diff --git a/test/bench/package.json b/test/bench/package.json
index fdda7df6..66381cf4 100755
--- a/test/bench/package.json
+++ b/test/bench/package.json
@@ -12,7 +12,7 @@
     "imagemagick-native": "^1.6.0",
     "gm": "^1.17.0",
     "async": "^0.9.0",
-    "semver": "^4.1.0",
+    "semver": "^4.2.0",
     "benchmark": "^1.0.0"
   },
   "license": "Apache 2.0",
diff --git a/test/bench/random.js b/test/bench/random.js
index 6f8c84ca..5f3d6903 100755
--- a/test/bench/random.js
+++ b/test/bench/random.js
@@ -12,7 +12,7 @@ var min = 320;
 var max = 960;
 
 var randomDimension = function() {
-  return Math.random() * (max - min) + min;
+  return Math.ceil(Math.random() * (max - min) + min);
 };
 
 new Benchmark.Suite('random').add('imagemagick', {