diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 37f97f2..4b43e79 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -72,7 +72,7 @@ ruby-2.6.1-golang-1.11-git-2.18-chrome-71.0-node-10.x-yarn-1.12-postgresql-9.6-g
 ruby-2.5.3-golang-1.11-git-2.18-chrome-71.0-node-10.x-yarn-1.12-postgresql-10-graphicsmagick-1.3.29 test: *test_custom
 ruby-2.5.3-git-2.18-chrome-69.0-node-8.x-yarn-1.12-graphicsmagick-1.3.29-docker-18.06.1 test: *test_custom
 ruby-2.5.3-git-2.18-chrome-71.0-node-8.x-yarn-1.12-graphicsmagick-1.3.29-docker-18.06.1 test: *test_custom
-ruby-2.5.5-git-2.18-chrome-71.0-node-8.x-yarn-1.12-graphicsmagick-1.3.29-docker-18.06.1 test: *test_custom
+ruby-2.5.5-git-2.18-chrome-73.0-node-8.x-yarn-1.12-graphicsmagick-1.3.29-docker-18.06.1 test: *test_custom
 ruby-2.6.2-git-2.18-chrome-71.0-node-8.x-yarn-1.12-graphicsmagick-1.3.29-docker-18.06.1 test: *test_custom
 
 # Used by www-gitlab-com's rspec job: https://gitlab.com/gitlab-com/www-gitlab-com/blob/master/.gitlab-ci.yml
@@ -122,7 +122,7 @@ ruby-2.6.1-golang-1.11-git-2.18-chrome-71.0-node-10.x-yarn-1.12-postgresql-9.6-g
 ruby-2.5.3-golang-1.11-git-2.18-chrome-71.0-node-10.x-yarn-1.12-postgresql-10-graphicsmagick-1.3.29: *build_and_deploy_custom
 ruby-2.5.3-git-2.18-chrome-69.0-node-8.x-yarn-1.12-graphicsmagick-1.3.29-docker-18.06.1: *build_and_deploy_custom
 ruby-2.5.3-git-2.18-chrome-71.0-node-8.x-yarn-1.12-graphicsmagick-1.3.29-docker-18.06.1: *build_and_deploy_custom
-ruby-2.5.5-git-2.18-chrome-71.0-node-8.x-yarn-1.12-graphicsmagick-1.3.29-docker-18.06.1: *build_and_deploy_custom
+ruby-2.5.5-git-2.18-chrome-73.0-node-8.x-yarn-1.12-graphicsmagick-1.3.29-docker-18.06.1: *build_and_deploy_custom
 ruby-2.6.2-git-2.18-chrome-71.0-node-8.x-yarn-1.12-graphicsmagick-1.3.29-docker-18.06.1: *build_and_deploy_custom
 
 # Used by www-gitlab-com's rspec job: https://gitlab.com/gitlab-com/www-gitlab-com/blob/master/.gitlab-ci.yml
diff --git a/scripts/custom-docker-build b/scripts/custom-docker-build
index eb9b2a3..52d5281 100755
--- a/scripts/custom-docker-build
+++ b/scripts/custom-docker-build
@@ -42,6 +42,10 @@ function print_chrome_args() {
             CHROME_VERSION=71.0.3578.98-1
             CHROME_DRIVER_VERSION=2.45
             ;;
+        73|73.0)
+            CHROME_VERSION=73.0.3683.103-1
+            CHROME_DRIVER_VERSION=73.0.3683.68
+            ;;
         *) echo "Unknown chrome version $1"; exit 1;
     esac
     printf -- "--build-arg CHROME_VERSION=%s " "$CHROME_VERSION"