diff --git a/Dockerfile-debian.template b/Dockerfile-debian.template
index cea5d93b..8da9c70d 100644
--- a/Dockerfile-debian.template
+++ b/Dockerfile-debian.template
@@ -20,6 +20,7 @@ RUN set -ex; \
 # see https://docs.nextcloud.com/server/stable/admin_manual/installation/source_installation.html
 ENV PHP_MEMORY_LIMIT 512M
 ENV PHP_UPLOAD_LIMIT 512M
+ENV PHP_OPCACHE_MEMORY_CONSUMTION 128
 RUN set -ex; \
     \
     savedAptMark="$(apt-mark showmanual)"; \
@@ -95,7 +96,7 @@ RUN { \
         echo 'opcache.enable=1'; \
         echo 'opcache.interned_strings_buffer=32'; \
         echo 'opcache.max_accelerated_files=10000'; \
-        echo 'opcache.memory_consumption=128'; \
+        echo 'opcache.memory_consumption=${PHP_OPCACHE_MEMORY_CONSUMTION}'; \
         echo 'opcache.save_comments=1'; \
         echo 'opcache.revalidate_freq=60'; \
         echo 'opcache.jit=1255'; \