diff --git a/packages/babel-plugin-transform-runtime/src/definitions.js b/packages/babel-plugin-transform-runtime/src/definitions.js
index de549ebb3a..38fe3fdb97 100644
--- a/packages/babel-plugin-transform-runtime/src/definitions.js
+++ b/packages/babel-plugin-transform-runtime/src/definitions.js
@@ -5,7 +5,9 @@ module.exports = {
     Map: "map",
     WeakMap: "weak-map",
     Set: "set",
-    WeakSet: "weak-set"
+    WeakSet: "weak-set",
+    setImmediate: "set-immediate",
+    clearImmediate: "clear-immediate"
   },
 
   methods: {
@@ -41,11 +43,13 @@ module.exports = {
       values: "array/values"
     },
 
+    JSON: {
+      stringify: "json/stringify"
+    },
+
     Object: {
       assign: "object/assign",
-      classof: "object/classof",
       create: "object/create",
-      define: "object/define",
       defineProperties: "object/define-properties",
       defineProperty: "object/define-property",
       entries: "object/entries",
@@ -54,15 +58,12 @@ module.exports = {
       getOwnPropertyDescriptors: "object/get-own-property-descriptors",
       getOwnPropertyNames: "object/get-own-property-names",
       getOwnPropertySymbols: "object/get-own-property-symbols",
-      getPrototypePf: "object/get-prototype-of",
-      index: "object/index",
+      getPrototypeOf: "object/get-prototype-of",
       isExtensible: "object/is-extensible",
       isFrozen: "object/is-frozen",
-      isObject: "object/is-object",
       isSealed: "object/is-sealed",
       is: "object/is",
       keys: "object/keys",
-      make: "object/make",
       preventExtensions: "object/prevent-extensions",
       seal: "object/seal",
       setPrototypeOf: "object/set-prototype-of",
@@ -73,11 +74,6 @@ module.exports = {
       escape: "regexp/escape"
     },
 
-    Function: {
-      only: "function/only",
-      part: "function/part"
-    },
-
     Math: {
       acosh: "math/acosh",
       asinh: "math/asinh",
@@ -88,7 +84,6 @@ module.exports = {
       expm1: "math/expm1",
       fround: "math/fround",
       hypot: "math/hypot",
-      pot: "math/pot",
       imul: "math/imul",
       log10: "math/log10",
       log1p: "math/log1p",
@@ -99,16 +94,10 @@ module.exports = {
       trunc: "math/trunc"
     },
 
-    Date: {
-      addLocale: "date/add-locale",
-      formatUTC: "date/format-utc",
-      format: "date/format"
-    },
-
     Symbol: {
       for: "symbol/for",
       hasInstance: "symbol/has-instance",
-      "is-concat-spreadable": "symbol/is-concat-spreadable",
+      isConcatSpreadable: "symbol/is-concat-spreadable",
       iterator: "symbol/iterator",
       keyFor: "symbol/key-for",
       match: "symbol/match",
@@ -125,13 +114,16 @@ module.exports = {
       at: "string/at",
       codePointAt: "string/code-point-at",
       endsWith: "string/ends-with",
-      escapeHTML: "string/escape-html",
       fromCodePoint: "string/from-code-point",
       includes: "string/includes",
+      padLeft: "string/pad-left",
+      padRight: "string/pad-right",
       raw: "string/raw",
       repeat: "string/repeat",
       startsWith: "string/starts-with",
-      unescapeHTML: "string/unescape-html"
+      trim: "string/trim",
+      trimLeft: "string/trim-left",
+      trimRight: "string/trim-right"
     },
 
     Number: {
@@ -143,8 +135,7 @@ module.exports = {
       MAX_SAFE_INTEGER: "number/max-safe-integer",
       MIN_SAFE_INTEGER: "number/min-safe-integer",
       parseFloat: "number/parse-float",
-      parseInt: "number/parse-int",
-      random: "number/random"
+      parseInt: "number/parse-int"
     },
 
     Reflect: {
diff --git a/packages/babel-runtime/package.json b/packages/babel-runtime/package.json
index 6f8bfb9aab..aac2fe9542 100644
--- a/packages/babel-runtime/package.json
+++ b/packages/babel-runtime/package.json
@@ -6,7 +6,7 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-runtime",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "dependencies": {
-    "core-js": "^1.0.0"
+    "core-js": "^1.2.0"
   },
   "devDependencies": {
     "babel-helpers": "^6.0.14",