diff --git a/package.json b/package.json
index c7233e1..c84153e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@torchlight-api/torchlight-cli",
-    "version": "0.0.4",
+    "version": "0.0.5",
     "description": "A CLI for Torchlight - the syntax highlighting API",
     "main": "index.js",
     "scripts": {
diff --git a/src/cache/file.js b/src/cache/file.js
index 4a9f0fa..784d4f4 100644
--- a/src/cache/file.js
+++ b/src/cache/file.js
@@ -13,6 +13,10 @@ const {
  * @constructor
  */
 let File = function (options = {}) {
+    if (!options.directory) {
+        throw new Error('No cache directory specified.');
+    }
+
     this.directory = path.resolve(options.directory)
 
     ensureDirSync(this.directory);