diff --git a/docker/app/php.ini b/docker/app/php.ini
index 2f8c7eb..d5c2504 100644
--- a/docker/app/php.ini
+++ b/docker/app/php.ini
@@ -4,6 +4,8 @@ session.auto_start = Off
 short_open_tag = Off
 
 # http://symfony.com/doc/current/performance.html
+opcache.interned_strings_buffer = 16
 opcache.max_accelerated_files = 20000
+opcache.memory_consumption = 256
 realpath_cache_size = 4096K
 realpath_cache_ttl = 600