diff --git a/bower.json b/bower.json
index f56c39b8c..048164af0 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "pdfjs-dist",
-  "version": "1.2.107",
+  "version": "1.2.109",
   "main": [
     "build/pdf.js",
     "build/pdf.worker.js"
diff --git a/build/pdf.combined.js b/build/pdf.combined.js
index fdaafbfdd..813324c09 100644
--- a/build/pdf.combined.js
+++ b/build/pdf.combined.js
@@ -22,8 +22,8 @@ if (typeof PDFJS === 'undefined') {
   (typeof window !== 'undefined' ? window : this).PDFJS = {};
 }
 
-PDFJS.version = '1.2.107';
-PDFJS.build = '9e335a6';
+PDFJS.version = '1.2.109';
+PDFJS.build = '875588d';
 
 (function pdfjsWrapper() {
   // Use strict in our context only - users might not want it
diff --git a/build/pdf.js b/build/pdf.js
index 93d371297..33c911a7e 100644
--- a/build/pdf.js
+++ b/build/pdf.js
@@ -22,8 +22,8 @@ if (typeof PDFJS === 'undefined') {
   (typeof window !== 'undefined' ? window : this).PDFJS = {};
 }
 
-PDFJS.version = '1.2.107';
-PDFJS.build = '9e335a6';
+PDFJS.version = '1.2.109';
+PDFJS.build = '875588d';
 
 (function pdfjsWrapper() {
   // Use strict in our context only - users might not want it
diff --git a/build/pdf.worker.js b/build/pdf.worker.js
index 62c95fdf1..fa30a1f09 100644
--- a/build/pdf.worker.js
+++ b/build/pdf.worker.js
@@ -22,8 +22,8 @@ if (typeof PDFJS === 'undefined') {
   (typeof window !== 'undefined' ? window : this).PDFJS = {};
 }
 
-PDFJS.version = '1.2.107';
-PDFJS.build = '9e335a6';
+PDFJS.version = '1.2.109';
+PDFJS.build = '875588d';
 
 (function pdfjsWrapper() {
   // Use strict in our context only - users might not want it
diff --git a/package.json b/package.json
index b8303482c..ec78fef3a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pdfjs-dist",
-  "version": "1.2.107",
+  "version": "1.2.109",
   "description": "Generic build of Mozilla's PDF.js library.",
   "keywords": [
     "Mozilla",
diff --git a/web/pdf_viewer.js b/web/pdf_viewer.js
index d50fb0429..70c04fad9 100644
--- a/web/pdf_viewer.js
+++ b/web/pdf_viewer.js
@@ -2707,7 +2707,7 @@ var PDFViewer = (function pdfViewer() {
     },
 
     get isChangingPresentationMode() {
-      return this.PresentationModeState === PresentationModeState.CHANGING;
+      return this.presentationModeState === PresentationModeState.CHANGING;
     },
 
     get isHorizontalScrollbarEnabled() {