diff --git a/external/builder/fixtures_esprima/importalias-expected.js b/external/builder/fixtures_esprima/importalias-expected.js
new file mode 100644
index 000000000..e5087ea6b
--- /dev/null
+++ b/external/builder/fixtures_esprima/importalias-expected.js
@@ -0,0 +1,7 @@
+import { Test } from 'import-name';
+import { Test2 } from './non-alias';
+export {
+ Test3
+} from 'import-name';
+var Imp = require('import-name');
+var Imp2 = require('./non-alias');
diff --git a/external/builder/fixtures_esprima/importalias.js b/external/builder/fixtures_esprima/importalias.js
new file mode 100644
index 000000000..6c0d46520
--- /dev/null
+++ b/external/builder/fixtures_esprima/importalias.js
@@ -0,0 +1,5 @@
+import { Test } from 'import-alias';
+import { Test2 } from './non-alias';
+export { Test3 } from 'import-alias';
+var Imp = require('import-alias');
+var Imp2 = require('./non-alias');
diff --git a/external/builder/fixtures_esprima/umd-expected.js b/external/builder/fixtures_esprima/umd-expected.js
deleted file mode 100644
index 5d21a466d..000000000
--- a/external/builder/fixtures_esprima/umd-expected.js
+++ /dev/null
@@ -1,5 +0,0 @@
-'use strict';
-var aB = require('../a/b.js');
-var cD = require('./d.js');
-var opt;
-opt(aB + cD);
diff --git a/external/builder/fixtures_esprima/umd.js b/external/builder/fixtures_esprima/umd.js
deleted file mode 100644
index 605918a14..000000000
--- a/external/builder/fixtures_esprima/umd.js
+++ /dev/null
@@ -1,14 +0,0 @@
-'use strict';
-
-(function (root, factory) {
-  if (typeof define === 'function' && define.amd) {
-    define('test', ['exports', 'a/b', 'c/d'], factory);
-  } else if (typeof exports !== 'undefined') {
-    factory(exports, require('../a/b.js'), require('./d.js'));
-  } else {
-    factory((root.E = {}), root.aB, root.cD);
-  }
-}(this, function (exports, aB, cD, opt) {
-
-opt(aB + cD);
-}));
diff --git a/external/builder/preprocessor2.js b/external/builder/preprocessor2.js
index 2fc242b22..f3b43e462 100644
--- a/external/builder/preprocessor2.js
+++ b/external/builder/preprocessor2.js
@@ -80,6 +80,14 @@ function handlePreprocessorAction(ctx, actionName, args, loc) {
 
