diff --git a/TD23/package.json b/TD23/package.json
index c3b7589ed91d40acdddaedeaa927aff35b9ca232..f1cf1f142f98a0bf2f136fdbd15091988d68550b 100644
--- a/TD23/package.json
+++ b/TD23/package.json
@@ -1,6 +1,6 @@
 {
   "type": "module",
   "scripts": {
-    "test": "PROGRESSION=\"${npm_config_progression}\" vitest run all.test.js"
+    "test": "cross-env PROGRESSION=\"${npm_config_progression}\" vitest run all.test.js"
   }
 }
diff --git a/TD45/package.json b/TD45/package.json
index c3b7589ed91d40acdddaedeaa927aff35b9ca232..f1cf1f142f98a0bf2f136fdbd15091988d68550b 100644
--- a/TD45/package.json
+++ b/TD45/package.json
@@ -1,6 +1,6 @@
 {
   "type": "module",
   "scripts": {
-    "test": "PROGRESSION=\"${npm_config_progression}\" vitest run all.test.js"
+    "test": "cross-env PROGRESSION=\"${npm_config_progression}\" vitest run all.test.js"
   }
 }
diff --git a/package.json b/package.json
index 33a3579d5aaa08fc3984ec9ddec76c249fdbe283..55c36ecd51cc0dac63a9947af9ecd1fd1b483c04 100644
--- a/package.json
+++ b/package.json
@@ -9,6 +9,7 @@
     "@fastify/session": "^10.7.2",
     "@fastify/static": "^7.0.3",
     "@fastify/view": "^9.0.0",
+    "cross-env": "^7.0.3",
     "ejs": "^3.1.10",
     "fastify": "^4.26.2",
     "http-server": "^14.1.1"