diff --git a/idescriptor/models.py b/idescriptor/models.py
index 593e9a2..a8e1135 100644
--- a/idescriptor/models.py
+++ b/idescriptor/models.py
@@ -8,7 +8,7 @@ from django.urls import reverse
 from django.core.files import File
 from django.utils.translation import gettext_lazy as _
 from django.db.models import Q
-from datetime import datetime
+from django.utils import timezone
 
 from imagebot import settings
 
@@ -45,7 +45,8 @@ class Image(models.Model):
 
     def set_image_posted(self):
         self.number_times_posted += 1
-        self.last_posted = datetime.now()
+        self.last_posted = timezone.now()
+        self.save()
 
     @staticmethod
     def consume():
@@ -70,5 +71,5 @@ class Image(models.Model):
 
     @staticmethod
     def get_image_to_post():
-        image = Image.objects.filter(Q(alt_text__isnull=False) & Q(title__isnull=False)).first()
+        image = Image.objects.filter(Q(alt_text__isnull=False) & Q(title__isnull=False)).order_by('last_posted').first()
         return image