diff --git a/src/django_ajax/pagination.py b/src/django_ajax/pagination.py
index 4c15217..3d7159b 100644
--- a/src/django_ajax/pagination.py
+++ b/src/django_ajax/pagination.py
@@ -128,16 +128,19 @@ def paginate(request,
 
     # Page number?
     page_num = request.GET.get(page_variable, None)
+    number_of_pages = paginator.num_pages
 
     if page_num:
         try:
             page_num = int(page_num)
+            page_num = max(page_num, 1) # Make sure page number isn't negative.
+            page_num = min(page_num, number_of_pages) # Make sure the pagenumber isn't bigger than the number of pages.
         except ValueError:
             page_num = 1
     else:
         # Default start page
         if default_to_last_page:
-            page_num = paginator.num_pages
+            page_num = number_of_pages
         else:
             page_num = 1