diff --git a/11.0/apache/Dockerfile b/11.0/apache/Dockerfile
index 7cce7d08..d3dc0c31 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-3.1.5 \
  && docker-php-ext-enable apcu redis memcached
diff --git a/11.0/fpm/Dockerfile b/11.0/fpm/Dockerfile
index 43756d30..7edcc615 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-3.1.5 \
  && docker-php-ext-enable apcu redis memcached
diff --git a/12.0/apache/Dockerfile b/12.0/apache/Dockerfile
index f2937282..1e07b0d2 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-3.1.5 \
  && docker-php-ext-enable apcu redis memcached
diff --git a/12.0/fpm/Dockerfile b/12.0/fpm/Dockerfile
index 5963ba7d..3c3d35b2 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-3.1.5 \
  && docker-php-ext-enable apcu redis memcached
diff --git a/Dockerfile.template b/Dockerfile.template
index 84b45a18..30eaa9c0 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-3.1.5 \
  && docker-php-ext-enable apcu redis memcached