diff --git a/5.6/apache/Dockerfile b/5.6/apache/Dockerfile
index e3b2774..aa0d6ed 100644
--- a/5.6/apache/Dockerfile
+++ b/5.6/apache/Dockerfile
@@ -16,3 +16,7 @@ RUN apt-get update \
     # Cleanup to keep the images size small
     && apt-get autoremove -y \
     && rm -r /var/lib/apt/lists/*
+
+# Install composer
+COPY install-composer /install-composer
+RUN /install-composer && rm /install-composer
diff --git a/5.6/apache/install-composer b/5.6/apache/install-composer
new file mode 100755
index 0000000..f7d34be
--- /dev/null
+++ b/5.6/apache/install-composer
@@ -0,0 +1,17 @@
+#!/bin/sh
+
+EXPECTED_SIGNATURE=$(curl https://composer.github.io/installer.sig)
+php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
+ACTUAL_SIGNATURE=$(php -r "echo hash_file('SHA384', 'composer-setup.php');")
+
+if [ "$EXPECTED_SIGNATURE" != "$ACTUAL_SIGNATURE" ]
+then
+    >&2 echo 'ERROR: Invalid installer signature'
+    rm composer-setup.php
+    exit 1
+fi
+
+php composer-setup.php --install-dir=/usr/bin --filename=composer
+RESULT=$?
+rm composer-setup.php
+exit $RESULT
diff --git a/5.6/fpm/Dockerfile b/5.6/fpm/Dockerfile
index 3491022..645ae1a 100644
--- a/5.6/fpm/Dockerfile
+++ b/5.6/fpm/Dockerfile
@@ -16,3 +16,7 @@ RUN apt-get update \
     # Cleanup to keep the images size small
     && apt-get autoremove -y \
     && rm -r /var/lib/apt/lists/*
+
+# Install composer
+COPY install-composer /install-composer
+RUN /install-composer && rm /install-composer
diff --git a/5.6/fpm/install-composer b/5.6/fpm/install-composer
new file mode 100755
index 0000000..f7d34be
--- /dev/null
+++ b/5.6/fpm/install-composer
@@ -0,0 +1,17 @@
+#!/bin/sh
+
+EXPECTED_SIGNATURE=$(curl https://composer.github.io/installer.sig)
+php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
+ACTUAL_SIGNATURE=$(php -r "echo hash_file('SHA384', 'composer-setup.php');")
+
+if [ "$EXPECTED_SIGNATURE" != "$ACTUAL_SIGNATURE" ]
+then
+    >&2 echo 'ERROR: Invalid installer signature'
+    rm composer-setup.php
+    exit 1
+fi
+
+php composer-setup.php --install-dir=/usr/bin --filename=composer
+RESULT=$?
+rm composer-setup.php
+exit $RESULT
diff --git a/7.0/apache/Dockerfile b/7.0/apache/Dockerfile
index 02f507d..c24e185 100644
--- a/7.0/apache/Dockerfile
+++ b/7.0/apache/Dockerfile
@@ -16,3 +16,7 @@ RUN apt-get update \
     # Cleanup to keep the images size small
     && apt-get autoremove -y \
     && rm -r /var/lib/apt/lists/*
+
+# Install composer
+COPY install-composer /install-composer
+RUN /install-composer && rm /install-composer
diff --git a/7.0/apache/install-composer b/7.0/apache/install-composer
new file mode 100755
index 0000000..f7d34be
--- /dev/null
+++ b/7.0/apache/install-composer
@@ -0,0 +1,17 @@
+#!/bin/sh
+
+EXPECTED_SIGNATURE=$(curl https://composer.github.io/installer.sig)
+php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
+ACTUAL_SIGNATURE=$(php -r "echo hash_file('SHA384', 'composer-setup.php');")
+
+if [ "$EXPECTED_SIGNATURE" != "$ACTUAL_SIGNATURE" ]
+then
+    >&2 echo 'ERROR: Invalid installer signature'
+    rm composer-setup.php
+    exit 1
+fi
+
+php composer-setup.php --install-dir=/usr/bin --filename=composer
+RESULT=$?
