diff --git a/test/bench/package.json b/test/bench/package.json
index 780feb3b..142c708c 100644
--- a/test/bench/package.json
+++ b/test/bench/package.json
@@ -8,16 +8,16 @@
     "test": "node perf && node random && node parallel"
   },
   "devDependencies": {
-    "async": "^3.1.0",
-    "benchmark": "^2.1.4",
-    "gm": "^1.23.1",
-    "imagemagick": "^0.1.3",
-    "jimp": "^0.16.0",
-    "mapnik": "^4.5.2",
-    "semver": "^7.1.1"
+    "async": "3.2.0",
+    "benchmark": "2.1.4",
+    "gm": "1.23.1",
+    "imagemagick": "0.1.3",
+    "jimp": "0.16.1",
+    "mapnik": "4.5.5",
+    "semver": "7.3.4"
   },
   "license": "Apache-2.0",
   "engines": {
-    "node": ">=10.16.0"
+    "node": "14"
   }
 }