diff --git a/Dockerfile b/Dockerfile
index d60d0893..19e23c02 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -79,7 +79,7 @@ RUN \
   echo 'apc.enable_cli=1' >> /etc/php7/conf.d/apcu.ini && \
   sed -i \
     -e 's/;opcache.enable.*=.*/opcache.enable=1/g' \
-    -e 's/;opcache.interned_strings_buffer.*=.*/opcache.interned_strings_buffer=8/g' \
+    -e 's/;opcache.interned_strings_buffer.*=.*/opcache.interned_strings_buffer=16/g' \
     -e 's/;opcache.max_accelerated_files.*=.*/opcache.max_accelerated_files=10000/g' \
     -e 's/;opcache.memory_consumption.*=.*/opcache.memory_consumption=128/g' \
     -e 's/;opcache.save_comments.*=.*/opcache.save_comments=1/g' \
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index 67e864fe..d0573451 100644
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -79,7 +79,7 @@ RUN \
   echo 'apc.enable_cli=1' >> /etc/php7/conf.d/apcu.ini && \
   sed -i \
     -e 's/;opcache.enable.*=.*/opcache.enable=1/g' \
-    -e 's/;opcache.interned_strings_buffer.*=.*/opcache.interned_strings_buffer=8/g' \
+    -e 's/;opcache.interned_strings_buffer.*=.*/opcache.interned_strings_buffer=16/g' \
     -e 's/;opcache.max_accelerated_files.*=.*/opcache.max_accelerated_files=10000/g' \
     -e 's/;opcache.memory_consumption.*=.*/opcache.memory_consumption=128/g' \
     -e 's/;opcache.save_comments.*=.*/opcache.save_comments=1/g' \
diff --git a/Dockerfile.armhf b/Dockerfile.armhf
index 50234e40..c6defe33 100644
--- a/Dockerfile.armhf
+++ b/Dockerfile.armhf
@@ -79,7 +79,7 @@ RUN \
   echo 'apc.enable_cli=1' >> /etc/php7/conf.d/apcu.ini && \
   sed -i \
     -e 's/;opcache.enable.*=.*/opcache.enable=1/g' \
-    -e 's/;opcache.interned_strings_buffer.*=.*/opcache.interned_strings_buffer=8/g' \
+    -e 's/;opcache.interned_strings_buffer.*=.*/opcache.interned_strings_buffer=16/g' \
     -e 's/;opcache.max_accelerated_files.*=.*/opcache.max_accelerated_files=10000/g' \
     -e 's/;opcache.memory_consumption.*=.*/opcache.memory_consumption=128/g' \
     -e 's/;opcache.save_comments.*=.*/opcache.save_comments=1/g' \
diff --git a/readme-vars.yml b/readme-vars.yml
index 37ea9c80..d8a07037 100644
--- a/readme-vars.yml
+++ b/readme-vars.yml
@@ -78,7 +78,8 @@ app_setup_block: |
 
 # changelog
 changelogs:
-  - { date: "14.04.21:", desc: "Nginx default site config updated for v23 (existing users should delete `/config/nginx/site-confs/default` and restart the container). Fix LDAP connection." }
+  - { date: "28.04.22:", desc: "Increase OPCache interned strings buffered setting to 16." }
+  - { date: "14.04.22:", desc: "Nginx default site config updated for v23 (existing users should delete `/config/nginx/site-confs/default` and restart the container). Fix LDAP connection." }
   - { date: "11.09.21:", desc: "Rebasing to alpine 3.14" }
   - { date: "21.03.21:", desc: "Publish `php8` tag for testing." }
   - { date: "25.02.21:", desc: "Nginx default site config updated for v21 (existing users should delete `/config/nginx/site-confs/default` and restart the container)." }