diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 78229a40..5609409c 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -3,7 +3,7 @@ before_script:
     - bash build/docker_install.sh > /dev/null
     # Install composer dependencies
     - curl -sS https://getcomposer.org/installer | php
-    - php composer.phar install
+    - php composer.phar install --no-dev
 
 # Composer stores all downloaded packages in the vendor/ directory.
 # Do not use the following if the vendor/ directory is commited to
diff --git a/.travis.yml b/.travis.yml
index a863b2c5..cf72aec6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,7 @@
 language: php
 
 install:
-  - composer install
+  - composer install --no-dev
 
 php:
   - 5.5