 function postprocessNode(ctx, node) {
   switch (node.type) {
+    case 'ExportNamedDeclaration':
+    case 'ImportDeclaration':
+      if (node.source && node.source.type === 'Literal' &&
+          ctx.map && ctx.map[node.source.value]) {
+        var newValue = ctx.map[node.source.value];
+        node.source.value = node.source.raw = newValue;
+      }
+      break;
     case 'IfStatement':
       if (isLiteral(node.test, true)) {
         // if (true) stmt1; => stmt1
@@ -165,6 +173,13 @@ function postprocessNode(ctx, node) {
         return handlePreprocessorAction(ctx, action,
                                         node.arguments, node.loc);
       }
+      // require('string')
+      if (node.callee.type === 'Identifier' && node.callee.name === 'require' &&
+          node.arguments.length === 1 && node.arguments[0].type === 'Literal' &&
+          ctx.map && ctx.map[node.arguments[0].value]) {
+        var requireName = node.arguments[0];
+        requireName.value = requireName.raw = ctx.map[requireName.value];
+      }
       break;
     case 'BlockStatement':
       var subExpressionIndex = 0;
@@ -201,86 +216,6 @@ function postprocessNode(ctx, node) {
         block.body.pop();
       }
       break;
-    case 'Program':
-      // Checking for a function closure that looks like UMD header.
-      node.body.some(function (item, index) {
-        // Is it `(function (root, factory) { ? }(this, function (?) {?}));` ?
-        if (item.type !== 'ExpressionStatement' ||
-            item.expression.type !== 'CallExpression' ||
-            item.expression.callee.type !== 'FunctionExpression' ||
-            item.expression.callee.params.length !== 2 ||
-            item.expression.arguments.length !== 2 ||
-            item.expression.arguments[0].type !== 'ThisExpression' ||
-            item.expression.arguments[1].type !== 'FunctionExpression') {
-          return false;
-        }
-        var init = item.expression.callee;
-        // Is init body looks like
-        // `if (?) { ? } else if (typeof exports !== 'undefined') { ? } ...`?
-        if (init.body.type !== 'BlockStatement' ||
-            init.body.body.length !== 1 ||
-            init.body.body[0].type !== 'IfStatement') {
-          return false;
-        }
-        var initIf = init.body.body[0];
-        if (initIf.alternate.type !== 'IfStatement' ||
-            initIf.alternate.test.type !== 'BinaryExpression' ||
-            initIf.alternate.test.operator !== '!==' ||
-            initIf.alternate.test.left.type !== 'UnaryExpression' ||
-            initIf.alternate.test.left.operator !== 'typeof' ||
-            initIf.alternate.test.left.argument.type !== 'Identifier' ||
-            initIf.alternate.test.left.argument.name !== 'exports' ||
-            initIf.alternate.test.right.type !== 'Literal' ||
-            initIf.alternate.test.right.value !== 'undefined' ||
-            initIf.alternate.consequent.type !== 'BlockStatement') {
-          return false;
-        }
-        var commonJsInit = initIf.alternate.consequent;
-        // Is commonJsInit `factory(exports, ...)` ?
-        if (commonJsInit.body.length !== 1 ||
-            commonJsInit.body[0].type !== 'ExpressionStatement' ||
-            commonJsInit.body[0].expression.type !== 'CallExpression' ||
-            commonJsInit.body[0].expression.callee.type !== 'Identifier') {
-          return false;
-        }
-        var commonJsInitArgs = commonJsInit.body[0].expression.arguments;
-        if (commonJsInitArgs.length === 0 ||
-            commonJsInitArgs[0].type !== 'Identifier' ||
-            commonJsInitArgs[0].name !== 'exports') {
-          return false;
-        }
-        var factory = item.expression.arguments[1];
-        // Is factory `function (exports, ....) { ? }` ?
-        if (factory.params.length === 0 ||
-            factory.params[0].type !== 'Identifier' ||
-            factory.params[0].name !== 'exports' ||
-            factory.body.type !== 'BlockStatement') {
-          return true;
-        }
-        var factoryParams = factory.params;
-        var factoryBody = factory.body;
-
-        // Remove closure and function and replacing parameters with vars.
-        node.body.splice(index, 1);
-        for (var i = 1, ii = factoryParams.length; i < ii; i++) {
-          var varNode = {
-            type: 'VariableDeclaration',
-            'declarations': [{
-                type: 'VariableDeclarator',
-                id: factoryParams[i],
-                init: commonJsInitArgs[i] || null,
-                loc: factoryParams[i].loc
-            }],
-            kind: 'var'
-          };
-          node.body.splice(index++, 0, varNode);
-        }
-        factoryBody.body.forEach(function (item) {
-          node.body.splice(index++, 0, item);
-        });
-        return true;
-      });
