diff --git a/example/upgrade_server.rb b/example/upgrade_server.rb
index d7619d53..40bcad49 100644
--- a/example/upgrade_server.rb
+++ b/example/upgrade_server.rb
@@ -2,7 +2,6 @@
 
 require_relative 'helper'
 require 'http_parser'
-require 'base64'
 
 options = { port: 8080 }
 OptionParser.new do |opts|
diff --git a/lib/http/2/server.rb b/lib/http/2/server.rb
index bb22bfb1..e2b89992 100644
--- a/lib/http/2/server.rb
+++ b/lib/http/2/server.rb
@@ -1,3 +1,4 @@
+require 'base64'
 module HTTP2
   # HTTP 2.0 server connection class that implements appropriate header
   # compression / decompression algorithms and stream management logic.