diff --git a/package-lock.json b/package-lock.json
index 382a8fcf..bcac835b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "goertzeljs",
-  "version": "4.2.0",
+  "version": "4.2.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -5631,7 +5631,7 @@
     },
     "pretty-hrtime": {
       "version": "1.0.3",
-      "resolved": "http://registry.npmjs.org/pretty-hrtime/-/pretty-hrtime-1.0.3.tgz",
+      "resolved": "https://registry.npmjs.org/pretty-hrtime/-/pretty-hrtime-1.0.3.tgz",
       "integrity": "sha1-t+PqQkNaTJsnWdmeDyAesZWALuE=",
       "dev": true
     },
diff --git a/package.json b/package.json
index ccce0e35..697b70c7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "goertzeljs",
-  "version": "4.2.0",
+  "version": "4.2.1",
   "description": "A pure JavaScript implementation of the Goertzel algorithm.",
   "main": "index.js",
   "scripts": {