-      break;
   }
   return node;
 }
diff --git a/external/builder/test-fixtures_esprima.js b/external/builder/test-fixtures_esprima.js
index 944e91a04..063c19acf 100644
--- a/external/builder/test-fixtures_esprima.js
+++ b/external/builder/test-fixtures_esprima.js
@@ -24,8 +24,12 @@ files.forEach(function(expectationFilename) {
     OBJ: {obj: {i: 1}, j: 2},
     TEXT: 'text'
   };
+  var map = {
+    'import-alias': 'import-name',
+  };
   var ctx = {
     defines: defines,
+    map: map,
     rootPath: __dirname + '/../..',
   };
   var out;
diff --git a/gulpfile.js b/gulpfile.js
index 764cac4a6..2e2f579b5 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -142,6 +142,7 @@ function createWebpackConfig(defines, output) {
       alias: {
         'pdfjs': path.join(__dirname, 'src'),
         'pdfjs-web': path.join(__dirname, 'web'),
+        'pdfjs-lib': path.join(__dirname, 'web/pdfjs'),
       }
     },
     devtool: enableSourceMaps ? 'source-map' : undefined,
@@ -1008,7 +1009,10 @@ gulp.task('lib', ['buildnumber'], function () {
       LIB: true,
       BUNDLE_VERSION: versionInfo.version,
       BUNDLE_BUILD: versionInfo.commit
-    })
+    }),
+    map: {
+      'pdfjs-lib': '../pdf'
+    }
   };
   var licenseHeader = fs.readFileSync('./src/license_header.js').toString();
   var preprocessor2 = require('./external/builder/preprocessor2.js');
@@ -1021,6 +1025,7 @@ gulp.task('lib', ['buildnumber'], function () {
     ], {base: 'src/'}),
     gulp.src([
       'web/*.js',
+      '!web/pdfjs.js',
       '!web/viewer.js',
       '!web/compatibility.js',
     ], {base: '.'}),
diff --git a/src/main_loader.js b/src/main_loader.js
deleted file mode 100644
index e9512cd2e..000000000
--- a/src/main_loader.js
+++ /dev/null
@@ -1,72 +0,0 @@
-/* Copyright 2015 Mozilla Foundation
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-'use strict';
-
-(function (root, factory) {
-  if (typeof define === 'function' && define.amd) {
-    define('pdfjs/main_loader', ['exports', 'pdfjs/display/api',
-      'pdfjs/display/annotation_layer', 'pdfjs/display/text_layer',
-      'pdfjs/display/dom_utils', 'pdfjs/shared/util', 'pdfjs/display/svg',
-      'pdfjs/display/global'],
-      factory);
-  } else if (typeof exports !== 'undefined') {
-    factory(exports, require('./display/api.js'),
-      require('./display/annotation_layer.js'),
-      require('./display/text_layer.js'), require('./display/dom_utils.js'),
-      require('./shared/util.js'), require('./display/svg.js'),
-      require('./display/global.js'));
-  } else {
-    factory((root.pdfjsMainLoader = {}), root.pdfjsDisplayAPI,
-      root.pdfjsDisplayAnnotationLayer, root.pdfjsDisplayTextLayer,
-      root.pdfjsDisplayDOMUtils, root.pdfjsSharedUtil, root.pdfjsDisplaySVG,
-      root.pdfjsDisplayGlobal);
-  }
-}(this, function (exports, displayAPI, displayAnnotationLayer,
-                  displayTextLayer, displayDOMUtils, sharedUtil,
-                  displaySVG, displayGlobal) {
-
-  // Sync the exports below with ./pdf.js file/template.
-  exports.PDFJS = displayGlobal.PDFJS;
-  exports.build = displayAPI.build;
-  exports.version = displayAPI.version;
-  exports.getDocument = displayAPI.getDocument;
-  exports.PDFDataRangeTransport = displayAPI.PDFDataRangeTransport;
-  exports.LoopbackPort = displayAPI.LoopbackPort;
-  exports.PDFWorker = displayAPI.PDFWorker;
-  exports.renderTextLayer = displayTextLayer.renderTextLayer;
-  exports.AnnotationLayer = displayAnnotationLayer.AnnotationLayer;
-  exports.CustomStyle = displayDOMUtils.CustomStyle;
-  exports.createPromiseCapability = sharedUtil.createPromiseCapability;
-  exports.PasswordResponses = sharedUtil.PasswordResponses;
-  exports.InvalidPDFException = sharedUtil.InvalidPDFException;
-  exports.MissingPDFException = sharedUtil.MissingPDFException;
-  exports.SVGGraphics = displaySVG.SVGGraphics;
-  exports.NativeImageDecoding = sharedUtil.NativeImageDecoding;
-  exports.UnexpectedResponseException = sharedUtil.UnexpectedResponseException;
-  exports.OPS = sharedUtil.OPS;
-  exports.UNSUPPORTED_FEATURES = sharedUtil.UNSUPPORTED_FEATURES;
-  exports.isValidUrl = displayDOMUtils.isValidUrl;
-  exports.createValidAbsoluteUrl = sharedUtil.createValidAbsoluteUrl;
-  exports.createObjectURL = sharedUtil.createObjectURL;
-  exports.removeNullCharacters = sharedUtil.removeNullCharacters;
-  exports.shadow = sharedUtil.shadow;
-  exports.createBlob = sharedUtil.createBlob;
-  exports.RenderingCancelledException =
-    displayDOMUtils.RenderingCancelledException;
-  exports.getFilenameFromUrl = displayDOMUtils.getFilenameFromUrl;
-  exports.addLinkAttributes = displayDOMUtils.addLinkAttributes;
-  exports.StatTimer = sharedUtil.StatTimer;
-}));
diff --git a/src/pdf.js b/src/pdf.js
index f5ad9a2b2..0682da199 100644
--- a/src/pdf.js
+++ b/src/pdf.js
@@ -16,8 +16,10 @@
 
