diff --git a/package.json b/package.json
index 26c6e22..f2b61c7 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,7 @@
     "cache"
   ],
   "dependencies": {
-    "async-disk-cache": "^1.0.0",
+    "async-disk-cache": "^1.2.0",
     "blank-object": "^1.0.1",
     "broccoli-plugin": "^1.0.0",
     "fs-tree-diff": "^0.5.2",
diff --git a/test/test.js b/test/test.js
index 0c5059f..62ef402 100644
--- a/test/test.js
+++ b/test/test.js
@@ -611,7 +611,7 @@ describe('Filter', function() {
       });
 
       // TODO: we should just deal in observable differences, not reaching into private state
-      expect(f.processor.processor._cache.tmpDir).
+      expect(f.processor.processor._cache.tmpdir).
         to.be.equal(process.env.BROCCOLI_PERSISTENT_FILTER_CACHE_ROOT);
     });