diff --git a/composer.json b/composer.json
index 68bb315..515cb16 100644
--- a/composer.json
+++ b/composer.json
@@ -26,7 +26,7 @@
         "drupal/redirect": "^1.5",
         "drupal/speakerdeck_field": "^1.0",
         "drupal/xmlsitemap": "^1.0",
-        "drush/drush": "^10.2",
+        "drush/drush": "^9",
         "tightenco/collect": "^6.15"
     },
     "require-dev": {
diff --git a/composer.lock b/composer.lock
index 057a965..ec77b20 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "31cc09e6d005852d1cdf8df6cbe0c1d5",
+    "content-hash": "dde2e85b8d9bae5545c6f59b95d23fde",
     "packages": [
         {
             "name": "asm89/stack-cors",
@@ -2662,43 +2662,49 @@
         },
         {
             "name": "drush/drush",
-            "version": "10.2.0",
+            "version": "9.7.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/drush-ops/drush.git",
-                "reference": "f068021102caf90042f83a280c9316eb7e29ca12"
+                "reference": "ab5e345a72c9187a7d770486a09691f6526826aa"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/drush-ops/drush/zipball/f068021102caf90042f83a280c9316eb7e29ca12",
-                "reference": "f068021102caf90042f83a280c9316eb7e29ca12",
+                "url": "https://api.github.com/repos/drush-ops/drush/zipball/ab5e345a72c9187a7d770486a09691f6526826aa",
+                "reference": "ab5e345a72c9187a7d770486a09691f6526826aa",
                 "shasum": ""
             },
             "require": {
-                "chi-teck/drupal-code-generator": "^1.30.5",
+                "chi-teck/drupal-code-generator": "^1.28.1",
                 "composer/semver": "^1.4",
+                "consolidation/annotated-command": "^2.12",
                 "consolidation/config": "^1.2",
                 "consolidation/filter-via-dot-access-data": "^1",
-                "consolidation/robo": "^1 || ^2",
+                "consolidation/output-formatters": "^3.3.1",
+                "consolidation/robo": "^1.4.6",
                 "consolidation/site-alias": "^3.0.0@stable",
-                "consolidation/site-process": "^2.1 || ^4",
+                "consolidation/site-process": "^2.0.3",
                 "ext-dom": "*",
                 "grasmash/yaml-expander": "^1.1.1",
                 "league/container": "~2",
-                "php": ">=7.1.3",
+                "php": ">=5.6.0",
                 "psr/log": "~1.0",
                 "psy/psysh": "~0.6",
+                "symfony/console": "^3.4",
                 "symfony/event-dispatcher": "^3.4 || ^4.0",
                 "symfony/finder": "^3.4 || ^4.0",
-                "symfony/var-dumper": "^3.4 || ^4.0 || ^5.0",
-                "symfony/yaml": "^3.4 || ^4.0",
-                "webflo/drupal-finder": "^1.2",
+                "symfony/process": "^3.4",
+                "symfony/var-dumper": "^3.4 || ^4.0",
+                "symfony/yaml": "^3.4",
+                "webflo/drupal-finder": "^1.1",
                 "webmozart/path-util": "^2.1.0"
             },
             "require-dev": {
                 "composer/installers": "^1.2",
                 "cweagans/composer-patches": "~1.0",
                 "drupal/alinks": "1.0.0",
+                "drupal/devel": "^2",
+                "drupal/empty_theme": "1.0",
                 "g1a/composer-test-scenarios": "^3",
                 "lox/xhprof": "dev-master",
                 "phpunit/phpunit": "^4.8.36 || ^6.1",
@@ -2738,8 +2744,21 @@
                         "type:drupal-drush"
                     ]
                 },
+                "scenarios": {
+                    "php5": {
+                        "config": {
+                            "platform": {
+                                "php": "5.6.38"
+                            }
+                        },
+                        "require-dev": {
+                            "webflo/drupal-core-strict": "8.6.x-dev",
+                            "webflo/drupal-core-require-dev": "8.6.x-dev"
+                        }
+                    }
+                },
                 "branch-alias": {
-                    "dev-master": "10.x-dev"
+                    "dev-master": "9.x-dev"
                 }
             },
             "autoload": {
@@ -2788,7 +2807,7 @@
             ],
             "description": "Drush is a command line shell and scripting interface for Drupal, a veritable Swiss Army knife designed to make life easier for those of us who spend some of our working hours hacking away at the command prompt.",
             "homepage": "http://www.drush.org",
-            "time": "2020-01-25T17:04:39+00:00"
+            "time": "2020-02-09T17:29:51+00:00"
         },
         {
             "name": "easyrdf/easyrdf",