diff --git a/package-lock.json b/package-lock.json
index 31171ac..8645502 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -6934,6 +6934,11 @@
       "integrity": "sha512-/P5lkRXkWHNAbcJIiHPfRoKqyd7bsyCma1hZNUGfn20qm64T6ZBlrzprymeu918H+mB/0rIg2gGK/BXkhhYgBw==",
       "dev": true
     },
+    "underscore": {
+      "version": "1.11.0",
+      "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.11.0.tgz",
+      "integrity": "sha512-xY96SsN3NA461qIRKZ/+qox37YXPtSBswMGfiNptr+wrt6ds4HaMw23TP612fEyGekRE6LNRiLYr/aqbHXNedw=="
+    },
     "universalify": {
       "version": "0.1.2",
       "resolved": "https://registry.npmjs.org/universalify/-/universalify-0.1.2.tgz",
diff --git a/package.json b/package.json
index 8c1e2f8..59b8d10 100644
--- a/package.json
+++ b/package.json
@@ -36,6 +36,7 @@
     "sequelize": "^5.21.5",
     "settings-sharelatex": "git+https://github.com/sharelatex/settings-sharelatex.git#v1.1.0",
     "sqlite3": "^4.1.1",
+    "underscore": "^1.11.0",
     "v8-profiler-node8": "^6.1.1",
     "wrench": "~1.5.9"
   },