diff --git a/.travis.yml b/.travis.yml
index 74dd570..2398aac 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,10 @@ sudo: false
 
 language: python
 
+branches:
+  only:
+  - integration-test
+
 env:
   global:
     - secure: "hqvINLgdxfGqZju03GgBWzZ1pdJkoIzx78FULktXkYGUXYRDSMh/tONjtKDMKJvK9rFflkZNIrTZ5j2ueipd73iXl2pM0+jXl3Z64rBa+XK6Kq78p/qP4XdpFoMmOVvs6YIumXHmtxCfcT6EtvHrDkkoNF7oKpuISObKEMDONOLyuEcO6ZjexzmkUpioxjDTkvaE5+jcXflqPLp5JR9A7E75Tofct/y7i2lWOfR45FCY7DIpuE82Hkic41ZhHWuMguedw7L+cIow449ynZQpGSGjpsOciu9OtneJB7LZakVZsOYb3e34+i0TdjqiLYwQa46vqLW4TEK5MLXQI5FF2TF3pvJXiIrFr/gAhoP5YMrbSGHkOYZtAcYVUoMX38lQctUU9NzaELkayo9RqFodXboBs2hniqFbxHuhYYC9tPsZNyTTf/+OcZXS9Ic1iE4HR2Ok4xOg6QF8iOTXW6nPt2Ct0f5oWAdGlyjmxYFVGs3l44g9HV84RkeHYP/BS43C3blAd0SIjtab/4TSgFcmSfv+M/5yl3ZsidBc9yTMvgOvZXPIhOFJq+XLTL4QB0tN1Sdy1wofs7wnRFjbGrw4kOTBrcCkBioqMiMZzTtmeVejjMr61cSmLG7lzPoYCvc5vpS3xAca5XiOECb50oCwkxxoXDoqdEGLz3RQQfnJWRk="
@@ -19,7 +23,7 @@ install:
   - echo "creating droplet with name ${DROPLET_NAME}"
   - DROPLET_NAME=${DROPLET_NAME} ${DOCTL} compute ssh-key create ${DROPLET_NAME} --no-header --public-key "$(cat ~/.ssh/id_rsa.pub)"
   - sleep 2
-  - DROPLET_NAME=${DROPLET_NAME} ${DOCTL} compute droplet create ${DROPLET_NAME} --wait --region fra1 --image debian-8-x64 --size 8gb --ssh-keys $(${DOCTL} compute ssh-key list --no-header | grep ${DROPLET_NAME} | awk -F ' ' '{print $1}')
+  - DROPLET_NAME=${DROPLET_NAME} ${DOCTL} compute droplet create ${DROPLET_NAME} --wait --region fra1 --image debian-9-x64 --size 4gb --ssh-keys $(${DOCTL} compute ssh-key list --no-header | grep ${DROPLET_NAME} | awk -F ' ' '{print $1}')
 
 after_script:
   - ${DOCTL} compute droplet delete ${DROPLET_NAME} -f
diff --git a/scripts/_common.sh b/scripts/_common.sh
index 8d2237e..eddb1d4 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -62,7 +62,7 @@ installdeps(){
     sudo yunohost service add mongodb -l /var/log/mongodb/mongodb.log
   else
     #Install mongodb for debian x86/x64
-    sudo apt-get install dirmngr && sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 2930ADAE8CAF5059EE73BB4B58712A2291FA4AD5
+    sudo apt-get install dirmngr && sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 9DA31620334BD75D9DCB49F368818C72E52529D4
     echo "deb http://repo.mongodb.org/apt/debian ${DEBIAN_ISSUE}/mongodb-org/4.0 main" | sudo tee /etc/apt/sources.list.d/mongodb-org-4.0.list
     sudo apt-get update
     sudo apt-get install -y mongodb-org