diff --git a/cli.js b/cli.js
index a7bbc3a..9493e13 100755
--- a/cli.js
+++ b/cli.js
@@ -15,6 +15,7 @@ const readPkg = require('read-pkg');
 const Conf = require('conf');
 const { default: PQueue } = require('p-queue');
 const updateNotifier = require('update-notifier');
+const hasYarn = require('has-yarn');
 
 const cli = meow(`
 Usage
@@ -67,6 +68,34 @@ if (['link', 'connect', 'reset'].includes(cmd)) {
     }
 }
 
+let packageManager;
+
+if (hasYarn(cwd)) {
+    packageManager = {
+        add: modules => execa('yarn', ['add', ...modules]),
+        addDev: modules => execa('yarn', ['add', '--dev', ...modules]),
+        pack: (packFile, depPath) =>
+            execa('yarn', ['pack', '--filename', packFile], { cwd: depPath })
+    };
+} else {
+    packageManager = {
+        add: modules => execa('npm', ['install', ...modules]),
+        addDev: modules => execa('npm', ['install', '--save-dev', ...modules]),
+        pack: async (packFile, depPath) => {
+            const parsedPath = path.parse(packFile);
+            const filename = parsedPath.base;
+            // The filename npm creates doesn't have a timestamp
+            const packName = filename.substring(0, filename.lastIndexOf('-')) + '.tgz';
+            const cacheDir = parsedPath.dir;
+
+            await execa('npm', ['pack', depPath], { cwd: cacheDir });
+            fs.renameSync(
+                path.join(cacheDir, packName),
+                path.join(cacheDir, filename));
+        }
+    };
+}
+
 switch (cmd) {
     case 'link':
         link();
@@ -205,13 +234,13 @@ async function reset() {
 
     if (normal.length > 0) {
         spinner.start(`Resetting normal dependencies:  ${normal.join(' ')}`);
-        await execa('yarn', ['add', ...normal]);
+        await packageManager.add(normal);
         spinner.succeed();
     }
 
     if (dev.length > 0) {
         spinner.start(`Resetting dev dependencies: ${dev.join(' ')}`);
-        await execa('yarn', ['add', ...dev, '--dev']);
+        await packageManager.addDev(dev);
         spinner.succeed();
     }
     spinner.start('Cleaning up');
@@ -230,7 +259,7 @@ async function packInstall(configs = []) {
         const name = `./.connect-deps-cache/${config.name}-${config.version}-${Date.now()}.tgz`;
         const packFile = path.join(cwd, name);
 
-        await execa('yarn', ['pack', '--filename', packFile], { cwd: config.path });
+        await packageManager.pack(packFile, config.path);
         if (config.snapshot.type === 'dev') {
             dev.push(`file:${packFile}`);
         } else {
@@ -241,12 +270,12 @@ async function packInstall(configs = []) {
 
     if (normal.length > 0) {
         spinner.start(`Installing dependencies: ${normal.join(' ')}`);
-        await execa('yarn', ['add', ...normal]);
+        await packageManager.add(normal);
         spinner.succeed();
     }
     if (dev.length > 0) {
         spinner.start(`Installing dev dependencies: ${dev.join(' ')}`);
-        await execa('yarn', ['add', '--dev', ...dev]);
+        await packageManager.addDev(dev);
         spinner.succeed();
     }
 }
diff --git a/package.json b/package.json
index 89c6e8a..8d98ca7 100644
--- a/package.json
+++ b/package.json
@@ -34,6 +34,7 @@
         "conf": "^5.0.0",
         "del": "^5.0.0",
         "execa": "^2.0.3",
+        "has-yarn": "^2.1.0",
         "meow": "^5.0.0",
         "ora": "^3.4.0",
         "p-debounce": "^2.1.0",