diff --git a/test-service/composer.json b/test-service/composer.json
index e53c13cd..96cb4155 100644
--- a/test-service/composer.json
+++ b/test-service/composer.json
@@ -11,7 +11,7 @@
     "kevinrob/guzzle-cache-middleware": "^7.0",
     "launchdarkly/server-sdk": "*",
     "mikecao/flight": "^3",
-    "monolog/monolog": "^2",
+    "monolog/monolog": "^3",
     "php": ">=8.1",
     "psr/log": "3.*",
     "symfony/cache": "^6.4|^7.2"