diff --git a/src/migrations/0023_postgresql_11_to_13.py b/src/migrations/0023_postgresql_11_to_13.py
index 206143dbb..5c788584e 100644
--- a/src/migrations/0023_postgresql_11_to_13.py
+++ b/src/migrations/0023_postgresql_11_to_13.py
@@ -1,5 +1,6 @@
 import subprocess
 import time
+import os
 
 from moulinette import m18n
 from yunohost.utils.error import YunohostError, YunohostValidationError
@@ -19,7 +20,7 @@ class MyMigration(Migration):
 
     def run(self):
 
-        if os.system('grep -A10 "ynh-deps" /var/lib/dpkg/status | grep "Package:\|Depends:" | grep -B1 postgresql') != 0:
+        if os.system('grep -A10 "ynh-deps" /var/lib/dpkg/status | grep -E "Package:|Depends:" | grep -B1 postgresql') != 0:
             logger.info("No YunoHost app seem to require postgresql... Skipping!")
             return