 'use strict';
 
-var pdfjsVersion = PDFJSDev.eval('BUNDLE_VERSION');
-var pdfjsBuild = PDFJSDev.eval('BUNDLE_BUILD');
+var pdfjsVersion =
+  typeof PDFJSDev !== 'undefined' ? PDFJSDev.eval('BUNDLE_VERSION') : void 0;
+var pdfjsBuild =
+  typeof PDFJSDev !== 'undefined' ? PDFJSDev.eval('BUNDLE_BUILD') : void 0;
 
 var pdfjsSharedUtil = require('./shared/util.js');
 var pdfjsDisplayGlobal = require('./display/global.js');
diff --git a/systemjs.config.js b/systemjs.config.js
index e4c2dde77..3f181018f 100644
--- a/systemjs.config.js
+++ b/systemjs.config.js
@@ -49,6 +49,7 @@
       'pdfjs': new URL('src', baseLocation).href,
       'pdfjs-web': new URL('web', baseLocation).href,
       'pdfjs-test': new URL('test', baseLocation).href,
+      'pdfjs-lib': new URL('src/pdf', baseLocation).href,
     },
     meta: {
       '*': {
diff --git a/web/annotation_layer_builder.js b/web/annotation_layer_builder.js
index 3b483b8ee..7086d283e 100644
--- a/web/annotation_layer_builder.js
+++ b/web/annotation_layer_builder.js
@@ -13,7 +13,7 @@
  * limitations under the License.
  */
 
-import { AnnotationLayer } from './pdfjs';
+import { AnnotationLayer } from 'pdfjs-lib';
 import { mozL10n } from './ui_utils';
 import { SimpleLinkService } from './pdf_link_service';
 
diff --git a/web/app.js b/web/app.js
index 0b99c7328..248d6e471 100644
--- a/web/app.js
+++ b/web/app.js
@@ -23,7 +23,7 @@ import {
   build, createBlob, getDocument, getFilenameFromUrl, InvalidPDFException,
   MissingPDFException, OPS, PDFJS, shadow, UnexpectedResponseException,
   UNSUPPORTED_FEATURES, version,
-} from './pdfjs';
+} from 'pdfjs-lib';
 import { CursorTool, PDFCursorTools } from './pdf_cursor_tools';
 import { PDFRenderingQueue, RenderingStates } from './pdf_rendering_queue';
 import { PDFSidebar, SidebarView } from './pdf_sidebar';
diff --git a/web/chromecom.js b/web/chromecom.js
index 224f4e9bf..73bcea68b 100644
--- a/web/chromecom.js
+++ b/web/chromecom.js
@@ -17,7 +17,7 @@
 import { DefaultExternalServices, PDFViewerApplication } from './app';
 import { BasePreferences } from './preferences';
 import { DownloadManager } from './download_manager';
-import { PDFJS } from './pdfjs';
+import { PDFJS } from 'pdfjs-lib';
 
 if (typeof PDFJSDev === 'undefined' || !PDFJSDev.test('CHROME')) {
   throw new Error('Module "pdfjs-web/chromecom" shall not be used outside ' +
diff --git a/web/download_manager.js b/web/download_manager.js
index fecb519c0..fa67e3e73 100644
--- a/web/download_manager.js
+++ b/web/download_manager.js
@@ -13,7 +13,7 @@
  * limitations under the License.
  */
 
-import { createObjectURL, createValidAbsoluteUrl, PDFJS } from './pdfjs';
+import { createObjectURL, createValidAbsoluteUrl, PDFJS } from 'pdfjs-lib';
 
 if (typeof PDFJSDev !== 'undefined' && !PDFJSDev.test('CHROME || GENERIC')) {
   throw new Error('Module "pdfjs-web/download_manager" shall not be used ' +
diff --git a/web/firefox_print_service.js b/web/firefox_print_service.js
index a5a6efcf8..e33492343 100644
--- a/web/firefox_print_service.js
+++ b/web/firefox_print_service.js
@@ -15,7 +15,7 @@
 
 import { CSS_UNITS } from './ui_utils';
 import { PDFPrintServiceFactory } from './app';
-import { shadow } from './pdfjs';
+import { shadow } from 'pdfjs-lib';
 
