diff --git a/mainsite/views.py b/mainsite/views.py
index a7a83e4..2c25770 100644
--- a/mainsite/views.py
+++ b/mainsite/views.py
@@ -1,8 +1,10 @@
 # from django.shortcuts import render
 from django.views.generic import TemplateView
-from mainsite.models import Publication
 from django.http import Http404
-from datetime import datetime
+
+from datetime import date
+
+from mainsite.models import Publication
 
 
 class YearView(TemplateView):
@@ -11,12 +13,17 @@ class YearView(TemplateView):
 
     def get_context_data(self, year, nYear, **kwargs):
         context = super(YearView, self).get_context_data(**kwargs)
+
+        try:
+            year, nYear = int(year), int(nYear)
+        except ValueError:
+            raise Http404
         if year + 1 != nYear:
             raise Http404
 
         publications = Publication.objects.filter(
-            date__ge=datetime(year, 8, 1),
-            date__lt=datetime(nYear, 8, 1))
+            date__gte=date(year, 8, 1),
+            date__lt=date(nYear, 8, 1))
         if len(publications) == 0:
             raise Http404
         context['publications'] = publications