diff --git a/package.json b/package.json
index a361f3e2..5565274d 100644
--- a/package.json
+++ b/package.json
@@ -111,6 +111,7 @@
     "node-forge": "^0.7.6",
     "node-md6": "^0.1.0",
     "notepack.io": "^2.1.3",
+    "npx": "^10.2.0",
     "nwmatcher": "^1.4.4",
     "otp": "^0.1.3",
     "popper.js": "^1.14.4",
@@ -134,6 +135,6 @@
     "docs": "grunt docs",
     "lint": "grunt lint",
     "newop": "node --experimental-modules src/core/config/scripts/newOperation.mjs",
-    "postinstall": "[ -f node_modules/crypto-api/src/crypto-api.mjs ] || npx j2m node_modules/crypto-api/src/crypto-api.js"
+    "postinstall": "[ -f node_modules/crypto-api/src/crypto-api.mjs ] || node_modules/.bin/npx j2m node_modules/crypto-api/src/crypto-api.js"
   }
 }