diff --git a/lib/github_changelog_generator/fetcher.rb b/lib/github_changelog_generator/fetcher.rb
index f375119..4db61b9 100644
--- a/lib/github_changelog_generator/fetcher.rb
+++ b/lib/github_changelog_generator/fetcher.rb
@@ -71,7 +71,7 @@ module GitHubChangelogGenerator
       response.each_page do |page|
         page_i += PER_PAGE_NUMBER
         print_in_same_line("Fetching tags... #{page_i}/#{count_pages * PER_PAGE_NUMBER}")
-        tags.concat(page)
+        tags.concat(page) unless page.nil?
       end
       print_empty_line