diff --git a/e2e/Makefile b/e2e/Makefile
index decc6cbd..6e7a7c78 100644
--- a/e2e/Makefile
+++ b/e2e/Makefile
@@ -1,4 +1,4 @@
-test-e2e: test-e2e-minimal test-e2e-individually test-e2e-complete
+test-e2e: test-e2e-minimal test-e2e-individually test-e2e-complete test-e2e-config
 
 build:
 	npm run build
@@ -23,3 +23,7 @@ test-e2e-complete: build
 	cd ./.test-artifacts/complete/.serverless && unzip complete-example.zip
 	npx jest -c jest.config.e2e.js --ci ./e2e/complete.test.ts
 	rm -fr ./.test-artifacts
+
+test-e2e-config: build
+	rm -fr ./.test-artifacts && mkdir -p ./.test-artifacts/config && rsync -r ./examples/config/ ./.test-artifacts/config/
+	cd ./.test-artifacts/config && pnpm install && npx sls package
diff --git a/examples/config/config.js b/examples/config/config.js
index 016a74b8..9f2c4d64 100644
--- a/examples/config/config.js
+++ b/examples/config/config.js
@@ -1,6 +1,6 @@
 module.exports = () => {
   return {
-    packager: 'npm',
+    packager: 'pnpm',
     bundle: true,
     minify: true,
     sourcemap: false,
diff --git a/src/packagers/npm.ts b/src/packagers/npm.ts
index 913dcc67..69e7c31c 100644
--- a/src/packagers/npm.ts
+++ b/src/packagers/npm.ts
@@ -271,6 +271,7 @@ export class NPM implements Packager {
 
   async install(cwd: string, extraArgs: Array<string>) {
     const command = /^win/.test(process.platform) ? 'npm.cmd' : 'npm';
+
     const args = ['install', ...extraArgs];
 
     await spawnProcess(command, args, { cwd });
diff --git a/src/packagers/pnpm.ts b/src/packagers/pnpm.ts
index b714e789..3c562c14 100644
--- a/src/packagers/pnpm.ts
+++ b/src/packagers/pnpm.ts
@@ -41,7 +41,7 @@ export class Pnpm implements Packager {
       const processOutput = await spawnProcess(command, args, { cwd });
       const depJson = processOutput.stdout;
 
-      return JSON.parse(depJson);
+      return JSON.parse(depJson)[0];
     } catch (err) {
       if (err instanceof SpawnError) {
         // Only exit with an error if we have critical npm errors for 2nd level inside
@@ -89,10 +89,10 @@ export class Pnpm implements Packager {
     return lockfile;
   }
 
-  async install(cwd: string, extraArgs: string[], useLockfile = true) {
+  async install(cwd: string, extraArgs: Array<string>) {
     const command = /^win/.test(process.platform) ? 'pnpm.cmd' : 'pnpm';
 
-    const args = useLockfile ? ['install', '--frozen-lockfile', ...extraArgs] : ['install', ...extraArgs];
+    const args = ['install', ...extraArgs];
 
     await spawnProcess(command, args, { cwd });
   }
diff --git a/src/utils.ts b/src/utils.ts
index cd348a83..b2fa42f0 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -93,6 +93,7 @@ export const findProjectRoot = (rootDir?: string) =>
   pipe(
     IOO.fromNullable(rootDir),
     IOO.fold(() => findUpIO('yarn.lock'), IOO.of),
+    IOO.fold(() => findUpIO('pnpm-lock.yaml'), IOO.of),
     IOO.fold(() => findUpIO('package-lock.json'), IOO.of),
     IOO.toUndefined
   )();