diff --git a/frontend/package.json b/frontend/package.json
index ba3f90cec5..6c2a079e3b 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -60,7 +60,8 @@
     "vuex": "^3.1.2",
     "xml-js": "^1.6.11",
     "yan-progress": "^1.0.3",
-    "vue2-ace-editor": "0.0.15"
+    "vue2-ace-editor": "0.0.15",
+    "pdfjs-dist": "2.5.207"
   },
   "devDependencies": {
     "@vue/cli-plugin-babel": "^4.1.0",