 // Creates a placeholder with div and canvas with right size for the page.
 function composePage(pdfDocument, pageNumber, size, printContainer) {
diff --git a/web/firefoxcom.js b/web/firefoxcom.js
index bdd5e4753..7b3412eb9 100644
--- a/web/firefoxcom.js
+++ b/web/firefoxcom.js
@@ -13,7 +13,7 @@
  * limitations under the License.
  */
 
-import { createObjectURL, PDFDataRangeTransport, shadow } from './pdfjs';
+import { createObjectURL, PDFDataRangeTransport, shadow } from 'pdfjs-lib';
 import { BasePreferences } from './preferences';
 import { PDFViewerApplication } from './app';
 
diff --git a/web/password_prompt.js b/web/password_prompt.js
index 895b081b3..2e41abdbf 100644
--- a/web/password_prompt.js
+++ b/web/password_prompt.js
@@ -14,7 +14,7 @@
  */
 
 import { mozL10n } from './ui_utils';
-import { PasswordResponses } from './pdfjs';
+import { PasswordResponses } from 'pdfjs-lib';
 
 /**
  * @typedef {Object} PasswordPromptOptions
diff --git a/web/pdf_attachment_viewer.js b/web/pdf_attachment_viewer.js
index 7c9f8b920..c5f0eaed3 100644
--- a/web/pdf_attachment_viewer.js
+++ b/web/pdf_attachment_viewer.js
@@ -16,7 +16,7 @@
 import {
   createObjectURL, createPromiseCapability, getFilenameFromUrl, PDFJS,
   removeNullCharacters
-} from './pdfjs';
+} from 'pdfjs-lib';
 
 /**
  * @typedef {Object} PDFAttachmentViewerOptions
diff --git a/web/pdf_document_properties.js b/web/pdf_document_properties.js
index f0e9edaed..970032bf9 100644
--- a/web/pdf_document_properties.js
+++ b/web/pdf_document_properties.js
@@ -14,7 +14,7 @@
  */
 
 import { cloneObj, getPDFFileNameFromURL, mozL10n } from './ui_utils';
-import { createPromiseCapability } from './pdfjs';
+import { createPromiseCapability } from 'pdfjs-lib';
 
 const DEFAULT_FIELD_CONTENT = '-';
 
diff --git a/web/pdf_find_controller.js b/web/pdf_find_controller.js
index 1304ee9ab..b1b39e1a9 100644
--- a/web/pdf_find_controller.js
+++ b/web/pdf_find_controller.js
@@ -13,7 +13,7 @@
  * limitations under the License.
  */
 
-import { createPromiseCapability } from './pdfjs';
+import { createPromiseCapability } from 'pdfjs-lib';
 import { scrollIntoView } from './ui_utils';
 
 var FindStates = {
diff --git a/web/pdf_outline_viewer.js b/web/pdf_outline_viewer.js
index 42fc90e51..1a22e80fd 100644
--- a/web/pdf_outline_viewer.js
+++ b/web/pdf_outline_viewer.js
@@ -15,7 +15,7 @@
 
 import {
   addLinkAttributes, PDFJS, removeNullCharacters
-} from './pdfjs';
+} from 'pdfjs-lib';
 
 const DEFAULT_TITLE = '\u2013';
 
diff --git a/web/pdf_page_view.js b/web/pdf_page_view.js
index 9a563ce7b..c08af41c1 100644
--- a/web/pdf_page_view.js
+++ b/web/pdf_page_view.js
@@ -20,7 +20,7 @@ import {
 import {
   createPromiseCapability, CustomStyle, PDFJS, RenderingCancelledException,
   SVGGraphics
-} from './pdfjs';
+} from 'pdfjs-lib';
 import { getGlobalEventBus } from './dom_events';
 import { RenderingStates } from './pdf_rendering_queue';
 
diff --git a/web/pdf_print_service.js b/web/pdf_print_service.js
index 6506b8632..9be414e00 100644
--- a/web/pdf_print_service.js
+++ b/web/pdf_print_service.js
@@ -15,7 +15,7 @@
 
 import { CSS_UNITS, mozL10n } from './ui_utils';
 import { PDFPrintServiceFactory, PDFViewerApplication } from './app';
-import { PDFJS } from './pdfjs';
+import { PDFJS } from 'pdfjs-lib';
 
 let activeService = null;
 let overlayManager = null;
diff --git a/web/pdf_thumbnail_view.js b/web/pdf_thumbnail_view.js
index 6d4aca892..91bdecf87 100644
--- a/web/pdf_thumbnail_view.js
+++ b/web/pdf_thumbnail_view.js
@@ -13,7 +13,9 @@
  * limitations under the License.
  */
 
