diff --git a/5.4/Dockerfile b/5.4/Dockerfile
index a659e32..9f937f7 100644
--- a/5.4/Dockerfile
+++ b/5.4/Dockerfile
@@ -24,7 +24,7 @@ RUN buildDeps=" \
         libxslt1-dev \
     " \
     && apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y $buildDeps $runtimeDeps \
-    && docker-php-ext-install bcmath bz2 calendar iconv intl mbstring mcrypt mysql mysqli pdo_mysql pdo_pgsql pgsql soap xsl zip \
+    && docker-php-ext-install bcmath bz2 calendar iconv intl mbstring mcrypt mysql mysqli pdo_mysql pdo_pgsql pgsql soap xsl zip sockets \
     && docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/ \
     && docker-php-ext-install gd \
     && docker-php-ext-configure ldap --with-libdir=lib/x86_64-linux-gnu/ \
diff --git a/5.4/apache/Dockerfile b/5.4/apache/Dockerfile
index e5c64e0..0fbe2b3 100644
--- a/5.4/apache/Dockerfile
+++ b/5.4/apache/Dockerfile
@@ -24,7 +24,7 @@ RUN buildDeps=" \
         libxslt1-dev \
     " \
     && apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y $buildDeps $runtimeDeps \
-    && docker-php-ext-install bcmath bz2 calendar iconv intl mbstring mcrypt mysql mysqli pdo_mysql pdo_pgsql pgsql soap xsl zip \
+    && docker-php-ext-install bcmath bz2 calendar iconv intl mbstring mcrypt mysql mysqli pdo_mysql pdo_pgsql pgsql soap xsl zip sockets \
     && docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/ \
     && docker-php-ext-install gd \
     && docker-php-ext-configure ldap --with-libdir=lib/x86_64-linux-gnu/ \
diff --git a/5.4/fpm/Dockerfile b/5.4/fpm/Dockerfile
index 75b7dcd..a3895ae 100644
--- a/5.4/fpm/Dockerfile
+++ b/5.4/fpm/Dockerfile
@@ -24,7 +24,7 @@ RUN buildDeps=" \
         libxslt1-dev \
     " \
     && apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y $buildDeps $runtimeDeps \
-    && docker-php-ext-install bcmath bz2 calendar iconv intl mbstring mcrypt mysql mysqli pdo_mysql pdo_pgsql pgsql soap xsl zip \
+    && docker-php-ext-install bcmath bz2 calendar iconv intl mbstring mcrypt mysql mysqli pdo_mysql pdo_pgsql pgsql soap xsl zip sockets \
     && docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/ \
     && docker-php-ext-install gd \
     && docker-php-ext-configure ldap --with-libdir=lib/x86_64-linux-gnu/ \
diff --git a/5.5/Dockerfile b/5.5/Dockerfile
index 71cacf2..232ad55 100644
--- a/5.5/Dockerfile
+++ b/5.5/Dockerfile
@@ -24,7 +24,7 @@ RUN buildDeps=" \
         libxslt1-dev \
     " \
     && apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y $buildDeps $runtimeDeps \
-    && docker-php-ext-install bcmath bz2 calendar iconv intl mbstring mcrypt mysql mysqli opcache pdo_mysql pdo_pgsql pgsql soap xsl zip \
+    && docker-php-ext-install bcmath bz2 calendar iconv intl mbstring mcrypt mysql mysqli opcache pdo_mysql pdo_pgsql pgsql soap xsl zip sockets \
     && docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/ \
     && docker-php-ext-install gd \
     && docker-php-ext-configure ldap --with-libdir=lib/x86_64-linux-gnu/ \
diff --git a/5.5/apache/Dockerfile b/5.5/apache/Dockerfile
index 8a05ea6..f19ee4f 100644
--- a/5.5/apache/Dockerfile
+++ b/5.5/apache/Dockerfile
@@ -24,7 +24,7 @@ RUN buildDeps=" \
         libxslt1-dev \
     " \
     && apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y $buildDeps $runtimeDeps \
-    && docker-php-ext-install bcmath bz2 calendar iconv intl mbstring mcrypt mysql mysqli opcache pdo_mysql pdo_pgsql pgsql soap xsl zip \
+    && docker-php-ext-install bcmath bz2 calendar iconv intl mbstring mcrypt mysql mysqli opcache pdo_mysql pdo_pgsql pgsql soap xsl zip sockets \
     && docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/ \
     && docker-php-ext-install gd \
     && docker-php-ext-configure ldap --with-libdir=lib/x86_64-linux-gnu/ \
diff --git a/5.5/fpm/Dockerfile b/5.5/fpm/Dockerfile
index 383e5cd..ac7202e 100644
--- a/5.5/fpm/Dockerfile
+++ b/5.5/fpm/Dockerfile
@@ -24,7 +24,7 @@ RUN buildDeps=" \
         libxslt1-dev \
     " \
     && apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y $buildDeps $runtimeDeps \
