diff --git a/package.json b/package.json
index 56b32ceca2e43a..361f4d88c92c8d 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,8 @@
     "flatbuffers": "^1.9.0",
     "magic-string": "^0.22.5",
     "prettier": "^1.14.0",
-    "rollup": "^0.63.2",
+    "rollup": "A build of rollup that includes: https://github.com/rollup/rollup/pull/2531",
+    "rollup": "./third_party/rollup/rollup-0.66.6.patch.tgz",
     "rollup-plugin-alias": "^1.4.0",
     "rollup-plugin-analyzer": "^2.1.0",
     "rollup-plugin-commonjs": "^9.1.3",
diff --git a/rollup.config.js b/rollup.config.js
index a648c647048316..5a680aab336a06 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -1,5 +1,5 @@
 // Copyright 2018 the Deno authors. All rights reserved. MIT license.
-import assert from "assert";
+// @ts-check
 import * as fs from "fs";
 import path from "path";
 import alias from "rollup-plugin-alias";
@@ -30,10 +30,14 @@ const tsconfigOverride = {
   }
 };
 
-// this is a rollup plugin which will look for imports ending with `!string` and resolve
-// them with a module that will inline the contents of the file as a string.  Needed to
-// support `js/assets.ts`.
-function strings({ include, exclude } = {}) {
+/** this is a rollup plugin which will look for imports ending with `!string` and resolve
+ * them with a module that will inline the contents of the file as a string.  Needed to
+ * support `js/assets.ts`.
+ * @param {any} param0
+ */
+function strings(
+  { include, exclude } = { include: undefined, exclude: undefined }
+) {
   if (!include) {
     throw new Error("include option must be passed");
   }
@@ -85,7 +89,9 @@ const osNodeToDeno = {
   linux: "linux"
 };
 
-// Inject deno.platform.arch and deno.platform.os
+/** Inject deno.platform.arch and deno.platform.os
+ * @param {any} param0
+ */
 function platform({ include, exclude } = {}) {
   if (!include) {
     throw new Error("include option must be passed");
@@ -150,7 +156,7 @@ function generateDepFile({ outputFile, sourceFiles = [], configFiles = [] }) {
       sourceFiles.push(sourceFile);
       // Remember the time stamp that we last resolved a dependency.
       // We'll set the last modified time of the depfile to that.
-      timestamp = new Date();
+      timestamp = Date.now();
     }
   };
 }
@@ -209,7 +215,8 @@ export default function makeConfig(commandOptions) {
     output: {
       format: "iife",
       name: "denoMain",
-      sourcemap: true
+      sourcemap: true,
+      sourcemapExcludeSources: true
     },
 
     plugins: [
diff --git a/tests/error_004_missing_module.ts.out b/tests/error_004_missing_module.ts.out
index 64932ddd0138a7..22207250dc5808 100644
--- a/tests/error_004_missing_module.ts.out
+++ b/tests/error_004_missing_module.ts.out
@@ -7,5 +7,5 @@ NotFound: Cannot resolve module "bad-module.ts" from "[WILDCARD]/tests/error_004
     at moduleNames.map.name ([WILDCARD]/js/compiler.ts:[WILDCARD])
     at Array.map (<anonymous>)
     at DenoCompiler.resolveModuleNames ([WILDCARD]/js/compiler.ts:[WILDCARD])
-    at Object.compilerHost.resolveModuleNames ([WILDCARD]/third_party/node_modules/typescript/lib/typescript.js:[WILDCARD])
-    at resolveModuleNamesWorker ([WILDCARD]/third_party/node_modules/typescript/lib/typescript.js:[WILDCARD])
+    at Object.compilerHost.resolveModuleNames (<anonymous>)
+    at resolveModuleNamesWorker (<anonymous>)
diff --git a/tests/error_005_missing_dynamic_import.ts.out b/tests/error_005_missing_dynamic_import.ts.out
index eb991de9db31a3..a0f17cf8124779 100644
--- a/tests/error_005_missing_dynamic_import.ts.out
+++ b/tests/error_005_missing_dynamic_import.ts.out
@@ -7,5 +7,5 @@ NotFound: Cannot resolve module "bad-module.ts" from "[WILDCARD]/tests/error_005
     at moduleNames.map.name ([WILDCARD]/js/compiler.ts:[WILDCARD])
     at Array.map (<anonymous>)
     at DenoCompiler.resolveModuleNames ([WILDCARD]/js/compiler.ts:[WILDCARD])
-    at Object.compilerHost.resolveModuleNames ([WILDCARD]/third_party/node_modules/typescript/lib/typescript.js:[WILDCARD])
-    at resolveModuleNamesWorker ([WILDCARD]/third_party/node_modules/typescript/lib/typescript.js:[WILDCARD])
+    at Object.compilerHost.resolveModuleNames (<anonymous>)
+    at resolveModuleNamesWorker (<anonymous>)
diff --git a/tests/error_006_import_ext_failure.ts.out b/tests/error_006_import_ext_failure.ts.out
index f2b6aa599116ca..f5f76af0f51f50 100644
--- a/tests/error_006_import_ext_failure.ts.out
+++ b/tests/error_006_import_ext_failure.ts.out
@@ -7,5 +7,5 @@ NotFound: Cannot resolve module "./non-existent" from "[WILDCARD]/tests/error_00
     at moduleNames.map.name ([WILDCARD]/js/compiler.ts:[WILDCARD])
     at Array.map (<anonymous>)
     at DenoCompiler.resolveModuleNames ([WILDCARD]/js/compiler.ts:[WILDCARD])
-    at Object.compilerHost.resolveModuleNames ([WILDCARD]/third_party/node_modules/typescript/lib/typescript.js:[WILDCARD])
-    at resolveModuleNamesWorker ([WILDCARD]/third_party/node_modules/typescript/lib/typescript.js:[WILDCARD])
+    at Object.compilerHost.resolveModuleNames (<anonymous>)
+    at resolveModuleNamesWorker (<anonymous>)
diff --git a/third_party b/third_party
index b93f9c8bd39a25..c3dc20fdc4a56e 160000
--- a/third_party
+++ b/third_party
@@ -1 +1 @@
-Subproject commit b93f9c8bd39a2548d60167043da6b947c023a830
+Subproject commit c3dc20fdc4a56e6c41b7a3604c7fd3e3f551427f