diff --git a/build-scripts/drupal7/Dockerfile b/build-scripts/drupal7/Dockerfile
index 765ce9b77ac7d622ae6bba2c548a63397a486a2e..aeb62e3d61b274fd30751b66b3e4a99ec4b05842 100644
--- a/build-scripts/drupal7/Dockerfile
+++ b/build-scripts/drupal7/Dockerfile
@@ -35,22 +35,23 @@ RUN apt-get install -y \
     vim \
     git \
     apache2 \
-    php5.6 \
-    php5.6-apc \
-    php5.6-fpm \
-    php5.6-xml \
-    php5.6-simplexml \
-    php5.6-mbstring \
-    php5.6-cli \
-    php5.6-mysql \
-    php5.6-gd \
-    php5.6-curl \
-    php5.6-ldap \
-    php5.6-mcrypt \
-    php5.6-zip \
+    php7.1 \
+    php7.1-apc \
+    php7.1-fpm \
+    php7.1-xml \
+    php7.1-simplexml \
+    php7.1-mbstring \
+    php7.1-cli \
+    php7.1-mysql \
+    php7.1-gd \
+    php7.1-curl \
+    php7.1-ldap \
+    php7.1-mcrypt \
+    php7.1-zip \
     php-pear \
     libapache2-mod-php5.6 \
     optipng \
+    pdftk \
     jpegoptim \
     imagemagick \
     libapache2-mod-fcgid \