diff --git a/oldto-site/package.json b/oldto-site/package.json
index 76fb532..fcbd862 100644
--- a/oldto-site/package.json
+++ b/oldto-site/package.json
@@ -33,6 +33,6 @@
     "clipboard": "^2.0.0",
     "http-server": "^0.11.1",
     "mapbox-gl-compare": "^0.2.0",
-    "underscore": "^1.8.3"
+    "underscore": "^1.12.1"
   }
 }
diff --git a/oldto-site/yarn.lock b/oldto-site/yarn.lock
index 1850229..599a302 100644
--- a/oldto-site/yarn.lock
+++ b/oldto-site/yarn.lock
@@ -3116,9 +3116,10 @@ uid-number@^0.0.6:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/uid-number/-/uid-number-0.0.6.tgz#0ea10e8035e8eb5b8e4449f06da1c730663baa81"
 
-underscore@^1.8.3:
-  version "1.8.3"
-  resolved "https://registry.yarnpkg.com/underscore/-/underscore-1.8.3.tgz#4f3fb53b106e6097fcf9cb4109f2a5e9bdfa5022"
+underscore@^1.12.1:
+  version "1.12.1"
+  resolved "https://registry.yarnpkg.com/underscore/-/underscore-1.12.1.tgz#7bb8cc9b3d397e201cf8553336d262544ead829e"
+  integrity sha512-hEQt0+ZLDVUMhebKxL4x1BTtDY7bavVofhZ9KZ4aI26X9SRaE+Y3m83XUL1UP2jn8ynjndwCCpEHdUG+9pP1Tw==
 
 union@~0.4.3:
   version "0.4.6"