diff --git a/package.json b/package.json
index 353f5a492..6f7c7f730 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "._": "as this would overwrite / update the JSON, not the master CSON!",
   "*/": "----------------------------------------------------------------------------",
   "name": "readium-js-viewer",
-  "version": "0.31.0-alpha",
+  "version": "0.31.0",
   "engines": {
     "node": ">=4",
     "npm": ">=2",
@@ -47,39 +47,39 @@
   ],
   "dependencies": {
     "concurrently": "^3.6.0",
-    "http-server": "github:danielweck/http-server#master",
     "npm-run-all": "^4.1.3",
-    "opener": "^1.4.3"
+    "opener": "^1.4.3",
+    "http-server": "github:danielweck/http-server#master"
   },
   "devDependencies": {
-    "JSON2": "^0.1.0",
+    "keymaster": "github:danielweck/keymaster#master",
+    "jath": "github:danielweck/jath#master",
+    "mathjax-single-file": "github:danielweck/MathJax-single-file#master",
     "bootstrap": "3.x",
     "bootstrap-accessibility-plugin": "github:paypal/bootstrap-accessibility-plugin#master",
-    "chai": "3.x",
-    "chai-as-promised": "^7.1.1",
-    "clean-css-cli": "^4.1.10",
-    "crx": "^3.2.1",
-    "decompress-zip": "^0.3.1",
-    "gift": "^0.10.1",
-    "github": "12.x",
-    "grunt-selenium-webdriver": "github:levexis/grunt-selenium-webdriver#master",
     "hammerjs": "^2.0.8",
-    "hogan": "^1.0.2",
-    "hogan.js": "^3.0.2",
-    "httpreq": "^0.4.24",
-    "jath": "github:danielweck/jath#master",
     "jquery-hammerjs": "^2.0.0",
-    "keymaster": "github:danielweck/keymaster#master",
-    "mathjax-single-file": "github:danielweck/MathJax-single-file#master",
-    "mocha": "^5.2.0",
-    "phantomjs-prebuilt": "^2.1.16",
-    "remotestoragejs": "^1.0.3",
-    "requirejs-hogan-plugin": "^0.3.1",
     "screenfull": "^3.3.2",
+    "JSON2": "^0.1.0",
+    "hogan": "^1.0.2",
+    "requirejs-hogan-plugin": "^0.3.1",
+    "remotestoragejs": "^1.0.3",
     "spin.js": "2.x",
+    "gift": "^0.10.1",
+    "clean-css-cli": "^4.1.10",
     "uglify-js": "^3.4.1",
+    "mocha": "^5.2.0",
     "wd": "^1.9.0",
-    "xml2js": "^0.4.19"
+    "phantomjs-prebuilt": "^2.1.16",
+    "grunt-selenium-webdriver": "github:levexis/grunt-selenium-webdriver#master",
+    "crx": "^3.2.1",
+    "chai": "3.x",
+    "chai-as-promised": "^7.1.1",
+    "github": "12.x",
+    "hogan.js": "^3.0.2",
+    "httpreq": "^0.4.24",
+    "xml2js": "^0.4.19",
+    "decompress-zip": "^0.3.1"
   },
   "scripts": {
     "cson2json": "node ./readium-js/readium-shared-js/readium-build-tools/concat.js \"package/*.cson\" package.cson && node ./readium-js/readium-shared-js/node_modules/cson/bin/cson2json package.cson > package.json && node ./readium-js/readium-shared-js/node_modules/rimraf/bin.js package.cson && node readium-js/readium-shared-js/readium-build-tools/optimizePackageJsonScripts.js",
@@ -172,4 +172,4 @@
     "deploy:cloudReaderLite:copy:sourcemap": "node ./readium-js/readium-shared-js/node_modules/ncp/bin/ncp dist/cloud-reader-lite_sourcemap/ dist/cloud-reader-lite/scripts/ && ( node ./readium-js/readium-shared-js/node_modules/ncp/bin/ncp dist/zip_sourcemap/ dist/cloud-reader-lite/scripts/zip/ || echo \"=== SUCCESS [ignore previous error]: no sourcemaps were generated for zip web-worker, deflate, inflate (no uglification).\" )",
     "deploy:chromeApp:copy:sourcemap": "node ./readium-js/readium-shared-js/node_modules/ncp/bin/ncp dist/chrome-app_sourcemap/ dist/chrome-app/scripts/"
   }
-}
+}
\ No newline at end of file
diff --git a/package/package_base.cson b/package/package_base.cson
index 870c07161..ef95bf2b4 100644
--- a/package/package_base.cson
+++ b/package/package_base.cson
@@ -42,7 +42,7 @@
 
 name: "readium-js-viewer"
 
-version: "0.31.0-alpha"
+version: "0.31.0"
 
 engines:
     node: ">=4"
diff --git a/readium-js b/readium-js
index c26a93528..f99dcc41b 160000
--- a/readium-js
+++ b/readium-js
@@ -1 +1 @@
-Subproject commit c26a9352839de4164766876681ae9415d432cecc
+Subproject commit f99dcc41b0ebb75ba7e7faea8c70800cf4391486