diff --git a/package.json b/package.json
index f91e568..4407a96 100644
--- a/package.json
+++ b/package.json
@@ -73,7 +73,7 @@
     "topojson-client": "^2.1.0",
     "ts-node": "^5.0.1",
     "typescript": "^2.6.2",
-    "underscore": "^1.8.3",
+    "underscore": "^1.12.1",
     "webpack": "^1.13.3",
     "webpack-sources": "^1.1.0"
   },
diff --git a/yarn.lock b/yarn.lock
index dcd9965..412239f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4857,9 +4857,10 @@ undefsafe@^2.0.2:
   dependencies:
     debug "^2.2.0"
 
-underscore@^1.8.3:
-  version "1.9.1"
-  resolved "https://registry.yarnpkg.com/underscore/-/underscore-1.9.1.tgz#06dce34a0e68a7babc29b365b8e74b8925203961"
+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-value@^1.0.0:
   version "1.0.1"