diff --git a/transitrichhousing/yarn.lock b/transitrichhousing/yarn.lock
index e240a3e..9636617 100644
--- a/transitrichhousing/yarn.lock
+++ b/transitrichhousing/yarn.lock
@@ -52,8 +52,8 @@ jsonfile@^3.0.0:
     graceful-fs "^4.1.6"
 
 lodash@^4.14.0:
-  version "4.17.5"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.5.tgz#99a92d65c0272debe8c96b6057bc8fbfa3bed511"
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
 
 lru-cache@^4.0.0:
   version "4.1.2"