diff --git a/src/newsreader/news/core/admin.py b/src/newsreader/news/core/admin.py
index 3bcfc19..e8c3c4b 100644
--- a/src/newsreader/news/core/admin.py
+++ b/src/newsreader/news/core/admin.py
@@ -1,21 +1,35 @@
 from django.contrib import admin
+from django.db import models
+from django.forms import Textarea, TextInput, URLInput
 
 from newsreader.news.core.models import Category, Post
 
 
 class PostAdmin(admin.ModelAdmin):
-    list_display = ("publication_date", "author", "rule", "title")
+    list_display = ("publication_date", "rule", "title")
     list_display_links = ("title",)
     list_filter = ("rule",)
 
     ordering = ("-publication_date", "title")
 
-    fields = ("title", "body", "author", "publication_date", "url")
+    fields = (
+        "remote_identifier",
+        "rule",
+        "url",
+        "title",
+        "body",
+        "publication_date",
+        "author",
+    )
 
-    search_fields = ["title"]
+    readonly_fields = ("remote_identifier", "rule")
+    search_fields = ("title", "author", "rule__name")
 
-    def rule(self, obj):
-        return obj.rule
+    formfield_overrides = {
+        models.CharField: {"widget": TextInput(attrs={"size": "100"})},
+        models.URLField: {"widget": URLInput(attrs={"size": "100"})},
+        models.TextField: {"widget": Textarea(attrs={"rows": 10, "cols": 100})},
+    }
 
 
 class CategoryAdmin(admin.ModelAdmin):