diff --git a/lib/fog/dnsimple/dns.rb b/lib/fog/dnsimple/dns.rb
index e47ea5a2f..6eb00cd2a 100644
--- a/lib/fog/dnsimple/dns.rb
+++ b/lib/fog/dnsimple/dns.rb
@@ -80,7 +80,7 @@ module Fog
         def request(params)
           params[:headers] ||= {}
           key = "#{@dnsimple_email}:#{@dnsimple_password}"
-          params[:headers].merge!({ "Authorization" => "Basic " + Base64.encode64(key).chomp,
+          params[:headers].merge!({ "Authorization" => "Basic " + Base64.strict_encode64(key).chomp,
                                     "Accept" => "application/json",
                                     "Content-Type" => "application/json" })