diff --git a/app.js b/app.js
index f7cb031..a91284a 100644
--- a/app.js
+++ b/app.js
@@ -22,9 +22,16 @@
 let fs = require('fs'),
     path = require('path');
 
+const commandLineArgs = require('command-line-args');
+const optionDefinitions = [
+    { name: 'config', alias: 'c', type: String, defaultValue: './config.json' },
+];
+
+const options = commandLineArgs(optionDefinitions);
+
 global.syzoj = {
   rootDir: __dirname,
-  config: require('./config.json'),
+  config: require(options.config),
   models: [],
   modules: [],
   db: null,
diff --git a/package-lock.json b/package-lock.json
index 6001afa..18c4566 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -87,6 +87,14 @@
         "sprintf-js": "1.0.3"
       }
     },
+    "array-back": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/array-back/-/array-back-2.0.0.tgz",
+      "integrity": "sha512-eJv4pLLufP3g5kcZry0j6WXpIbzYw9GUB4mVJZno9wfwiBxbizTnHCw3VJb07cBihbFX48Y7oSrW9y+gt4glyw==",
+      "requires": {
+        "typical": "2.6.1"
+      }
+    },
     "array-equal": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/array-equal/-/array-equal-1.0.0.tgz",
@@ -364,6 +372,16 @@
         "delayed-stream": "1.0.0"
       }
     },
+    "command-line-args": {
+      "version": "4.0.7",
+      "resolved": "https://registry.npmjs.org/command-line-args/-/command-line-args-4.0.7.tgz",
+      "integrity": "sha512-aUdPvQRAyBvQd2n7jXcsMDz68ckBJELXNzBybCHOibUWEg0mWTnaYCSRU8h9R+aNRSvDihJtssSRCiDRpLaezA==",
+      "requires": {
+        "array-back": "2.0.0",
+        "find-replace": "1.0.3",
+        "typical": "2.6.1"
+      }
+    },
     "commander": {
       "version": "2.8.1",
       "resolved": "https://registry.npmjs.org/commander/-/commander-2.8.1.tgz",
@@ -979,6 +997,25 @@
         "unpipe": "1.0.0"
       }
     },
+    "find-replace": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/find-replace/-/find-replace-1.0.3.tgz",
+      "integrity": "sha1-uI5zZNLZyVlVnziMZmcNYTBEH6A=",
+      "requires": {
+        "array-back": "1.0.4",
+        "test-value": "2.1.0"
+      },
+      "dependencies": {
+        "array-back": {
+          "version": "1.0.4",
+          "resolved": "https://registry.npmjs.org/array-back/-/array-back-1.0.4.tgz",
+          "integrity": "sha1-ZEun8JX3/898Q7Xw3DnTwfA8Bjs=",
+          "requires": {
+            "typical": "2.6.1"
+          }
+        }
+      }
+    },
     "find-up": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/find-up/-/find-up-1.1.2.tgz",
@@ -3627,6 +3664,25 @@
         "terraformer": "1.0.8"
       }
     },
+    "test-value": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/test-value/-/test-value-2.1.0.tgz",
+      "integrity": "sha1-Edpv9nDzRxpztiXKTz/c97t0gpE=",
+      "requires": {
+        "array-back": "1.0.4",
+        "typical": "2.6.1"
+      },
+      "dependencies": {
+        "array-back": {
+          "version": "1.0.4",
+          "resolved": "https://registry.npmjs.org/array-back/-/array-back-1.0.4.tgz",
+          "integrity": "sha1-ZEun8JX3/898Q7Xw3DnTwfA8Bjs=",
+          "requires": {
+            "typical": "2.6.1"
+          }
+        }
+      }
+    },
     "through": {
       "version": "2.3.8",
       "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
@@ -3758,6 +3814,11 @@
       "resolved": "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz",
       "integrity": "sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c="
     },
+    "typical": {
+      "version": "2.6.1",
+      "resolved": "https://registry.npmjs.org/typical/-/typical-2.6.1.tgz",
+      "integrity": "sha1-XAgOXWYcu+OCWdLnCjxyU+hziB0="
+    },
     "uid-safe": {
       "version": "2.1.4",
       "resolved": "https://registry.npmjs.org/uid-safe/-/uid-safe-2.1.4.tgz",
diff --git a/package.json b/package.json
index 12a731b..4c6f436 100644
--- a/package.json
+++ b/package.json
@@ -27,6 +27,7 @@
     "async-lock": "^0.3.9",
     "body-parser": "^1.15.2",
     "cheerio": "^1.0.0-rc.1",
+    "command-line-args": "^4.0.7",
     "cookie-parser": "^1.4.3",
     "cssfilter": "0.0.10",
     "csurf": "^1.9.0",