diff --git a/scripts/_common.sh b/scripts/_common.sh
index 6af0ae5..8c01ce3 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -4,11 +4,30 @@ ROCKETCHAT_VERSION=0.58.4
 ROCKETCHAT_SHASUM=ed53712b37571b959b5c8c8947d6335c21fced316f2b3174bfe027fa25700c44
 NODE_VERSION=4.7.1
 
+checkcmd() {
+  curl -m 1 -s localhost:$port$path/api/v1/info | \
+    python -c "import sys, json; print json.load(sys.stdin)['success']" 2>/dev/null | \
+    grep "True" >/dev/null 2>&1
+}
+
 waitforservice() {
-  isup=false; x=90; while [ $x -gt 0 ];do echo "Waiting approx. $x seconds..."; \
-  x=$(( $x - 1 )); sleep 1; if $(curl -m 1 -s localhost:$port${path:-/}/api/v1/info | \
-  grep -e "success.*true" >/dev/null 2>&1); then isup=true; break; fi; done && if $isup; \
-  then echo "service is up"; else {ynh_die "$app could not be started"; fi
+  isup=false
+  x=90
+  while [ $x -gt 0 ]; do
+    echo "Waiting approx. $x seconds..."
+    x=$(( $x - 1 ))
+    sleep 1
+
+    if checkcmd; then
+      isup=true; break;
+    fi;
+  done
+
+  if $isup; then
+    echo "service is up"
+  else
+    ynh_die "$app could not be started"
+  fi
 }
 
 installdeps(){
diff --git a/scripts/restore b/scripts/restore
index e776f88..b3abc2e 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -39,9 +39,6 @@ if [[ ! $? -eq 0 ]]; then
   ynh_die "domain not available"
 fi
 
-# Register/book a web path for an app
-ynh_webpath_register $app $domain $path
-
 # Check destination directory
 [[ -d $final_path ]] && ynh_die \
 "The destination directory '$final_path' already exists.\
diff --git a/scripts/upgrade b/scripts/upgrade
index 1a37b64..5e58aa1 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -23,10 +23,18 @@ sudo systemctl stop rocketchat
 sudo rm -rf $final_path
 sudo mkdir -p $final_path
 
-# upgrade to the latest rocketchat
-sudo curl -s -L -o $final_path/rocket.chat-latest.gtar "https://download.rocket.chat/stable"
-sudo tar -xzf $final_path/rocket.chat-latest.gtar -C $final_path --strip-components=1 bundle
-sudo rm $final_path/rocket.chat-latest.gtar
+# download and extract rocketchat
+echo "Downloading rocket.chat-$ROCKETCHAT_VERSION.gtar from https://download.rocket.chat/build/rocket.chat-${ROCKETCHAT_VERSION}.tgz."
+sudo curl -s -L -o $final_path/rocket.chat-$ROCKETCHAT_VERSION.gtar "https://download.rocket.chat/build/rocket.chat-${ROCKETCHAT_VERSION}.tgz"
+SHA_DOWNLOAD=$(sha256sum $final_path/rocket.chat-$ROCKETCHAT_VERSION.gtar | grep -o "^[a-f0-9]*")
+if [[ ! "$SHA_DOWNLOAD" == "$ROCKETCHAT_SHASUM" ]]; then
+  ynh_die "The sha256sum does not match the configured one"
+fi
+
+sudo tar -xzf $final_path/rocket.chat-$ROCKETCHAT_VERSION.gtar -C $final_path --strip-components=1 bundle
+sudo rm $final_path/rocket.chat-$ROCKETCHAT_VERSION.gtar
+
+sudo chown -R $serviceuser: $final_path
 
 cd $final_path/programs/server/
 sudo npm install --production