diff --git a/app/lib/request.rb b/app/lib/request.rb
index adc9a48f3dd..e5a9476a8ea 100644
--- a/app/lib/request.rb
+++ b/app/lib/request.rb
@@ -346,7 +346,7 @@ class Request
       end
 
       def private_address_exceptions
-        @private_address_exceptions = (ENV['ALLOWED_PRIVATE_ADDRESSES'] || '').split(',').map { |addr| IPAddr.new(addr) }
+        @private_address_exceptions = (ENV['ALLOWED_PRIVATE_ADDRESSES'] || '').split(/(?:\s*,\s*|\s+)/).map { |addr| IPAddr.new(addr) }
       end
     end
   end