diff --git a/package.json b/package.json
index 247b3b27d..fad8a48af 100644
--- a/package.json
+++ b/package.json
@@ -21,16 +21,13 @@
   "license": "MIT",
   "devDependencies": {
     "atom-jasmine2-test-runner": "^1.0.0",
-    "cpy-cli": "^1.0.1",
     "dedent": "^0.6.0",
     "electron": "^30",
     "jasmine": "^2.4.1",
     "jasmine-core": "^2.4.1",
-    "json-diff": "^0.3.1",
     "random-seed": "^0.2.0",
     "regression": "^1.2.1",
     "rimraf": "~2.2.2",
-    "standard": "^10.0.3",
     "temp": "^0.8.3",
     "yargs": "^6.5.0"
   },
@@ -39,13 +36,11 @@
     "@pulsar-edit/superstring": "^3.0.4",
     "delegato": "^1.0.0",
     "diff": "^2.2.1",
-    "emissary": "^1.0.0",
     "event-kit": "^2.4.0",
     "fs-admin": "^0.19.0",
     "fs-plus": "^3.0.0",
     "grim": "^2.0.2",
     "mkdirp": "^0.5.1",
-    "serializable": "^1.0.3",
     "underscore-plus": "^1.0.0",
     "winattr": "^3.0.0"
   },