diff --git a/13.0/apache/Dockerfile b/13.0/apache/Dockerfile
index 3b3ef9e9..d36104af 100644
--- a/13.0/apache/Dockerfile
+++ b/13.0/apache/Dockerfile
@@ -24,6 +24,7 @@ RUN set -ex; \
     apt-get update; \
     apt-get install -y --no-install-recommends \
         libcurl4-openssl-dev \
+        libevent-dev \
         libfreetype6-dev \
         libicu-dev \
         libjpeg-dev \
@@ -52,8 +53,8 @@ RUN set -ex; \
     ; \
     \
 # pecl will claim success even if one install fails, so we need to perform each install separately
-    pecl install APCu-5.1.15; \
-    pecl install memcached-3.0.4; \
+    pecl install APCu-5.1.16; \
+    pecl install memcached-3.1.3; \
     pecl install redis-4.2.0; \
     pecl install imagick-3.4.3; \
     \
diff --git a/13.0/fpm-alpine/Dockerfile b/13.0/fpm-alpine/Dockerfile
index 7461ea09..98bc406b 100644
--- a/13.0/fpm-alpine/Dockerfile
+++ b/13.0/fpm-alpine/Dockerfile
@@ -20,6 +20,7 @@ RUN set -ex; \
         autoconf \
         freetype-dev \
         icu-dev \
+        libevent-dev \
         libjpeg-turbo-dev \
         libmcrypt-dev \
         libpng-dev \
@@ -46,8 +47,8 @@ RUN set -ex; \
     ; \
     \
 # pecl will claim success even if one install fails, so we need to perform each install separately
-    pecl install APCu-5.1.15; \
-    pecl install memcached-3.0.4; \
+    pecl install APCu-5.1.16; \
+    pecl install memcached-3.1.3; \
     pecl install redis-4.2.0; \
     pecl install imagick-3.4.3; \
     \
diff --git a/13.0/fpm/Dockerfile b/13.0/fpm/Dockerfile
index 3ea4481e..22f343d8 100644
--- a/13.0/fpm/Dockerfile
+++ b/13.0/fpm/Dockerfile
@@ -24,6 +24,7 @@ RUN set -ex; \
     apt-get update; \
     apt-get install -y --no-install-recommends \
         libcurl4-openssl-dev \
+        libevent-dev \
         libfreetype6-dev \
         libicu-dev \
         libjpeg-dev \
@@ -52,8 +53,8 @@ RUN set -ex; \
     ; \
     \
 # pecl will claim success even if one install fails, so we need to perform each install separately
-    pecl install APCu-5.1.15; \
-    pecl install memcached-3.0.4; \
+    pecl install APCu-5.1.16; \
+    pecl install memcached-3.1.3; \
     pecl install redis-4.2.0; \
     pecl install imagick-3.4.3; \
     \
diff --git a/14.0/apache/Dockerfile b/14.0/apache/Dockerfile
index 5533e2f6..b0bf50c0 100644
--- a/14.0/apache/Dockerfile
+++ b/14.0/apache/Dockerfile
@@ -24,6 +24,7 @@ RUN set -ex; \
     apt-get update; \
     apt-get install -y --no-install-recommends \
         libcurl4-openssl-dev \
+        libevent-dev \
         libfreetype6-dev \
         libicu-dev \
         libjpeg-dev \
@@ -52,8 +53,8 @@ RUN set -ex; \
     ; \
     \
 # pecl will claim success even if one install fails, so we need to perform each install separately
-    pecl install APCu-5.1.15; \
-    pecl install memcached-3.0.4; \
+    pecl install APCu-5.1.16; \
+    pecl install memcached-3.1.3; \
     pecl install redis-4.2.0; \
     pecl install imagick-3.4.3; \
     \
diff --git a/14.0/fpm-alpine/Dockerfile b/14.0/fpm-alpine/Dockerfile
index 66aec993..95cae19e 100644
--- a/14.0/fpm-alpine/Dockerfile
+++ b/14.0/fpm-alpine/Dockerfile
@@ -20,6 +20,7 @@ RUN set -ex; \
         autoconf \
         freetype-dev \
         icu-dev \
+        libevent-dev \
         libjpeg-turbo-dev \
         libmcrypt-dev \
         libpng-dev \
@@ -46,8 +47,8 @@ RUN set -ex; \
     ; \
     \
 # pecl will claim success even if one install fails, so we need to perform each install separately
-    pecl install APCu-5.1.15; \
-    pecl install memcached-3.0.4; \
+    pecl install APCu-5.1.16; \
+    pecl install memcached-3.1.3; \
     pecl install redis-4.2.0; \
     pecl install imagick-3.4.3; \
     \
diff --git a/14.0/fpm/Dockerfile b/14.0/fpm/Dockerfile
index d7b0edb2..7e7cff2c 100644
--- a/14.0/fpm/Dockerfile
+++ b/14.0/fpm/Dockerfile
@@ -24,6 +24,7 @@ RUN set -ex; \
     apt-get update; \
     apt-get install -y --no-install-recommends \
         libcurl4-openssl-dev \
+        libevent-dev \
         libfreetype6-dev \
         libicu-dev \
         libjpeg-dev \
@@ -52,8 +53,8 @@ RUN set -ex; \
     ; \
     \
 # pecl will claim success even if one install fails, so we need to perform each install separately
-    pecl install APCu-5.1.15; \
-    pecl install memcached-3.0.4; \
+    pecl install APCu-5.1.16; \
+    pecl install memcached-3.1.3; \
     pecl install redis-4.2.0; \
     pecl install imagick-3.4.3; \
     \
diff --git a/15.0/apache/Dockerfile b/15.0/apache/Dockerfile
index 7c50375d..5fad6022 100644
--- a/15.0/apache/Dockerfile
+++ b/15.0/apache/Dockerfile
@@ -1,5 +1,5 @@
 # DO NOT EDIT: created by update.sh from Dockerfile-debian.template
-FROM php:7.2-apache-stretch
+FROM php:7.3-apache-stretch
 
