diff --git a/lib/config/migration.js b/lib/config/migration.js
index cbbd4c805b4aabd00a553f4c728d5d555d8d173c..04f1d9ba43e7b6eb7b517091313c28b05626b8bf 100644
--- a/lib/config/migration.js
+++ b/lib/config/migration.js
@@ -29,7 +29,9 @@ function migrateConfig(config) {
       migratedConfig.schedule = [val];
     } else if (key === 'packages') {
       isMigrated = true;
-      migratedConfig.packageRules = migrateConfig(val);
+      migratedConfig.packageRules = migratedConfig.packages.map(
+        p => migrateConfig(p).migratedConfig
+      );
       delete migratedConfig.packages;
     } else if (key === 'packageName') {
       isMigrated = true;
diff --git a/test/config/__snapshots__/migration.spec.js.snap b/test/config/__snapshots__/migration.spec.js.snap
index 8c7d0c1a2f15bff54d0db66e57011311395ebbed..cafa25b24e6b1545d44cdf48e4699393c8b697bc 100644
--- a/test/config/__snapshots__/migration.spec.js.snap
+++ b/test/config/__snapshots__/migration.spec.js.snap
@@ -6,20 +6,17 @@ Object {
   "optionalDependencies": Object {
     "respectLatest": false,
   },
-  "packageRules": Object {
-    "isMigrated": true,
-    "migratedConfig": Object {
-      "0": Object {
-        "enabled": false,
-        "packageNames": Array [
-          "angular",
-        ],
-        "packagePatterns": Array [
-          "ang",
-        ],
-      },
+  "packageRules": Array [
+    Object {
+      "enabled": false,
+      "packageNames": Array [
+        "angular",
+      ],
+      "packagePatterns": Array [
+        "ang",
+      ],
     },
-  },
+  ],
   "schedule": Array [
     "after 5pm",
   ],