diff --git a/logging/log.ts b/logging/log.ts
index b2f5f8d3..77ad7c86 100644
--- a/logging/log.ts
+++ b/logging/log.ts
@@ -22,7 +22,8 @@ export type Tags =
   | 'invariant-violation'
   | 'state-transition'
   | 'invalid-request'
-  | 'unhealthy-session';
+  | 'unhealthy-session'
+  | 'uncaught-handler-error';
 
 const cleanedLogFn = (log: LogFn) => {
   return (msg: string, metadata?: MessageMetadata) => {
@@ -53,7 +54,7 @@ export type MessageMetadata = Partial<{
     traceId: string;
     spanId: string;
   };
-  extras: unknown;
+  extras?: Record<string, unknown>;
 }>;
 
 export class BaseLogger implements Logger {
diff --git a/package-lock.json b/package-lock.json
index fbbec3f9..89861420 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@replit/river",
-  "version": "0.200.3",
+  "version": "0.200.4",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@replit/river",
-      "version": "0.200.3",
+      "version": "0.200.4",
       "license": "MIT",
       "dependencies": {
         "@msgpack/msgpack": "^3.0.0-beta2",
diff --git a/package.json b/package.json
index 8802fa1d..9e874b3c 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@replit/river",
   "description": "It's like tRPC but... with JSON Schema Support, duplex streaming and support for service multiplexing. Transport agnostic!",
-  "version": "0.200.3",
+  "version": "0.200.4",
   "type": "module",
   "exports": {
     ".": {
diff --git a/router/server.ts b/router/server.ts
index 15d7bfed..a4df77f5 100644
--- a/router/server.ts
+++ b/router/server.ts
@@ -515,7 +515,9 @@ class RiverServer<Services extends AnyServiceSchemaMap>
           },
           extras: {
             error: errorMsg,
+            originalException: err,
           },
+          tags: ['uncaught-handler-error'],
         },
       );
 
diff --git a/transport/impls/ws/connection.ts b/transport/impls/ws/connection.ts
index 6a82149a..f7a1cbe8 100644
--- a/transport/impls/ws/connection.ts
+++ b/transport/impls/ws/connection.ts
@@ -1,7 +1,7 @@
 import { Connection } from '../../connection';
 import { WsLike } from './wslike';
 
-interface ConnectionInfoExtras {
+interface ConnectionInfoExtras extends Record<string, unknown> {
   headers: Record<string, string>;
 }