 # entrypoint.sh and cron.sh dependencies
 RUN set -ex; \
@@ -24,6 +24,7 @@ RUN set -ex; \
     apt-get update; \
     apt-get install -y --no-install-recommends \
         libcurl4-openssl-dev \
+        libevent-dev \
         libfreetype6-dev \
         libicu-dev \
         libjpeg-dev \
@@ -34,6 +35,7 @@ RUN set -ex; \
         libpq-dev \
         libxml2-dev \
         libmagickwand-dev \
+        libzip-dev \
     ; \
     \
     debMultiarch="$(dpkg-architecture --query DEB_BUILD_MULTIARCH)"; \
@@ -52,8 +54,8 @@ RUN set -ex; \
     ; \
     \
 # pecl will claim success even if one install fails, so we need to perform each install separately
-    pecl install APCu-5.1.15; \
-    pecl install memcached-3.0.4; \
+    pecl install APCu-5.1.16; \
+    pecl install memcached-3.1.3; \
     pecl install redis-4.2.0; \
     pecl install imagick-3.4.3; \
     \
diff --git a/15.0/fpm-alpine/Dockerfile b/15.0/fpm-alpine/Dockerfile
index f71d5f9e..cdc04ec2 100644
--- a/15.0/fpm-alpine/Dockerfile
+++ b/15.0/fpm-alpine/Dockerfile
@@ -1,5 +1,5 @@
 # DO NOT EDIT: created by update.sh from Dockerfile-alpine.template
-FROM php:7.2-fpm-alpine3.8
+FROM php:7.3-fpm-alpine3.8
 
 # entrypoint.sh and cron.sh dependencies
 RUN set -ex; \
@@ -20,11 +20,13 @@ RUN set -ex; \
         autoconf \
         freetype-dev \
         icu-dev \
+        libevent-dev \
         libjpeg-turbo-dev \
         libmcrypt-dev \
         libpng-dev \
         libmemcached-dev \
         libxml2-dev \
+        libzip-dev \
         openldap-dev \
         pcre-dev \
         postgresql-dev \
@@ -46,8 +48,8 @@ RUN set -ex; \
     ; \
     \
 # pecl will claim success even if one install fails, so we need to perform each install separately
-    pecl install APCu-5.1.15; \
-    pecl install memcached-3.0.4; \
+    pecl install APCu-5.1.16; \
+    pecl install memcached-3.1.3; \
     pecl install redis-4.2.0; \
     pecl install imagick-3.4.3; \
     \
diff --git a/15.0/fpm/Dockerfile b/15.0/fpm/Dockerfile
index c8dc904f..59877ab2 100644
--- a/15.0/fpm/Dockerfile
+++ b/15.0/fpm/Dockerfile
@@ -1,5 +1,5 @@
 # DO NOT EDIT: created by update.sh from Dockerfile-debian.template
-FROM php:7.2-fpm-stretch
+FROM php:7.3-fpm-stretch
 
