diff --git a/package.json b/package.json
index c1ff3abe..1feefd17 100644
--- a/package.json
+++ b/package.json
@@ -57,7 +57,7 @@
     "@glimmer/component": "^1.1.2",
     "@glimmer/tracking": "^1.1.2",
     "broccoli-asset-rev": "^3.0.0",
-    "concurrently": "^8.2.2",
+    "concurrently": "^9.1.0",
     "ember-cli": "~5.11.0",
     "ember-cli-clean-css": "^3.0.0",
     "ember-cli-dependency-checker": "^3.3.2",
diff --git a/yarn.lock b/yarn.lock
index bbcca4f5..ea75532f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1910,13 +1910,6 @@
   dependencies:
     regenerator-runtime "^0.13.11"
 
-"@babel/runtime@^7.21.0":
-  version "7.22.10"
-  resolved "https://registry.yarnpkg.com/@babel/runtime/-/runtime-7.22.10.tgz#ae3e9631fd947cb7e3610d3e9d8fef5f76696682"
-  integrity sha512-21t/fkKLMZI4pqP2wlmsQAWnYW1PDyKyyUV4vCi+B25ydmdaYTKXPwCj0BzSUnZf4seIiYvSA3jcZ3gdsMFkLQ==
-  dependencies:
-    regenerator-runtime "^0.14.0"
-
 "@babel/template@^7.18.10":
   version "7.18.10"
   resolved "https://registry.yarnpkg.com/@babel/template/-/template-7.18.10.tgz#6f9134835970d1dbf0835c0d100c9f38de0c5e71"
@@ -6055,17 +6048,15 @@ concat-stream@^1.5.0:
     readable-stream "^2.2.2"
     typedarray "^0.0.6"
 
-concurrently@^8.2.2:
-  version "8.2.2"
-  resolved "https://registry.yarnpkg.com/concurrently/-/concurrently-8.2.2.tgz#353141985c198cfa5e4a3ef90082c336b5851784"
-  integrity sha512-1dP4gpXFhei8IOtlXRE/T/4H88ElHgTiUzh71YUmtjTEHMSRS2Z/fgOxHSxxusGHogsRfxNq1vyAwxSC+EVyDg==
+concurrently@^9.1.0:
+  version "9.1.0"
+  resolved "https://registry.yarnpkg.com/concurrently/-/concurrently-9.1.0.tgz#8da6d609f4321752912dab9be8710232ac496aa0"
+  integrity sha512-VxkzwMAn4LP7WyMnJNbHN5mKV9L2IbyDjpzemKr99sXNR3GqRNMMHdm7prV1ws9wg7ETj6WUkNOigZVsptwbgg==
   dependencies:
     chalk "^4.1.2"
-    date-fns "^2.30.0"
     lodash "^4.17.21"
     rxjs "^7.8.1"
     shell-quote "^1.8.1"
-    spawn-command "0.0.2"
     supports-color "^8.1.1"
     tree-kill "^1.2.2"
     yargs "^17.7.2"
@@ -6458,13 +6449,6 @@ data-urls@^3.0.0, data-urls@^3.0.1:
     whatwg-mimetype "^3.0.0"
     whatwg-url "^11.0.0"
 
-date-fns@^2.30.0:
-  version "2.30.0"
-  resolved "https://registry.yarnpkg.com/date-fns/-/date-fns-2.30.0.tgz#f367e644839ff57894ec6ac480de40cae4b0f4d0"
-  integrity sha512-fnULvOpxnC5/Vg3NCiWelDsLiUc9bRwAPs/+LfTLNvetFCtCTN+yQz15C/fs4AwX1R9K5GLtLfn8QW+dWisaAw==
-  dependencies:
-    "@babel/runtime" "^7.21.0"
-
 date-fns@^3.6.0:
   version "3.6.0"
   resolved "https://registry.yarnpkg.com/date-fns/-/date-fns-3.6.0.tgz#f20ca4fe94f8b754951b24240676e8618c0206bf"
@@ -13703,11 +13687,6 @@ regenerator-runtime@^0.13.11, regenerator-runtime@^0.13.4:
   resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.13.11.tgz#f6dca3e7ceec20590d07ada785636a90cdca17f9"
   integrity sha512-kY1AZVr2Ra+t+piVaJ4gxaFaReZVH40AKNo7UCX6W+dEwBo/2oZJzqfuN1qLq1oL45o56cPaTXELwrTh8Fpggg==
 
-regenerator-runtime@^0.14.0:
-  version "0.14.0"
-  resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.14.0.tgz#5e19d68eb12d486f797e15a3c6a918f7cec5eb45"
-  integrity sha512-srw17NI0TUWHuGa5CFGGmhfNIeja30WMBfbslPNhf6JrqQlLN5gcrvig1oqPxiVaXb0oW0XRKtH6Nngs5lKCIA==
-
 regenerator-transform@^0.15.1:
   version "0.15.1"
   resolved "https://registry.yarnpkg.com/regenerator-transform/-/regenerator-transform-0.15.1.tgz#f6c4e99fc1b4591f780db2586328e4d9a9d8dc56"
@@ -14776,11 +14755,6 @@ spawn-args@^0.2.0:
   resolved "https://registry.yarnpkg.com/spawn-args/-/spawn-args-0.2.0.tgz#fb7d0bd1d70fd4316bd9e3dec389e65f9d6361bb"
   integrity sha512-73BoniQDcRWgnLAf/suKH6V5H54gd1KLzwYN9FB6J/evqTV33htH9xwV/4BHek+++jzxpVlZQKKZkqstPQPmQg==
 
-spawn-command@0.0.2:
-  version "0.0.2"
-  resolved "https://registry.yarnpkg.com/spawn-command/-/spawn-command-0.0.2.tgz#9544e1a43ca045f8531aac1a48cb29bdae62338e"
-  integrity sha512-zC8zGoGkmc8J9ndvml8Xksr1Amk9qBujgbF0JAIWO7kXr43w0h/0GJNM/Vustixu+YE8N/MTrQ7N31FvHUACxQ==
-
 spdx-correct@^3.0.0:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/spdx-correct/-/spdx-correct-3.2.0.tgz#4f5ab0668f0059e34f9c00dce331784a12de4e9c"