diff --git a/src/DatadogLoggingService.js b/src/DatadogLoggingService.js
index ffc867d..e2c6a5f 100644
--- a/src/DatadogLoggingService.js
+++ b/src/DatadogLoggingService.js
@@ -35,8 +35,8 @@ class DatadogLoggingService extends NewRelicLoggingService {
       service: process.env.DATADOG_SERVICE,
       env: process.env.DATADOG_ENV,
       version: process.env.DATADOG_VERSION,
-      sessionSampleRate: 50,
-      sessionReplaySampleRate: 100,
+      sessionSampleRate: parseInt(process.env.DATADOG_SESSION_SAMPLE_RATE || 0, 10),
+      sessionReplaySampleRate: parseInt(process.env.DATADOG_SESSION_REPLAY_SAMPLE_RATE || 0, 10),
       trackUserInteractions: true,
       trackResources: true,
       trackLongTasks: true,
@@ -47,7 +47,7 @@ class DatadogLoggingService extends NewRelicLoggingService {
       site: process.env.DATADOG_SITE,
       env: process.env.DATADOG_ENV,
       forwardErrorsToLogs: true,
-      sessionSampleRate: 100,
+      sessionSampleRate: parseInt(process.env.DATADOG_LOGS_SESSION_SAMPLE_RATE || 0, 10),
       service: process.env.DATADOG_SERVICE,
     });
   }