diff --git a/fet2020/blackboard/admin.py b/fet2020/blackboard/admin.py
index e2c0f4a2..e88014c5 100644
--- a/fet2020/blackboard/admin.py
+++ b/fet2020/blackboard/admin.py
@@ -16,5 +16,24 @@ class JobPostingAdmin(admin.ModelAdmin):
         "publish_date",
     ]
 
+    def add_view(self, request, form_url="", extra_context=None):
+        extra_context = extra_context or {}
+        extra_context["help_text"] = "Fette Schriften sind Pflichtfelder."
+        return super().add_view(
+            request,
+            form_url,
+            extra_context=extra_context,
+        )
+
+    def change_view(self, request, object_id, form_url="", extra_context=None):
+        extra_context = extra_context or {}
+        extra_context["help_text"] = "Fette Schriften sind Pflichtfelder."
+        return super().change_view(
+            request,
+            object_id,
+            form_url,
+            extra_context=extra_context,
+        )
+
 
 admin.site.register(JobPosting, JobPostingAdmin)
diff --git a/fet2020/blackboard/forms.py b/fet2020/blackboard/forms.py
index b333ba83..80ef1a31 100644
--- a/fet2020/blackboard/forms.py
+++ b/fet2020/blackboard/forms.py
@@ -25,7 +25,7 @@ class JobPostingForm(forms.ModelForm):
         }
 
         help_texts = {
-            "pdf_location": _("Verwendbare Formate: PDF"),
+            "pdf_location": _("Verwendbares Format: PDF."),
             "salary": _(
                 "in Euro angeben; monatliches Gehalt bei >1h, sonst Stundenlohn."
             ),
diff --git a/fet2020/blackboard/migrations/0004_remove_jobposting_pdf_thumb_location_and_more.py b/fet2020/blackboard/migrations/0004_remove_jobposting_pdf_thumb_location_and_more.py
new file mode 100644
index 00000000..ca7c0b78
--- /dev/null
+++ b/fet2020/blackboard/migrations/0004_remove_jobposting_pdf_thumb_location_and_more.py
@@ -0,0 +1,23 @@
+# Generated by Django 4.0.3 on 2022-04-09 08:02
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('blackboard', '0003_auto_20210624_1503'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='jobposting',
+            name='pdf_thumb_location',
+        ),
+        migrations.AlterField(
+            model_name='jobposting',
+            name='pdf_location',
+            field=models.FileField(upload_to='uploads/blackboard/pdf/', validators=[django.core.validators.FileExtensionValidator(['pdf'])], verbose_name='Stellenausschreibung'),
+        ),
+    ]
diff --git a/fet2020/blackboard/models.py b/fet2020/blackboard/models.py
index 679cacda..8c9f8431 100644
--- a/fet2020/blackboard/models.py
+++ b/fet2020/blackboard/models.py
@@ -3,10 +3,8 @@ import logging
 import os
 from os.path import splitext, basename
 
-import ghostscript
-
 from django.conf import settings
-from django.core.validators import ValidationError
+from django.core.validators import ValidationError, FileExtensionValidator
 from django.db import models
 from django.urls import reverse
 from django.utils import timezone
@@ -33,9 +31,10 @@ class JobPosting(models.Model):
     )
 
     pdf_location = models.FileField(
-        verbose_name="Stellenausschreibung", upload_to="uploads/blackboard/pdf/"
+        verbose_name="Stellenausschreibung",
+        upload_to="uploads/blackboard/pdf/",
+        validators=[FileExtensionValidator(["pdf"])],
     )
-    pdf_thumb_location = models.CharField(max_length=128)
 
     publish_date = models.DateField(
         verbose_name="Veröffentlichung", default=timezone.now
@@ -52,52 +51,3 @@ class JobPosting(models.Model):
 
     def get_absolute_url(self):
         return reverse("blackboard")
-
-    def save(self, *args, **kwargs):
-        super().save(*args, **kwargs)
-
-        if not os.path.exists(settings.MEDIA_ROOT + "uploads/blackboard/thumb/"):
-            os.makedirs(settings.MEDIA_ROOT + "uploads/blackboard/thumb/")
-
-        pdf_thumb_location_full = (
-            settings.MEDIA_ROOT
-            + "uploads/blackboard/thumb/"
-            + splitext(basename(self.pdf_location.name))[0]
-            + ".jpg"
-        )
-
-        self.pdf_thumb_location = (
-            "/files/uploads/blackboard/thumb/"
-            + splitext(basename(self.pdf_location.name))[0]
-            + ".jpg"
-        )
-
-        self.pdf2jpeg(self.pdf_location.path, pdf_thumb_location_full)
-        logger.info("SavenThumbAs: " + self.pdf_thumb_location)
-        super().save(*args, **kwargs)
-    
-    def clean(self):
-        count = 0
-        for i in self.pdf_location.name:
-            if i == ".":
-                count = count + 1
-        if count > 1:  # if more than one dot in filename
-            raise ValidationError(_("Keine Dateien mit >1 Punkten im Namen erlaubt."))
-
-    def pdf2jpeg(self, pdf_input_path, jpeg_output_path):
-        args = [
-            "pef2jpeg",  # actual value doesn't matter
-            "-dNOPAUSE",
-            "-sDEVICE=jpeg",
-            "-dDEVICEWIDTHPOINTS=600",
-            "-dDEVICEHEIGHTPOINTS=800",
-            "-sOutputFile=" + jpeg_output_path,
-            pdf_input_path,
-        ]
-
-        encoding = locale.getpreferredencoding()
-        args = [a.encode(encoding) for a in args]
-
-        # ghostscript.Ghostscript(*args)
-        with ghostscript.Ghostscript(*args) as g:
-            ghostscript.cleanup()
diff --git a/fet2020/blackboard/views.py b/fet2020/blackboard/views.py
index b9581af3..5249d3b7 100644
--- a/fet2020/blackboard/views.py
+++ b/fet2020/blackboard/views.py
@@ -16,7 +16,7 @@ def index(request):
     bb_empty = CustomFlatPage.objects.filter(title__iexact="blackboard empty").first()
 
     context = {
-        "job_postings": job_postings,
+        "job_postings": job_postings.order_by("-publish_date"),
         "bb_info": bb_info,
         "bb_empty": bb_empty,
     }
diff --git a/fet2020/requirements.txt b/fet2020/requirements.txt
index 41b8c3bb..c65dbbc2 100644
--- a/fet2020/requirements.txt
+++ b/fet2020/requirements.txt
@@ -11,7 +11,6 @@ djangorestframework==3.13.1
 easy-thumbnails==2.8.1
 etherpad-lite==0.5
 fontawesomefree==6.1.1
-ghostscript==0.7
 html2text==2020.1.16
 ldap3==2.9.1
 mysqlclient==2.1.0