diff --git a/.circleci/config.yml b/.circleci/config.yml
index 27a9650c14c..69331bb23aa 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -41,7 +41,7 @@ version: 2
 jobs:
   build:
     <<: *job_defaults
-    resource_class: large
+    resource_class: xlarge
     steps:
       - checkout:
           <<: *post_checkout
diff --git a/scripts/saucelabs/start-tunnel.sh b/scripts/saucelabs/start-tunnel.sh
index d27068fddfd..eec71ab1c30 100755
--- a/scripts/saucelabs/start-tunnel.sh
+++ b/scripts/saucelabs/start-tunnel.sh
@@ -2,7 +2,7 @@
 
 set -e -o pipefail
 
-TUNNEL_FILE="sc-4.4.12-linux.tar.gz"
+TUNNEL_FILE="sc-4.5.0-linux.tar.gz"
 TUNNEL_URL="https://saucelabs.com/downloads/${TUNNEL_FILE}"
 TUNNEL_DIR="/tmp/saucelabs-connect"