diff --git a/layerindex/models.py b/layerindex/models.py
index 4c4d951..1ee2bbd 100644
--- a/layerindex/models.py
+++ b/layerindex/models.py
@@ -248,24 +248,24 @@ class LayerNote(models.Model):
 
 class Recipe(models.Model):
     layerbranch = models.ForeignKey(LayerBranch)
-    filename = models.CharField(max_length=255)
-    filepath = models.CharField(max_length=255, blank=True)
-    pn = models.CharField(max_length=100, blank=True)
-    pv = models.CharField(max_length=100, blank=True)
-    summary = models.CharField(max_length=255, blank=True)
+    filename = models.CharField(max_length=511)
+    filepath = models.CharField(max_length=511, blank=True)
+    pn = models.CharField(max_length=255, blank=True)
+    pv = models.CharField(max_length=255, blank=True)
+    summary = models.CharField(max_length=511, blank=True)
     description = models.TextField(blank=True)
-    section = models.CharField(max_length=255, blank=True)
+    section = models.CharField(max_length=511, blank=True)
     license = models.CharField(max_length=2048, blank=True)
     homepage = models.URLField(blank=True)
     bugtracker = models.URLField(blank=True)
     provides = models.CharField(max_length=2048, blank=True)
-    bbclassextend = models.CharField(max_length=255, blank=True)
-    src_uri = models.CharField(max_length=255, blank=True)
+    bbclassextend = models.CharField(max_length=511, blank=True)
+    src_uri = models.CharField(max_length=511, blank=True)
     depends = models.TextField(blank=True)
-    inherits = models.CharField(max_length=255, blank=True)
+    inherits = models.CharField(max_length=511, blank=True)
 
     updated = models.DateTimeField(auto_now = True)
-    blacklisted = models.CharField(max_length=255, blank=True)
+    blacklisted = models.CharField(max_length=511, blank=True)
 
     def vcs_web_url(self):
         url = self.layerbranch.file_url(os.path.join(self.filepath, self.filename))