 # entrypoint.sh and cron.sh dependencies
 RUN set -ex; \
@@ -24,6 +24,7 @@ RUN set -ex; \
     apt-get update; \
     apt-get install -y --no-install-recommends \
         libcurl4-openssl-dev \
+        libevent-dev \
         libfreetype6-dev \
         libicu-dev \
         libjpeg-dev \
@@ -34,6 +35,7 @@ RUN set -ex; \
         libpq-dev \
         libxml2-dev \
         libmagickwand-dev \
+        libzip-dev \
     ; \
     \
     debMultiarch="$(dpkg-architecture --query DEB_BUILD_MULTIARCH)"; \
@@ -52,8 +54,8 @@ RUN set -ex; \
     ; \
     \
 # pecl will claim success even if one install fails, so we need to perform each install separately
-    pecl install APCu-5.1.15; \
-    pecl install memcached-3.0.4; \
+    pecl install APCu-5.1.16; \
+    pecl install memcached-3.1.3; \
     pecl install redis-4.2.0; \
     pecl install imagick-3.4.3; \
     \
diff --git a/Dockerfile-alpine.template b/Dockerfile-alpine.template
index 4d282f54..6b92d863 100644
--- a/Dockerfile-alpine.template
+++ b/Dockerfile-alpine.template
@@ -19,11 +19,13 @@ RUN set -ex; \
         autoconf \
         freetype-dev \
         icu-dev \
+        libevent-dev \
         libjpeg-turbo-dev \
         libmcrypt-dev \
         libpng-dev \
         libmemcached-dev \
         libxml2-dev \
+        libzip-dev \
         openldap-dev \
         pcre-dev \
         postgresql-dev \
diff --git a/Dockerfile-debian.template b/Dockerfile-debian.template
index d10ae367..c4c01814 100644
--- a/Dockerfile-debian.template
+++ b/Dockerfile-debian.template
@@ -23,6 +23,7 @@ RUN set -ex; \
     apt-get update; \
     apt-get install -y --no-install-recommends \
         libcurl4-openssl-dev \
+        libevent-dev \
         libfreetype6-dev \
         libicu-dev \
         libjpeg-dev \
@@ -33,6 +34,7 @@ RUN set -ex; \
         libpq-dev \
         libxml2-dev \
         libmagickwand-dev \
+        libzip-dev \
     ; \
     \
     debMultiarch="$(dpkg-architecture --query DEB_BUILD_MULTIARCH)"; \
diff --git a/update.sh b/update.sh
index 8a323635..31dd6182 100755
--- a/update.sh
+++ b/update.sh
@@ -2,8 +2,9 @@
 set -eo pipefail
 
 declare -A php_version=(
-	[default]='7.2'
-	[12.0]='7.1'
+	[default]='7.3'
+	[14.0]='7.2'
+	[13.0]='7.2'
 )
 
 declare -A cmd=(
@@ -25,8 +26,8 @@ declare -A extras=(
 )
 
 declare -A pecl_versions=(
-	[APCu]='5.1.15'
-	[memcached]='3.0.4'
+	[APCu]='5.1.16'
+	[memcached]='3.1.3'
 	[redis]='4.2.0'
 	[imagick]='3.4.3'
 )
@@ -58,6 +59,7 @@ travisEnv=
 
 function create_variant() {
 	dir="$1/$variant"
+	phpVersion=${php_version[$version]-${php_version[default]}}
 
 	# Create the version+variant directory with a Dockerfile.
 	mkdir -p "$dir"
@@ -70,7 +72,7 @@ function create_variant() {
 
 	# Replace the variables.
 	sed -ri -e '
-		s/%%PHP_VERSION%%/'"${php_version[$version]-${php_version[default]}}"'/g;
+		s/%%PHP_VERSION%%/'"$phpVersion"'/g;
 		s/%%VARIANT%%/'"$variant"'/g;
 		s/%%VERSION%%/'"$fullversion"'/g;
 		s/%%BASE_DOWNLOAD_URL%%/'"$2"'/g;
@@ -82,6 +84,12 @@ function create_variant() {
 		s/%%IMAGICK_VERSION%%/'"${pecl_versions[imagick]}"'/g;
 	' "$dir/Dockerfile"
 
+	if [[ "$phpVersion" != 7.3 ]]; then
+		sed -ri \
+			-e '/libzip-dev/d' \
+			"$dir/Dockerfile"
+	fi
+
 	# Copy the shell scripts
 	for name in entrypoint cron; do
 		cp "docker-$name.sh" "$dir/$name.sh"