+rm composer-setup.php
+exit $RESULT
diff --git a/7.0/fpm/Dockerfile b/7.0/fpm/Dockerfile
index 437f6c9..503fc41 100644
--- a/7.0/fpm/Dockerfile
+++ b/7.0/fpm/Dockerfile
@@ -16,3 +16,7 @@ RUN apt-get update \
     # Cleanup to keep the images size small
     && apt-get autoremove -y \
     && rm -r /var/lib/apt/lists/*
+
+# Install composer
+COPY install-composer /install-composer
+RUN /install-composer && rm /install-composer
diff --git a/7.0/fpm/install-composer b/7.0/fpm/install-composer
new file mode 100755
index 0000000..f7d34be
--- /dev/null
+++ b/7.0/fpm/install-composer
@@ -0,0 +1,17 @@
+#!/bin/sh
+
+EXPECTED_SIGNATURE=$(curl https://composer.github.io/installer.sig)
+php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
+ACTUAL_SIGNATURE=$(php -r "echo hash_file('SHA384', 'composer-setup.php');")
+
+if [ "$EXPECTED_SIGNATURE" != "$ACTUAL_SIGNATURE" ]
+then
+    >&2 echo 'ERROR: Invalid installer signature'
+    rm composer-setup.php
+    exit 1
+fi
+
+php composer-setup.php --install-dir=/usr/bin --filename=composer
+RESULT=$?
+rm composer-setup.php
+exit $RESULT
diff --git a/7.1/apache/Dockerfile b/7.1/apache/Dockerfile
index fb4979d..5377a59 100644
--- a/7.1/apache/Dockerfile
+++ b/7.1/apache/Dockerfile
@@ -16,3 +16,7 @@ RUN apt-get update \
     # Cleanup to keep the images size small
     && apt-get autoremove -y \
     && rm -r /var/lib/apt/lists/*
+
+# Install composer
+COPY install-composer /install-composer
+RUN /install-composer && rm /install-composer
diff --git a/7.1/apache/install-composer b/7.1/apache/install-composer
new file mode 100755
index 0000000..f7d34be
--- /dev/null
+++ b/7.1/apache/install-composer
@@ -0,0 +1,17 @@
+#!/bin/sh
+
+EXPECTED_SIGNATURE=$(curl https://composer.github.io/installer.sig)
+php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
+ACTUAL_SIGNATURE=$(php -r "echo hash_file('SHA384', 'composer-setup.php');")
+
+if [ "$EXPECTED_SIGNATURE" != "$ACTUAL_SIGNATURE" ]
+then
+    >&2 echo 'ERROR: Invalid installer signature'
+    rm composer-setup.php
+    exit 1
+fi
+
+php composer-setup.php --install-dir=/usr/bin --filename=composer
+RESULT=$?
+rm composer-setup.php
+exit $RESULT
diff --git a/7.1/fpm/Dockerfile b/7.1/fpm/Dockerfile
index 0b7ac12..84a8fe5 100644
--- a/7.1/fpm/Dockerfile
+++ b/7.1/fpm/Dockerfile
@@ -16,3 +16,7 @@ RUN apt-get update \
     # Cleanup to keep the images size small
     && apt-get autoremove -y \
     && rm -r /var/lib/apt/lists/*
+
+# Install composer
+COPY install-composer /install-composer
+RUN /install-composer && rm /install-composer
diff --git a/7.1/fpm/install-composer b/7.1/fpm/install-composer
new file mode 100755
index 0000000..f7d34be
--- /dev/null
+++ b/7.1/fpm/install-composer
@@ -0,0 +1,17 @@
+#!/bin/sh
+
+EXPECTED_SIGNATURE=$(curl https://composer.github.io/installer.sig)
+php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
+ACTUAL_SIGNATURE=$(php -r "echo hash_file('SHA384', 'composer-setup.php');")
+
+if [ "$EXPECTED_SIGNATURE" != "$ACTUAL_SIGNATURE" ]
+then
+    >&2 echo 'ERROR: Invalid installer signature'
+    rm composer-setup.php
+    exit 1
+fi
+
+php composer-setup.php --install-dir=/usr/bin --filename=composer
+RESULT=$?
+rm composer-setup.php
+exit $RESULT