diff --git a/extensions/diagnostics-otel/package.json b/extensions/diagnostics-otel/package.json
index 994e9edb58a..f35358809cf 100644
--- a/extensions/diagnostics-otel/package.json
+++ b/extensions/diagnostics-otel/package.json
@@ -6,9 +6,9 @@
   "dependencies": {
     "@opentelemetry/api": "^1.9.0",
     "@opentelemetry/api-logs": "^0.212.0",
-    "@opentelemetry/exporter-logs-otlp-http": "^0.212.0",
-    "@opentelemetry/exporter-metrics-otlp-http": "^0.212.0",
-    "@opentelemetry/exporter-trace-otlp-http": "^0.212.0",
+    "@opentelemetry/exporter-logs-otlp-proto": "^0.212.0",
+    "@opentelemetry/exporter-metrics-otlp-proto": "^0.212.0",
+    "@opentelemetry/exporter-trace-otlp-proto": "^0.212.0",
     "@opentelemetry/resources": "^2.5.1",
     "@opentelemetry/sdk-logs": "^0.212.0",
     "@opentelemetry/sdk-metrics": "^2.5.1",
diff --git a/extensions/diagnostics-otel/src/service.test.ts b/extensions/diagnostics-otel/src/service.test.ts
index 8189ecaec8c..ab3fb57e15a 100644
--- a/extensions/diagnostics-otel/src/service.test.ts
+++ b/extensions/diagnostics-otel/src/service.test.ts
@@ -51,11 +51,11 @@ vi.mock("@opentelemetry/sdk-node", () => ({
   },
 }));
 
-vi.mock("@opentelemetry/exporter-metrics-otlp-http", () => ({
+vi.mock("@opentelemetry/exporter-metrics-otlp-proto", () => ({
   OTLPMetricExporter: class {},
 }));
 
-vi.mock("@opentelemetry/exporter-trace-otlp-http", () => ({
+vi.mock("@opentelemetry/exporter-trace-otlp-proto", () => ({
   OTLPTraceExporter: class {
     constructor(options?: unknown) {
       traceExporterCtor(options);
@@ -63,7 +63,7 @@ vi.mock("@opentelemetry/exporter-trace-otlp-http", () => ({
   },
 }));
 
-vi.mock("@opentelemetry/exporter-logs-otlp-http", () => ({
+vi.mock("@opentelemetry/exporter-logs-otlp-proto", () => ({
   OTLPLogExporter: class {},
 }));
 
diff --git a/extensions/diagnostics-otel/src/service.ts b/extensions/diagnostics-otel/src/service.ts
index 0749708c881..be9a547963f 100644
--- a/extensions/diagnostics-otel/src/service.ts
+++ b/extensions/diagnostics-otel/src/service.ts
@@ -1,8 +1,8 @@
 import { metrics, trace, SpanStatusCode } from "@opentelemetry/api";
 import type { SeverityNumber } from "@opentelemetry/api-logs";
-import { OTLPLogExporter } from "@opentelemetry/exporter-logs-otlp-http";
-import { OTLPMetricExporter } from "@opentelemetry/exporter-metrics-otlp-http";
-import { OTLPTraceExporter } from "@opentelemetry/exporter-trace-otlp-http";
+import { OTLPLogExporter } from "@opentelemetry/exporter-logs-otlp-proto";
+import { OTLPMetricExporter } from "@opentelemetry/exporter-metrics-otlp-proto";
+import { OTLPTraceExporter } from "@opentelemetry/exporter-trace-otlp-proto";
 import { resourceFromAttributes } from "@opentelemetry/resources";
 import { BatchLogRecordProcessor, LoggerProvider } from "@opentelemetry/sdk-logs";
 import { PeriodicExportingMetricReader } from "@opentelemetry/sdk-metrics";
@@ -657,7 +657,7 @@ export function createDiagnosticsOtelService(): OpenClawPluginService {
       });
 
       if (logsEnabled) {
-        ctx.logger.info("diagnostics-otel: logs exporter enabled (OTLP/HTTP)");
+        ctx.logger.info("diagnostics-otel: logs exporter enabled (OTLP/Protobuf)");
       }
     },
     async stop() {