diff --git a/11.0/apache/Dockerfile b/11.0/apache/Dockerfile
index 57c0a7c..e591916 100644
--- a/11.0/apache/Dockerfile
+++ b/11.0/apache/Dockerfile
@@ -36,7 +36,7 @@ RUN a2enmod rewrite
 
 # PECL extensions
 RUN set -ex \
- && pecl install APCu-5.1.8 \
+ && pecl install APCu-5.1.9 \
  && pecl install memcached-3.0.4 \
  && pecl install redis-3.1.6 \
  && docker-php-ext-enable apcu redis memcached
diff --git a/11.0/fpm/Dockerfile b/11.0/fpm/Dockerfile
index 0c2efdb..79c928c 100644
--- a/11.0/fpm/Dockerfile
+++ b/11.0/fpm/Dockerfile
@@ -35,7 +35,7 @@ RUN { \
 
 # PECL extensions
 RUN set -ex \
- && pecl install APCu-5.1.8 \
+ && pecl install APCu-5.1.9 \
  && pecl install memcached-3.0.4 \
  && pecl install redis-3.1.6 \
  && docker-php-ext-enable apcu redis memcached
diff --git a/12.0/apache/Dockerfile b/12.0/apache/Dockerfile
index a901b0e..91b7bad 100644
--- a/12.0/apache/Dockerfile
+++ b/12.0/apache/Dockerfile
@@ -36,7 +36,7 @@ RUN a2enmod rewrite
 
 # PECL extensions
 RUN set -ex \
- && pecl install APCu-5.1.8 \
+ && pecl install APCu-5.1.9 \
  && pecl install memcached-3.0.4 \
  && pecl install redis-3.1.6 \
  && docker-php-ext-enable apcu redis memcached
diff --git a/12.0/fpm/Dockerfile b/12.0/fpm/Dockerfile
index 19cb5b2..0b7f23f 100644
--- a/12.0/fpm/Dockerfile
+++ b/12.0/fpm/Dockerfile
@@ -35,7 +35,7 @@ RUN { \
 
 # PECL extensions
 RUN set -ex \
- && pecl install APCu-5.1.8 \
+ && pecl install APCu-5.1.9 \
  && pecl install memcached-3.0.4 \
  && pecl install redis-3.1.6 \
  && docker-php-ext-enable apcu redis memcached
diff --git a/Dockerfile.template b/Dockerfile.template
index 0a1d142..0ec6bf3 100644
--- a/Dockerfile.template
+++ b/Dockerfile.template
@@ -36,7 +36,7 @@ RUN a2enmod rewrite
 
 # PECL extensions
 RUN set -ex \
- && pecl install APCu-5.1.8 \
+ && pecl install APCu-5.1.9 \
  && pecl install memcached-3.0.4 \
  && pecl install redis-3.1.6 \
  && docker-php-ext-enable apcu redis memcached