diff --git a/config.py b/config.py
index fd8df32..04b0d42 100644
--- a/config.py
+++ b/config.py
@@ -4,5 +4,4 @@ user="praktyki"
 password="2a7driUITXFy73tO"
 port="5432"
 default_file = "default.squashfs"
-webssh_port = "8000"
-timezone = "UTC"
\ No newline at end of file
+webssh_port = "8000"
\ No newline at end of file
diff --git a/db.py b/db.py
index 385df56..952bd86 100644
--- a/db.py
+++ b/db.py
@@ -19,7 +19,7 @@ def connect():
     cur = conn.cursor()
 
     with conn.cursor() as cur:
-        cur.execute("SET TIMEZONE = %s", (config.timezone,))
+        cur.execute("SET TIMEZONE = 'UTC';")
         conn.commit()
         cur.execute("""
             CREATE TABLE IF NOT EXISTS image (
diff --git a/utils.py b/utils.py
index d158135..797525a 100644
--- a/utils.py
+++ b/utils.py
@@ -64,10 +64,10 @@ class PingThread(threading.Thread):
             print(date)
             if date is None:
                 return
-            delta = datetime.datetime.now() - date
-            print(datetime.datetime.now())
+            delta = datetime.datetime.utcnow() - date
+            print(datetime.datetime.utcnow())
             print(delta.total_seconds())
-            if delta.total_seconds() < -30:
+            if delta.total_seconds() > 30:
                 db.del_image_allocation_id(self.Id)
                 print("deleted")
         else: