diff --git a/apps/PatientDataExtractorService/package.json b/apps/PatientDataExtractorService/package.json
index 62470d3..91916ec 100755
--- a/apps/PatientDataExtractorService/package.json
+++ b/apps/PatientDataExtractorService/package.json
@@ -2,7 +2,7 @@
   "name": "patientdataextractorservice",
   "private": true,
   "scripts": {
-    "postinstall": "pip install -r requirements.txt",
-    "dev": "python3 main.py"
+    "postinstall": "python3 -m venv .venv && .venv/bin/pip install -r requirements.txt",
+    "dev": ".venv/bin/python3 main.py"
   }
 }
diff --git a/apps/PaymentOCRService/package.json b/apps/PaymentOCRService/package.json
index d082d6a..419bc2c 100755
--- a/apps/PaymentOCRService/package.json
+++ b/apps/PaymentOCRService/package.json
@@ -2,7 +2,7 @@
   "name": "paymentocrservice",
   "private": true,
   "scripts": {
-    "postinstall": "pip install -r requirements.txt",
-    "dev": "python3 main.py"
+    "postinstall": "python3 -m venv .venv && .venv/bin/pip install -r requirements.txt",
+    "dev": ".venv/bin/python3 main.py"
   }
 }
diff --git a/apps/SeleniumService/package.json b/apps/SeleniumService/package.json
index a6b190f..e5271f8 100755
--- a/apps/SeleniumService/package.json
+++ b/apps/SeleniumService/package.json
@@ -2,6 +2,6 @@
   "name": "seleniumservice",
   "private": true,
   "scripts": {
-    "postinstall": "pip install -r requirements.txt"
+    "postinstall": "python3 -m venv .venv && .venv/bin/pip install -r requirements.txt"
   }
 }
diff --git a/apps/SeleniumServiceold/package.json b/apps/SeleniumServiceold/package.json
index be78386..dfe8ebb 100755
--- a/apps/SeleniumServiceold/package.json
+++ b/apps/SeleniumServiceold/package.json
@@ -2,6 +2,6 @@
   "name": "seleniumserviceold",
   "private": true,
   "scripts": {
-    "postinstall": "pip install -r requirements.txt"
+    "postinstall": "python3 -m venv .venv && .venv/bin/pip install -r requirements.txt"
   }
 }