diff --git a/package.json b/package.json
new file mode 100644
index 0000000..6e3aeca
--- /dev/null
+++ b/package.json
@@ -0,0 +1,14 @@
+{
+  "name": "coriolis-data",
+  "version": "1.0.0",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/cmmcleod/coriolis-data"
+  },
+  "main": "index.js",
+  "homepage": "http://coriolis.io",
+  "bugs": "https://github.com/cmmcleod/coriolis/issues",
+  "private": true,
+  "engine": "node >= 0.12.2",
+  "license": "MIT"
+}
diff --git a/ships/federal_corvette.json b/ships/federal_corvette.json
index 24a527a..6cb6a85 100644
--- a/ships/federal_corvette.json
+++ b/ships/federal_corvette.json
@@ -13,7 +13,7 @@
       "baseShieldStrength": 555,
       "baseArmour": 666,
       "hullMass": 900,
-      "masslock": null,
+      "masslock": 24,
       "pipSpeed": 0.125
     },
     "retailCost": 187969450,
diff --git a/ships/imperial_cutter.json b/ships/imperial_cutter.json
index fecb47c..b554abd 100644
--- a/ships/imperial_cutter.json
+++ b/ships/imperial_cutter.json
@@ -13,7 +13,7 @@
       "baseShieldStrength": 605,
       "baseArmour": 720,
       "hullMass": 1100,
-      "masslock": null,
+      "masslock": 27,
       "pipSpeed": 0.05
     },
     "retailCost": 208969450,