diff --git a/transitrichhousing/package.json b/transitrichhousing/package.json
index f994bfe..79ce497 100644
--- a/transitrichhousing/package.json
+++ b/transitrichhousing/package.json
@@ -1,6 +1,6 @@
 {
     "dependencies": {
-        "async": "^2.4.1",
+        "async": "^2.6.4",
         "geojson": "^0.4.1",
         "jsonfile": "^3.0.0",
         "st": "^1.2.0"
diff --git a/transitrichhousing/yarn.lock b/transitrichhousing/yarn.lock
index e240a3e..bd1c251 100644
--- a/transitrichhousing/yarn.lock
+++ b/transitrichhousing/yarn.lock
@@ -8,11 +8,11 @@ async-cache@~1.1.0:
   dependencies:
     lru-cache "^4.0.0"
 
-async@^2.4.1:
-  version "2.6.0"
-  resolved "https://registry.yarnpkg.com/async/-/async-2.6.0.tgz#61a29abb6fcc026fea77e56d1c6ec53a795951f4"
+async@^2.6.4:
+  version "2.6.4"
+  resolved "https://registry.yarnpkg.com/async/-/async-2.6.4.tgz#706b7ff6084664cd7eae713f6f965433b5504221"
   dependencies:
-    lodash "^4.14.0"
+    lodash "^4.17.14"
 
 bl@~1.2.1:
   version "1.2.2"
@@ -51,9 +51,9 @@ jsonfile@^3.0.0:
   optionalDependencies:
     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"
+lodash@^4.17.14:
+  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"