-    && docker-php-ext-install bcmath bz2 calendar iconv intl mbstring mcrypt mysql mysqli opcache pdo_mysql pdo_pgsql pgsql soap xsl zip \
+    && docker-php-ext-install bcmath bz2 calendar iconv intl mbstring mcrypt mysql mysqli opcache pdo_mysql pdo_pgsql pgsql soap xsl zip sockets \
     && docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/ \
     && docker-php-ext-install gd \
     && docker-php-ext-configure ldap --with-libdir=lib/x86_64-linux-gnu/ \
diff --git a/5.6/Dockerfile b/5.6/Dockerfile
index 059be03..c99e069 100644
--- a/5.6/Dockerfile
+++ b/5.6/Dockerfile
@@ -30,7 +30,8 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update -q \
       redis \
       soap \
       xsl \
-      zip
+      zip \
+      sockets
 # already installed:
 #      iconv \
 #      mbstring \
diff --git a/5.6/apache/Dockerfile b/5.6/apache/Dockerfile
index fc6ef6c..fd1f62d 100644
--- a/5.6/apache/Dockerfile
+++ b/5.6/apache/Dockerfile
@@ -31,6 +31,7 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update -q \
       soap \
       xsl \
       zip \
+      sockets \
 # already installed:
 #      iconv \
 #      mbstring \
diff --git a/5.6/fpm/Dockerfile b/5.6/fpm/Dockerfile
index 57cfa7c..fbeabae 100644
--- a/5.6/fpm/Dockerfile
+++ b/5.6/fpm/Dockerfile
@@ -30,7 +30,8 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update -q \
       redis \
       soap \
       xsl \
-      zip
+      zip \
+      sockets
 # already installed:
 #      iconv \
 #      mbstring \
diff --git a/7.0/Dockerfile b/7.0/Dockerfile
index 6fbbda4..856c1bb 100644
--- a/7.0/Dockerfile
+++ b/7.0/Dockerfile
@@ -29,7 +29,8 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update -q \
       redis \
       soap \
       xsl \
-      zip
+      zip \
+      sockets
 # already installed:
 #      iconv \
 #      mbstring \
diff --git a/7.0/apache/Dockerfile b/7.0/apache/Dockerfile
index 909ba21..39728f9 100644
--- a/7.0/apache/Dockerfile
+++ b/7.0/apache/Dockerfile
@@ -30,6 +30,7 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update -q \
       soap \
       xsl \
       zip \
+      sockets \
 # already installed:
 #      iconv \
 #      mbstring \
diff --git a/7.0/fpm/Dockerfile b/7.0/fpm/Dockerfile
index 8321c96..658a6ff 100644
--- a/7.0/fpm/Dockerfile
+++ b/7.0/fpm/Dockerfile
@@ -29,7 +29,8 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update -q \
       redis \
       soap \
       xsl \
-      zip
+      zip \
+      sockets
 # already installed:
 #      iconv \
 #      mbstring \
diff --git a/7.1/Dockerfile b/7.1/Dockerfile
index 4e698a3..9f1460e 100644
--- a/7.1/Dockerfile
+++ b/7.1/Dockerfile
@@ -29,7 +29,8 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update -q \
       redis \
       soap \
       xsl \
-      zip
+      zip \
+      sockets
 # already installed:
 #      iconv \
 #      mbstring \
diff --git a/7.1/apache/Dockerfile b/7.1/apache/Dockerfile
index 863aa08..9615de9 100644
--- a/7.1/apache/Dockerfile
+++ b/7.1/apache/Dockerfile
@@ -30,6 +30,7 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update -q \
       soap \
       xsl \
       zip \
+      sockets \
 # already installed:
 #      iconv \
 #      mbstring \
diff --git a/7.1/fpm/Dockerfile b/7.1/fpm/Dockerfile
index 208eb1b..4f1e630 100644
--- a/7.1/fpm/Dockerfile
+++ b/7.1/fpm/Dockerfile
@@ -29,7 +29,8 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update -q \
       redis \
       soap \
       xsl \
-      zip
+      zip \
+      sockets
 # already installed:
 #      iconv \
 #      mbstring \
diff --git a/7.2/Dockerfile b/7.2/Dockerfile
index 6753a5d..d5f92d8 100644
--- a/7.2/Dockerfile
+++ b/7.2/Dockerfile
@@ -28,7 +28,8 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update -q \
       redis \
       soap \
       xsl \
-      zip
+      zip \
+      sockets
 # already installed:
 #      iconv \
 #      mbstring \
diff --git a/7.2/apache/Dockerfile b/7.2/apache/Dockerfile
index f9dda2f..32d5cc9 100644
--- a/7.2/apache/Dockerfile
+++ b/7.2/apache/Dockerfile
@@ -29,6 +29,7 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update -q \
