diff --git a/packages/shared/sdk-server/__tests__/events/EventSender.test.ts b/packages/shared/sdk-server/__tests__/events/EventSender.test.ts
index 08d9743c9a..ddf64dd419 100644
--- a/packages/shared/sdk-server/__tests__/events/EventSender.test.ts
+++ b/packages/shared/sdk-server/__tests__/events/EventSender.test.ts
@@ -112,6 +112,7 @@ describe('given an event sender', () => {
       authorization: 'sdk-key',
       'user-agent': 'NodeJSClient/2.0.2',
       'x-launchDarkly-event-schema': '4',
+      'content-type': 'application/json',
     });
     expect(req1.options?.headers!['x-launchdarkly-payload-id']).toBeDefined();
   });
@@ -132,6 +133,7 @@ describe('given an event sender', () => {
     expect(req1.options?.headers).toEqual({
       authorization: 'sdk-key',
       'user-agent': 'NodeJSClient/2.0.2',
+      'content-type': 'application/json',
     });
   });
 
diff --git a/packages/shared/sdk-server/src/events/EventSender.ts b/packages/shared/sdk-server/src/events/EventSender.ts
index 074706d02e..f0586076fc 100644
--- a/packages/shared/sdk-server/src/events/EventSender.ts
+++ b/packages/shared/sdk-server/src/events/EventSender.ts
@@ -54,8 +54,9 @@ export default class EventSender implements subsystem.LDEventSender {
       status: subsystem.LDDeliveryStatus.Succeeded,
     };
 
-    const headers = {
+    const headers: Record<string, string> = {
       ...this.defaultHeaders,
+      'content-type': 'application/json',
     };
 
     if (payloadId) {