diff --git a/package-lock.json b/package-lock.json
index 3992911..672aa57 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "mobility-metrics",
-  "version": "4.1.0",
+  "version": "4.2.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 1bfec78..5938dbc 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mobility-metrics",
-  "version": "4.1.0",
+  "version": "4.2.0",
   "description": "tools for aggregating mobility data",
   "bin": "./src/cli.js",
   "scripts": {