diff --git a/package.json b/package.json
index e0e08f3..89c8359 100644
--- a/package.json
+++ b/package.json
@@ -31,8 +31,8 @@
     "nyc": "^14.1.1",
     "ot-json1": "^1.0.1",
     "rich-text": "^4.1.0",
-    "sharedb": "^3.0.0 || ^4.0.0",
-    "sinon": "^11.1.2"
+    "sharedb": "^6.0.0",
+    "sinon": "^22.0.0"
   },
   "author": "Avital Oliver",
   "license": "MIT",
diff --git a/test/test.js b/test/test.js
index a93803c..4145de3 100644
--- a/test/test.js
+++ b/test/test.js
@@ -30,7 +30,9 @@ describe('db', function() {
   });
 
   it('preserves doc metadata after deletion', function(done) {
-    var clock = sinon.useFakeTimers(1000000);
+    // Only fake Date — newer Sinon also fakes process.nextTick by default,
+    // which stalls ShareDB's async callbacks and times the test out.
+    var clock = sinon.useFakeTimers({now: 1000000, toFake: ['Date']});
     function expectMeta(property, value) {
       var snapshot = db._getSnapshotSync('testcollection', 'test1', true);
       expect(snapshot).to.have.property('m');