diff --git a/package.json b/package.json
index ab47b61..203181a 100644
--- a/package.json
+++ b/package.json
@@ -40,11 +40,11 @@
     "node": "*"
   },
   "devDependencies": {
-    "mocha": "*",
-    "should": "*",
-    "sax": "*",
-    "async": "*",
-    "sinon": "*"
+    "async": "^2.6.0",
+    "mocha": "^5.0.0",
+    "sax": "^1.2.4",
+    "should": "^13.2.1",
+    "sinon": "^4.2.1"
   },
   "scripts": {
     "test": "node test-runner.js",
diff --git a/test/atoms-cache.js b/test/atoms-cache.js
index 76c315e..aef76a5 100644
--- a/test/atoms-cache.js
+++ b/test/atoms-cache.js
@@ -94,7 +94,7 @@ describe('Atoms and atom names cache', function() {
             function(err) {
                 should.not.exist(err);
                 should.exist(my_name);
-                self.spy.reset();
+                self.spy.resetHistory();
                 self.X.InternAtom(true, my_name, function(err, atom) {
                     should.not.exist(err);
                     my_atom.should.equal(atom);
diff --git a/test/core-KillKlient.js b/test/core-KillKlient.js
index 58387d5..d8125c0 100644
--- a/test/core-KillKlient.js
+++ b/test/core-KillKlient.js
@@ -11,7 +11,7 @@ describe('KillKlient request', function() {
           should.not.exist(err);
           display = dpy;
           X = display.client;
-          root = display.screen[0].root;
+          var root = display.screen[0].root;
           var eventMask = x11.eventMask.SubstructureNotify;
           X.ChangeWindowAttributes(root, { eventMask: eventMask });
           done();