-import { createPromiseCapability, RenderingCancelledException } from './pdfjs';
+import {
+  createPromiseCapability, RenderingCancelledException
+} from 'pdfjs-lib';
 import { getOutputScale, mozL10n } from './ui_utils';
 import { RenderingStates } from './pdf_rendering_queue';
 
diff --git a/web/pdf_viewer.js b/web/pdf_viewer.js
index f0b1cedb9..de0761c9f 100644
--- a/web/pdf_viewer.js
+++ b/web/pdf_viewer.js
@@ -13,7 +13,7 @@
  * limitations under the License.
  */
 
-import { createPromiseCapability, PDFJS } from './pdfjs';
+import { createPromiseCapability, PDFJS } from 'pdfjs-lib';
 import {
   CSS_UNITS, DEFAULT_SCALE, DEFAULT_SCALE_VALUE, getVisibleElements,
   MAX_AUTO_SCALE, RendererType, SCROLLBAR_PADDING, scrollIntoView,
diff --git a/web/pdfjs.js b/web/pdfjs.js
index 6cdf2d59a..62c4f8ba9 100644
--- a/web/pdfjs.js
+++ b/web/pdfjs.js
@@ -16,38 +16,15 @@
 
 'use strict';
 
-if (typeof PDFJSDev !== 'undefined' && PDFJSDev.test('PRODUCTION')) {
-  var pdfjsLib;
-  // The if below protected by __pdfjsdev_webpack__ check from webpack parsing.
-  if (typeof __pdfjsdev_webpack__ === 'undefined') {
-    if (typeof window !== 'undefined' && window['pdfjs-dist/build/pdf']) {
-      pdfjsLib = window['pdfjs-dist/build/pdf'];
-    } else if (typeof require === 'function') {
-      if (PDFJSDev.test('LIB')) {
-        pdfjsLib = require('../pdf.js');
-      } else {
-        pdfjsLib = require('../build/pdf.js');
-      }
-    } else {
-      throw new Error('Neither `require` nor `window` found');
-    }
+var pdfjsLib;
+// The if below protected by __pdfjsdev_webpack__ check from webpack parsing.
+if (typeof __pdfjsdev_webpack__ === 'undefined') {
+  if (typeof window !== 'undefined' && window['pdfjs-dist/build/pdf']) {
+    pdfjsLib = window['pdfjs-dist/build/pdf'];
+  } else if (typeof require === 'function') {
+    pdfjsLib = require('../build/pdf.js');
+  } else {
+    throw new Error('Neither `require` nor `window` found');
   }
-  module.exports = pdfjsLib;
-} else {
-  (function (root, factory) {
-    if (typeof define === 'function' && define.amd) {
-      define('pdfjs-web/pdfjs', ['exports', 'pdfjs/main_loader'], factory);
-    } else if (typeof exports !== 'undefined') {
-      factory(exports, require('../src/main_loader.js'));
-    } else {
-      factory((root.pdfjsWebPDFJS = {}), root.pdfjsMainLoader);
-    }
-  }(this, function (exports, mainLoader) {
-    // Re-export all mainLoader members.
-    for (var i in mainLoader) {
-      if (Object.prototype.hasOwnProperty.call(mainLoader, i)) {
-        exports[i] = mainLoader[i];
-      }
-    }
-  }));
 }
+module.exports = pdfjsLib;
diff --git a/web/text_layer_builder.js b/web/text_layer_builder.js
index 5ea6c6618..9be722c2b 100644
--- a/web/text_layer_builder.js
+++ b/web/text_layer_builder.js
@@ -14,7 +14,7 @@
  */
 
 import { getGlobalEventBus } from './dom_events';
-import { renderTextLayer } from './pdfjs';
+import { renderTextLayer } from 'pdfjs-lib';
 
 var EXPAND_DIVS_TIMEOUT = 300; // ms
 
diff --git a/web/ui_utils.js b/web/ui_utils.js
index a6693372f..4c22f331d 100644
--- a/web/ui_utils.js
+++ b/web/ui_utils.js
@@ -13,7 +13,7 @@
  * limitations under the License.
  */
 
-import { PDFJS } from './pdfjs';
+import { PDFJS } from 'pdfjs-lib';
 
 var CSS_UNITS = 96.0 / 72.0;
 var DEFAULT_SCALE_VALUE = 'auto';