diff --git a/packages/devtools/lib/src/framework/framework_core.dart b/packages/devtools/lib/src/framework/framework_core.dart
index 2173086dcdb7..8d4661b9b85c 100644
--- a/packages/devtools/lib/src/framework/framework_core.dart
+++ b/packages/devtools/lib/src/framework/framework_core.dart
@@ -5,7 +5,7 @@
 import 'dart:async';
 import 'dart:html' hide Screen;
 
-import 'package:devtools/src/utils.dart';
+import 'package:vm_service_lib/utils.dart';
 
 import '../../devtools.dart' as devtools show version;
 import '../core/message_bus.dart';
@@ -45,7 +45,7 @@ class FrameworkCore {
 
       // Map the URI (which may be Observatory web app) to a WebSocket URI for
       // the VM service.
-      uri = getVmServiceUriFromObservatoryUri(uri);
+      uri = convertToWebSocketUrl(serviceProtocolUrl: uri);
 
       try {
         final VmServiceWrapper service = await connect(uri, finishedCompleter);
diff --git a/packages/devtools/lib/src/utils.dart b/packages/devtools/lib/src/utils.dart
index 2a7614fd5b8e..68265c19c261 100644
--- a/packages/devtools/lib/src/utils.dart
+++ b/packages/devtools/lib/src/utils.dart
@@ -163,20 +163,6 @@ class Property<T> {
   Stream<T> get onValueChange => _changeController.stream;
 }
 
-/// Map the URI (which may already be Observatory web app) to a WebSocket URI
-/// for the VM service. If the URI is already a VM Service WebSocket URI it
-/// will not be modified.
-Uri getVmServiceUriFromObservatoryUri(Uri uri) {
-  final isSecure = uri.isScheme('wss') || uri.isScheme('https');
-  final scheme = isSecure ? 'wss' : 'ws';
-
-  final path = uri.path.endsWith('/ws')
-      ? uri.path
-      : (uri.path.endsWith('/') ? '${uri.path}ws' : '${uri.path}/ws');
-
-  return uri.replace(scheme: scheme, path: path);
-}
-
 /// A typedef to represent a function taking no arguments and with no return
 /// value.
 typedef VoidFunction = void Function();
diff --git a/packages/devtools/pubspec.yaml b/packages/devtools/pubspec.yaml
index 3e9e88532f85..026bf6de5d55 100644
--- a/packages/devtools/pubspec.yaml
+++ b/packages/devtools/pubspec.yaml
@@ -24,7 +24,7 @@ dependencies:
   pedantic: ^1.4.0
   platform_detect: ^1.3.5
   rxdart: ^0.21.0
-  vm_service_lib: ^3.14.3-dev.4
+  vm_service_lib: ^3.15.1+1
   # We would use local dependencies for these packages if pub publish allowed it.
   octicons_css:
     ^0.0.1
diff --git a/packages/devtools/test/support/cli_test_driver.dart b/packages/devtools/test/support/cli_test_driver.dart
index 20f842defd97..858960bf4f50 100644
--- a/packages/devtools/test/support/cli_test_driver.dart
+++ b/packages/devtools/test/support/cli_test_driver.dart
@@ -6,8 +6,8 @@ import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 
-import 'package:devtools/src/utils.dart';
 import 'package:devtools/src/vm_service_wrapper.dart';
+import 'package:vm_service_lib/utils.dart';
 import 'package:vm_service_lib/vm_service_lib.dart';
 import 'package:vm_service_lib/vm_service_lib_io.dart';
 
