff --git a/invokeMap.js b/invokeMap.js
index 4e23387b2..bab338328 100644
--- a/invokeMap.js
+++ b/invokeMap.js
@@ -3,7 +3,6 @@ import baseEach from './_baseEach.js';
 import baseInvoke from './_baseInvoke.js';
 import baseRest from './_baseRest.js';
 import isArrayLike from './isArrayLike.js';
-import isKey from './_isKey.js';
 
 /**
  * Invokes the method at `path` of each element in `collection`, returning
@@ -31,12 +30,10 @@ import isKey from './_isKey.js';
 var invokeMap = baseRest(function(collection, path, args) {
   var index = -1,
       isFunc = typeof path == 'function',
-      isProp = isKey(path),
       result = isArrayLike(collection) ? Array(collection.length) : [];
 
   baseEach(collection, function(value) {
-    var func = isFunc ? path : ((isProp && value != null) ? value[path] : undefined);
-    result[++index] = func ? apply(func, value, args) : baseInvoke(value, path, args);
+    result[++index] = isFunc ? apply(path, value, args) : baseInvoke(value, path, args);
   });
   return result;
 });
diff --git a/lodash.default.js b/lodash.default.js
index 1862730d4..f59f6b1f7 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 = '4.17.0';
+var VERSION = '4.17.1';
 
 /** Used to compose bitmasks for function metadata. */
 var WRAP_BIND_KEY_FLAG = 2;
diff --git a/omit.js b/omit.js
index da8eb9f93..4f01ca99b 100644
--- a/omit.js
+++ b/omit.js
@@ -1,5 +1,7 @@
+import arrayMap from './_arrayMap.js';
 import baseClone from './_baseClone.js';
 import baseUnset from './_baseUnset.js';
+import castPath from './_castPath.js';
 import copyObject from './_copyObject.js';
 import flatRest from './_flatRest.js';
 import getAllKeysIn from './_getAllKeysIn.js';
@@ -34,8 +36,15 @@ var omit = flatRest(function(object, paths) {
   if (object == null) {
     return result;
   }
+  var bitmask = CLONE_FLAT_FLAG | CLONE_SYMBOLS_FLAG;
+  paths = arrayMap(paths, function(path) {
+    path = castPath(path, object);
+    bitmask |= (path.length > 1 ? CLONE_DEEP_FLAG : 0);
+    return path;
+  });
+
   copyObject(object, getAllKeysIn(object), result);
-  result = baseClone(result, CLONE_DEEP_FLAG | CLONE_FLAT_FLAG | CLONE_SYMBOLS_FLAG);
+  result = baseClone(result, bitmask);
 
   var length = paths.length;
   while (length--) {
diff --git a/package.json b/package.json
index 9f7a677d3..5411a0c4a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash-es",
-  "version": "4.17.0",
+  "version": "4.17.1",
   "description": "Lodash exported as ES modules.",
   "keywords": "es6, modules, stdlib, util",
   "homepage": "https://lodash.com/custom-builds",
diff --git a/pick.js b/pick.js
index e55570f27..fb849922b 100644
--- a/pick.js
+++ b/pick.js
@@ -1,7 +1,5 @@
-import arrayMap from './_arrayMap.js';
 import basePick from './_basePick.js';
 import flatRest from './_flatRest.js';
-import toKey from './_toKey.js';
 
 /**
  * Creates an object composed of the picked `object` properties.
@@ -21,7 +19,7 @@ import toKey from './_toKey.js';
  * // => { 'a': 1, 'c': 3 }
  */
 var pick = flatRest(function(object, paths) {
-  return object == null ? {} : basePick(object, arrayMap(paths, toKey));
+  return object == null ? {} : basePick(object, paths);
 });
 
 export default pick;
diff --git a/pickBy.js b/pickBy.js
index a92abc955..4ff3598f5 100644
--- a/pickBy.js
+++ b/pickBy.js
@@ -1,3 +1,4 @@
+import arrayMap from './_arrayMap.js';
 import baseIteratee from './_baseIteratee.js';
 import basePickBy from './_basePickBy.js';
 import getAllKeysIn from './_getAllKeysIn.js';
@@ -21,7 +22,16 @@ import getAllKeysIn from './_getAllKeysIn.js';
  * // => { 'a': 1, 'c': 3 }
  */
 function pickBy(object, predicate) {
-  return object == null ? {} : basePickBy(object, getAllKeysIn(object), baseIteratee(predicate));
+  if (object == null) {
+    return {};
+  }
+  var props = arrayMap(getAllKeysIn(object), function(prop) {
+    return [prop];
+  });
+  predicate = baseIteratee(predicate);
+  return basePickBy(object, props, function(value, path) {
+    return predicate(value, path[0]);
+  });
 }
 
 export default pickBy;
diff --git a/result.js b/result.js
index eb44eea67..9b384e390 100644
--- a/result.js
+++ b/result.js
@@ -1,6 +1,5 @@
 import castPath from './_castPath.js';
 import isFunction from './isFunction.js';
-import isKey from './_isKey.js';
 import toKey from './_toKey.js';
 
 /**
@@ -33,7 +32,7 @@ import toKey from './_toKey.js';
  * // => 'default'
  */
 function result(object, path, defaultValue) {
-  path = isKey(path, object) ? [path] : castPath(path);
+  path = castPath(path, object);
 
   var index = -1,
       length = path.length;
diff --git a/toPath.js b/toPath.js
index 55ab01c52..e9f4d16c1 100644
--- a/toPath.js
+++ b/toPath.js
@@ -4,6 +4,7 @@ import isArray from './isArray.js';
 import isSymbol from './isSymbol.js';
 import stringToPath from './_stringToPath.js';
 import toKey from './_toKey.js';
+import toString from './toString.js';
 
 /**
  * Converts `value` to a property path array.
@@ -26,7 +27,7 @@ function toPath(value) {
   if (isArray(value)) {
     return arrayMap(value, toKey);
   }
-  return isSymbol(value) ? [value] : copyArray(stringToPath(value));
+  return isSymbol(value) ? [value] : copyArray(stringToPath(toString(value)));
 }
 
 export default toPath;