diff --git a/Dockerfile b/Dockerfile
index dd82831..78ef0dc 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -106,6 +106,7 @@ ARG GID
 ENV UPLOAD_MAX_SIZE=10G \
     APC_SHM_SIZE=128M \
     OPCACHE_MEM_SIZE=128 \
+    OPCACHE_STRING_BUFFER_SIZE=16 \
     MEMORY_LIMIT=512M \
     CRON_PERIOD=5m \
     CRON_MEMORY_LIMIT=1g \
diff --git a/README.md b/README.md
index 8ba8207..51a1209 100644
--- a/README.md
+++ b/README.md
@@ -91,17 +91,18 @@ For convenience they were put at [the very top of the Dockerfile](https://github
 
 ### Runtime
 
-|          Variable         |         Description         |       Default      |
-| ------------------------- | --------------------------- | ------------------ |
-|     **UPLOAD_MAX_SIZE**   | file upload maximum size    |         10G        |
-|      **APC_SHM_SIZE**     | apc shared memory size      |         128M       |
-|    **OPCACHE_MEM_SIZE**   | opcache available memory    |         128M       |
-|      **MEMORY_LIMIT**     | max php command mem usage   |         512M       |
-|       **CRON_PERIOD**     | cron time interval (min.)   |         5m         |
-|   **CRON_MEMORY_LIMIT**   | cron max memory usage       |         1G         |
-|         **DB_TYPE**       | sqlite3, mysql, pgsql       |       sqlite3      |
-|         **DOMAIN**        | host domain                 |      localhost     |
-|      **PHP_HARDENING**    | enables snuffleupagus       |        true        |
+|          Variable                 |         Description         |       Default      |
+| --------------------------------- | --------------------------- | ------------------ |
+|     **UPLOAD_MAX_SIZE**           | file upload maximum size    |         10G        |
+|      **APC_SHM_SIZE**             | apc shared memory size      |         128M       |
+|    **OPCACHE_MEM_SIZE**           | opcache available memory    |         128M       |
+|    **OPCACHE_STRING_BUFFER_SIZE** | opcache string buffer size  |         16M        |
+|      **MEMORY_LIMIT**             | max php command mem usage   |         512M       |
+|       **CRON_PERIOD**             | cron time interval (min.)   |         5m         |
+|   **CRON_MEMORY_LIMIT**           | cron max memory usage       |         1G         |
+|         **DB_TYPE**               | sqlite3, mysql, pgsql       |       sqlite3      |
+|         **DOMAIN**                | host domain                 |      localhost     |
+|      **PHP_HARDENING**            | enables snuffleupagus       |        true        |
 
 Leave them at default if you're not sure what you're doing.
 
diff --git a/rootfs/usr/local/bin/run.sh b/rootfs/usr/local/bin/run.sh
index 45a15ed..64a0bd2 100644
--- a/rootfs/usr/local/bin/run.sh
+++ b/rootfs/usr/local/bin/run.sh
@@ -3,6 +3,7 @@
 # Apply environment variables settings
 sed -i -e "s/<APC_SHM_SIZE>/$APC_SHM_SIZE/g" /usr/local/etc/php/conf.d/apcu.ini \
        -e "s/<OPCACHE_MEM_SIZE>/$OPCACHE_MEM_SIZE/g" /usr/local/etc/php/conf.d/docker-php-ext-opcache.ini \
+       -e "s/<OPCACHE_STRING_BUFFER_SIZE>/$OPCACHE_STRING_BUFFER_SIZE/g" /usr/local/etc/php/conf.d/docker-php-ext-opcache.ini \
        -e "s/<CRON_MEMORY_LIMIT>/$CRON_MEMORY_LIMIT/g" /etc/s6.d/cron/run \
        -e "s/<CRON_PERIOD>/$CRON_PERIOD/g" /etc/s6.d/cron/run \
        -e "s/<MEMORY_LIMIT>/$MEMORY_LIMIT/g" /usr/local/bin/occ \
diff --git a/rootfs/usr/local/etc/php/conf.d/docker-php-ext-opcache.ini b/rootfs/usr/local/etc/php/conf.d/docker-php-ext-opcache.ini
index c855e11..5d06c65 100644
--- a/rootfs/usr/local/etc/php/conf.d/docker-php-ext-opcache.ini
+++ b/rootfs/usr/local/etc/php/conf.d/docker-php-ext-opcache.ini
@@ -3,7 +3,7 @@ opcache.enable=1
 opcache.enable_cli=1
 opcache.fast_shutdown=1
 opcache.memory_consumption=<OPCACHE_MEM_SIZE>
-opcache.interned_strings_buffer=16
+opcache.interned_strings_buffer=<OPCACHE_STRING_BUFFER_SIZE>
 opcache.max_accelerated_files=10000
 opcache.revalidate_freq=60
 opcache.jit=disable