diff --git a/integration-tests/lockfile/lockfile.sh b/integration-tests/lockfile/lockfile.sh
new file mode 100755
index 00000000..e7872269
--- /dev/null
+++ b/integration-tests/lockfile/lockfile.sh
@@ -0,0 +1,32 @@
+# make sure errors stop the script
+set -e
+
+echo "add patch-package"
+npm i $1
+alias patch-package=./node_modules/.bin/patch-package
+
+echo "Add left-pad"
+npm i left-pad@1.3.0
+
+testLockFile() {
+    echo "Version test $1"
+    npm i --lockfile-version $1
+
+    echo "cleanup patches"
+    npx rimraf patches
+
+    echo "replace pad with yarn in left-pad/index.js"
+    npx replace pad npm node_modules/left-pad/index.js
+
+    echo "patch-package should run"
+    patch-package left-pad
+
+    echo "check that the patch is created"
+    test -f patches/left-pad+1.3.0.patch || exit 1
+}
+
+echo "test lockfile v2"
+testLockFile 2
+
+echo "test lockfile v3"
+testLockFile 3
diff --git a/integration-tests/lockfile/lockfile.test.ts b/integration-tests/lockfile/lockfile.test.ts
new file mode 100644
index 00000000..7042e98c
--- /dev/null
+++ b/integration-tests/lockfile/lockfile.test.ts
@@ -0,0 +1,2 @@
+import { runIntegrationTest } from "../runIntegrationTest"
+runIntegrationTest({ projectName: "lockfile", shouldProduceSnapshots: false })
diff --git a/integration-tests/lockfile/package.json b/integration-tests/lockfile/package.json
new file mode 100644
index 00000000..8fb9a92a
--- /dev/null
+++ b/integration-tests/lockfile/package.json
@@ -0,0 +1,11 @@
+{
+  "name": "lockfile",
+  "version": "1.0.0",
+  "description": "integration test for patch-package",
+  "main": "index.js",
+  "author": "anas10",
+  "license": "ISC",
+  "dependencies": {
+    "left-pad": "1.3.0"
+  }
+}
diff --git a/integration-tests/lockfile/yarn.lock b/integration-tests/lockfile/yarn.lock
new file mode 100644
index 00000000..7cc1da5c
--- /dev/null
+++ b/integration-tests/lockfile/yarn.lock
@@ -0,0 +1,8 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+"left-pad@^1.1.3":
+  "integrity" "sha512-XI5MPzVNApjAyhQzphX8BkmKsKUxD4LdyK24iZeQGinBN9yTQT3bFlCBy/aVx2HrNcqQGsdot8ghrjyrvMCoEA=="
+  "resolved" "https://registry.npmjs.org/left-pad/-/left-pad-1.3.0.tgz"
+  "version" "1.3.0"
diff --git a/src/getPackageResolution.ts b/src/getPackageResolution.ts
index afe6265b..ccfb3612 100644
--- a/src/getPackageResolution.ts
+++ b/src/getPackageResolution.ts
@@ -106,11 +106,17 @@ export function getPackageResolution({
       }
     }
     lockFileStack.reverse()
-    const relevantStackEntry = lockFileStack.find(
-      (entry) =>
-        entry.dependencies && packageDetails.name in entry.dependencies,
-    )
-    const pkg = relevantStackEntry.dependencies[packageDetails.name]
+    const relevantStackEntry = lockFileStack.find((entry) => {
+      if (entry.dependencies) {
+        return entry.dependencies && packageDetails.name in entry.dependencies
+      } else if (entry.packages) {
+        return entry.packages && packageDetails.path in entry.packages
+      }
+      throw new Error("Cannot find dependencies or packages in lockfile")
+    })
+    const pkg = relevantStackEntry.dependencies
+      ? relevantStackEntry.dependencies[packageDetails.name]
+      : relevantStackEntry.packages[packageDetails.path]
     return pkg.resolved || pkg.version || pkg.from
   }
 }
@@ -120,7 +126,6 @@ if (require.main === module) {
   if (!packageDetails) {
     console.error(`Can't find package ${process.argv[2]}`)
     process.exit(1)
-    throw new Error()
   }
   console.log(
     getPackageResolution({