diff --git a/package.json b/package.json
index 90608b13..1ca98264 100644
--- a/package.json
+++ b/package.json
@@ -61,18 +61,18 @@
     "bluebird": "^3.4.1",
     "color": "^0.11.3",
     "nan": "^2.4.0",
-    "semver": "^5.2.0",
+    "semver": "^5.3.0",
     "request": "^2.74.0",
     "tar": "^2.2.1"
   },
   "devDependencies": {
     "async": "^2.0.1",
     "bufferutil": "^1.2.1",
-    "coveralls": "^2.11.9",
-    "exif-reader": "^1.0.0",
+    "coveralls": "^2.11.12",
+    "exif-reader": "^1.0.1",
     "icc": "^0.0.2",
     "istanbul": "^0.4.4",
-    "mocha": "^2.5.3",
+    "mocha": "^3.0.0",
     "mocha-jshint": "^2.3.1",
     "node-cpplint": "^0.4.0",
     "rimraf": "^2.5.4",
diff --git a/test/unit/trim.js b/test/unit/trim.js
index fc190f1c..ffdc2424 100644
--- a/test/unit/trim.js
+++ b/test/unit/trim.js
@@ -38,7 +38,7 @@ describe('Trim borders', function() {
 
   describe('Invalid thresholds', function() {
     [-1, 100, 'fail', {}].forEach(function(threshold) {
-      it(threshold, function() {
+      it(JSON.stringify(threshold), function() {
         assert.throws(function() {
           sharp().trim(threshold);
         });