diff --git a/spec-main/package.json b/spec-main/package.json
index 8e65c4879fc86..287072fcf9626 100644
--- a/spec-main/package.json
+++ b/spec-main/package.json
@@ -12,6 +12,6 @@
   "dependencies": {
     "chai-as-promised": "^7.1.1",
     "dirty-chai": "^2.0.1",
-    "pdfjs-dist": "^2.2.228"
+    "pdfjs-dist": "^2.4.456"
   }
 }