@@ -105,7 +105,7 @@ class CliAppFixture extends AppFixture {
     }
 
     // Map to WS URI.
-    uri = getVmServiceUriFromObservatoryUri(uri);
+    uri = convertToWebSocketUrl(serviceProtocolUrl: uri);
 
     final VmServiceWrapper serviceConnection =
         VmServiceWrapper(await vmServiceConnectUri(uri.toString()));
diff --git a/packages/devtools/test/support/flutter_test_driver.dart b/packages/devtools/test/support/flutter_test_driver.dart
index 448020ecc8d7..9daa44450d08 100644
--- a/packages/devtools/test/support/flutter_test_driver.dart
+++ b/packages/devtools/test/support/flutter_test_driver.dart
@@ -6,9 +6,9 @@ import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 
-import 'package:devtools/src/utils.dart';
 import 'package:devtools/src/vm_service_wrapper.dart';
 import 'package:pedantic/pedantic.dart';
+import 'package:vm_service_lib/utils.dart';
 import 'package:vm_service_lib/vm_service_lib.dart';
 import 'package:vm_service_lib/vm_service_lib_io.dart';
 
@@ -324,7 +324,8 @@ class FlutterRunTestDriver extends FlutterTestDriver {
       _vmServiceWsUri = Uri.parse(wsUriString);
 
       // Map to WS URI.
-      _vmServiceWsUri = getVmServiceUriFromObservatoryUri(_vmServiceWsUri);
+      _vmServiceWsUri =
+          convertToWebSocketUrl(serviceProtocolUrl: _vmServiceWsUri);
 
       vmService = VmServiceWrapper(
         await vmServiceConnectUri(_vmServiceWsUri.toString()),
diff --git a/packages/devtools_server/lib/src/server.dart b/packages/devtools_server/lib/src/server.dart
index 41c1c6bd0458..b8dd7e2a7371 100644
--- a/packages/devtools_server/lib/src/server.dart
+++ b/packages/devtools_server/lib/src/server.dart
@@ -13,6 +13,7 @@ import 'package:path/path.dart' as path;
 import 'package:shelf/shelf.dart' as shelf;
 import 'package:shelf/shelf_io.dart' as shelf;
 import 'package:shelf_static/shelf_static.dart';
+import 'package:vm_service_lib/utils.dart';
 import 'package:vm_service_lib/vm_service_lib.dart' hide Isolate;
 
 import 'chrome.dart';
@@ -235,7 +236,7 @@ Future<void> registerLaunchDevToolsService(
 
 Future<VmService> _connectToVmService(Uri uri) async {
   // Fix up the various acceptable URI formats into a WebSocket URI to connect.
-  uri = getVmServiceUriFromObservatoryUri(uri);
+  uri = convertToWebSocketUrl(serviceProtocolUrl: uri);
 
   final WebSocket ws = await WebSocket.connect(uri.toString());
 
@@ -269,20 +270,3 @@ void printOutput(
 }) {
   print(machineMode ? jsonEncode(json) : message);
 }
-
-/// Map the URI (which may already be Observatory web app) to a WebSocket URI
-/// for the VM service.
-///
-/// If the URI is already a VM Service WebSocket URI it will not be modified.
-Uri getVmServiceUriFromObservatoryUri(Uri uri) {
-  // TODO(dantup): We have two copies of this and should move it to vm_service_lib
-  // then switch to that.
-  final isSecure = uri.isScheme('wss') || uri.isScheme('https');
-  final scheme = isSecure ? 'wss' : 'ws';
-
-  final path = uri.path.endsWith('/ws')
-      ? uri.path
-      : (uri.path.endsWith('/') ? '${uri.path}ws' : '${uri.path}/ws');
-
-  return uri.replace(scheme: scheme, path: path);
-}
diff --git a/packages/devtools_server/pubspec.yaml b/packages/devtools_server/pubspec.yaml
index f38ed7bad607..13d4fdd90a2e 100644
--- a/packages/devtools_server/pubspec.yaml
+++ b/packages/devtools_server/pubspec.yaml
@@ -16,5 +16,5 @@ dependencies:
   pedantic: ^1.4.0
   shelf: ^0.7.4
   shelf_static: ^0.2.8
-  vm_service_lib: ^3.14.3-dev.4
+  vm_service_lib: ^3.15.1+1
   webkit_inspection_protocol: ^0.4.0