diff --git a/10.0/apache/Dockerfile b/10.0/apache/Dockerfile
index 0135c4b..b7dbd85 100644
--- a/10.0/apache/Dockerfile
+++ b/10.0/apache/Dockerfile
@@ -33,7 +33,7 @@ RUN a2enmod rewrite
 
 # PECL extensions
 RUN set -ex \
- && pecl install APCu-4.0.10 \
+ && pecl install APCu-5.1.8 \
  && pecl install memcached-3.0.2 \
  && pecl install redis-2.2.8 \
  && docker-php-ext-enable apcu redis memcached
diff --git a/10.0/fpm/Dockerfile b/10.0/fpm/Dockerfile
index cbf91e5..e8fd32c 100644
--- a/10.0/fpm/Dockerfile
+++ b/10.0/fpm/Dockerfile
@@ -32,7 +32,7 @@ RUN { \
 
 # PECL extensions
 RUN set -ex \
- && pecl install APCu-4.0.10 \
+ && pecl install APCu-5.1.8 \
  && pecl install memcached-3.0.2 \
  && pecl install redis-2.2.8 \
  && docker-php-ext-enable apcu redis memcached
diff --git a/11.0/apache/Dockerfile b/11.0/apache/Dockerfile
index 3b6ba64..a780008 100644
--- a/11.0/apache/Dockerfile
+++ b/11.0/apache/Dockerfile
@@ -33,7 +33,7 @@ RUN a2enmod rewrite
 
 # PECL extensions
 RUN set -ex \
- && pecl install APCu-4.0.10 \
+ && pecl install APCu-5.1.8 \
  && pecl install memcached-3.0.2 \
  && pecl install redis-2.2.8 \
  && docker-php-ext-enable apcu redis memcached
diff --git a/11.0/fpm/Dockerfile b/11.0/fpm/Dockerfile
index bf9ab18..670fe8f 100644
--- a/11.0/fpm/Dockerfile
+++ b/11.0/fpm/Dockerfile
@@ -32,7 +32,7 @@ RUN { \
 
 # PECL extensions
 RUN set -ex \
- && pecl install APCu-4.0.10 \
+ && pecl install APCu-5.1.8 \
  && pecl install memcached-3.0.2 \
  && pecl install redis-2.2.8 \
  && docker-php-ext-enable apcu redis memcached
diff --git a/9.0/apache/Dockerfile b/9.0/apache/Dockerfile
index 5579b8c..f4c2909 100644
--- a/9.0/apache/Dockerfile
+++ b/9.0/apache/Dockerfile
@@ -33,7 +33,7 @@ RUN a2enmod rewrite
 
 # PECL extensions
 RUN set -ex \
- && pecl install APCu-4.0.10 \
+ && pecl install APCu-5.1.8 \
  && pecl install memcached-3.0.2 \
  && pecl install redis-2.2.8 \
  && docker-php-ext-enable apcu redis memcached
diff --git a/9.0/fpm/Dockerfile b/9.0/fpm/Dockerfile
index 16fa524..c0e7683 100644
--- a/9.0/fpm/Dockerfile
+++ b/9.0/fpm/Dockerfile
@@ -32,7 +32,7 @@ RUN { \
 
 # PECL extensions
 RUN set -ex \
- && pecl install APCu-4.0.10 \
+ && pecl install APCu-5.1.8 \
  && pecl install memcached-3.0.2 \
  && pecl install redis-2.2.8 \
  && docker-php-ext-enable apcu redis memcached
diff --git a/Dockerfile.template b/Dockerfile.template
index 94d1eab..a796225 100644
--- a/Dockerfile.template
+++ b/Dockerfile.template
@@ -33,7 +33,7 @@ RUN a2enmod rewrite
 
 # PECL extensions
 RUN set -ex \
- && pecl install APCu-4.0.10 \
+ && pecl install APCu-5.1.8 \
  && pecl install memcached-3.0.2 \
  && pecl install redis-2.2.8 \
  && docker-php-ext-enable apcu redis memcached