       soap \
       xsl \
       zip \
+      sockets \
 # already installed:
 #      iconv \
 #      mbstring \
diff --git a/7.2/fpm/Dockerfile b/7.2/fpm/Dockerfile
index fca2086..1053d28 100644
--- a/7.2/fpm/Dockerfile
+++ b/7.2/fpm/Dockerfile
@@ -28,7 +28,8 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update -q \
       redis \
       soap \
       xsl \
-      zip
+      zip \
+      sockets
 # already installed:
 #      iconv \
 #      mbstring \
diff --git a/7.3/Dockerfile b/7.3/Dockerfile
index 7c16466..aaca578 100644
--- a/7.3/Dockerfile
+++ b/7.3/Dockerfile
@@ -28,7 +28,8 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update -q \
       redis \
       soap \
       xsl \
-      zip
+      zip \
+      sockets
 # already installed:
 #      iconv \
 #      mbstring \
diff --git a/7.3/apache/Dockerfile b/7.3/apache/Dockerfile
index 8f757e8..6f7c6a8 100644
--- a/7.3/apache/Dockerfile
+++ b/7.3/apache/Dockerfile
@@ -29,6 +29,7 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update -q \
       soap \
       xsl \
       zip \
+      sockets \
 # already installed:
 #      iconv \
 #      mbstring \
diff --git a/7.3/fpm/Dockerfile b/7.3/fpm/Dockerfile
index 88a2baa..619be4d 100644
--- a/7.3/fpm/Dockerfile
+++ b/7.3/fpm/Dockerfile
@@ -28,7 +28,8 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update -q \
       redis \
       soap \
       xsl \
-      zip
+      zip \
+      sockets
 # already installed:
 #      iconv \
 #      mbstring \
diff --git a/7.4/Dockerfile b/7.4/Dockerfile
index b6c6f8f..ae72380 100644
--- a/7.4/Dockerfile
+++ b/7.4/Dockerfile
@@ -28,7 +28,8 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update -q \
       redis \
       soap \
       xsl \
-      zip
+      zip \
+      sockets
 # already installed:
 #      iconv \
 #      mbstring \
diff --git a/7.4/apache/Dockerfile b/7.4/apache/Dockerfile
index b72affb..2b5a11b 100644
--- a/7.4/apache/Dockerfile
+++ b/7.4/apache/Dockerfile
@@ -29,6 +29,7 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update -q \
       soap \
       xsl \
       zip \
+      sockets \
 # already installed:
 #      iconv \
 #      mbstring \
diff --git a/7.4/fpm/Dockerfile b/7.4/fpm/Dockerfile
index 9cf13ea..c93ca9e 100644
--- a/7.4/fpm/Dockerfile
+++ b/7.4/fpm/Dockerfile
@@ -28,7 +28,8 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update -q \
       redis \
       soap \
       xsl \
-      zip
+      zip \
+      sockets
 # already installed:
 #      iconv \
 #      mbstring \
diff --git a/Dockerfile b/Dockerfile
index 0cf5c5a..f77bca4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -28,7 +28,8 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update -q \
       redis \
       soap \
       xsl \
-      zip
+      zip \
+      sockets
 # already installed:
 #      iconv \
 #      mbstring \
diff --git a/Makefile b/Makefile
index 9617373..e059051 100644
--- a/Makefile
+++ b/Makefile
@@ -25,9 +25,10 @@ EXTENSIONS := \
 	pdo_pgsql \
 	pgsql \
 	redis \
-    soap \
-    xsl \
-    zip
+	soap \
+	xsl \
+	zip \
+	sockets
 ifeq (,$(findstring $(PHP_VERSION), 7.2 7.3 7.4 latest))
 	# Add more extensions to PHP < 7.2.
 	EXTENSIONS += mcrypt
diff --git a/README.md b/README.md
index 8dfc5de..a7950f1 100644
--- a/README.md
+++ b/README.md
@@ -78,6 +78,7 @@ in addition to those you can already find in the [official PHP image](https://hu
 - `xsl`
 - `Zend OPcache`
 - `zip`
+- `sockets`
 
 You will probably not need all this stuff. Even if having some extra extensions loaded ain't a big issue in most cases, you will very likely want to checkout this repository, remove unwanted extensions from the `Dockerfile`, and build your own image — for sometimes removing is easier than adding. 😉
 
diff --git a/dev/Makefile b/dev/Makefile
index a4fb347..2ebef98 100644
--- a/dev/Makefile
+++ b/dev/Makefile
@@ -27,7 +27,8 @@ EXTENSIONS := \
 	redis \
 	soap \
 	Xdebug \
-	zip
+	zip \
+	sockets
 ifeq (,$(findstring $(PHP_VERSION), 7.2 7.3 7.4 latest))
 	# Add more extensions to PHP < 7.2.
 	EXTENSIONS += mcrypt