diff --git a/package-lock.json b/package-lock.json
index 857881d..4938441 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -26,7 +26,7 @@
         "eslint-plugin-import": "^2.29.1",
         "eslint-plugin-n": "^17.9.0",
         "prettier": "^3.2.5",
-        "typescript": "^5.5.4"
+        "typescript": "~5.5.4"
       },
       "engines": {
         "node": ">=16",
@@ -4166,10 +4166,11 @@
       }
     },
     "node_modules/typescript": {
-      "version": "5.6.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.6.2.tgz",
-      "integrity": "sha512-NW8ByodCSNCwZeghjN3o+JX5OFH0Ojg6sadjEKY4huZ52TqbJTJnDo5+Tw98lSy63NZvi4n+ez5m2u5d4PkZyw==",
+      "version": "5.5.4",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.5.4.tgz",
+      "integrity": "sha512-Mtq29sKDAEYP7aljRgtPOpTvOfbwRWlS6dPRzwjdE+C0R4brX/GUyhHSecbHMFLNBLcJIPt9nl9yG5TZ1weH+Q==",
       "dev": true,
+      "license": "Apache-2.0",
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"
@@ -4406,7 +4407,7 @@
         "@types/react-dom": "^18.3.0",
         "esbuild": "^0.24.0",
         "prettier": "^3.3.2",
-        "typescript": "^5.5.4"
+        "typescript": "~5.5.4"
       }
     }
   }
diff --git a/package.json b/package.json
index c6f7ef0..e51ac32 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "eslint-plugin-import": "^2.29.1",
     "eslint-plugin-n": "^17.9.0",
     "prettier": "^3.2.5",
-    "typescript": "^5.5.4"
+    "typescript": "~5.5.4"
   },
   "dependencies": {
     "@types/jasmine": "^5.1.4",
diff --git a/packages/connect-playwright-example/package.json b/packages/connect-playwright-example/package.json
index 122de0e..d9a9d76 100644
--- a/packages/connect-playwright-example/package.json
+++ b/packages/connect-playwright-example/package.json
@@ -23,7 +23,7 @@
     "@types/react-dom": "^18.3.0",
     "esbuild": "^0.24.0",
     "prettier": "^3.3.2",
-    "typescript": "^5.5.4"
+    "typescript": "~5.5.4"
   },
   "dependencies": {
     "@connectrpc/connect-playwright": "^0.4.0",
diff --git a/packages/connect-playwright-example/src/App.tsx b/packages/connect-playwright-example/src/App.tsx
index 3532063..3034537 100644
--- a/packages/connect-playwright-example/src/App.tsx
+++ b/packages/connect-playwright-example/src/App.tsx
@@ -13,11 +13,7 @@
 // limitations under the License.
 
 import { useCallback, useState, FormEvent, FC } from "react";
-import {
-  ConnectError,
-  createPromiseClient,
-  PromiseClient,
-} from "@connectrpc/connect";
+import { ConnectError, createClient, Client } from "@connectrpc/connect";
 import {
   createGrpcWebTransport,
   createConnectTransport,
@@ -30,7 +26,7 @@ interface ChatMessage {
 }
 
 const baseUrl = "https://demo.connectrpc.com";
-let elizaClient: PromiseClient<typeof ElizaService>;
+let elizaClient: Client<typeof ElizaService>;
 
 // Read the transport and format parameters from the URL
 // Note that users do not need to worry about this since this is just for
@@ -41,7 +37,7 @@ const transportParam = params.get("transport");
 const useBinaryFormat = params.get("format") === "binary";
 
 if (transportParam === "grpcweb") {
-  elizaClient = createPromiseClient(
+  elizaClient = createClient(
     ElizaService,
     createGrpcWebTransport({
       baseUrl,
@@ -49,7 +45,7 @@ if (transportParam === "grpcweb") {
     }),
   );
 } else {
-  elizaClient = createPromiseClient(
+  elizaClient = createClient(
     ElizaService,
     createConnectTransport({
       baseUrl,
diff --git a/packages/connect-playwright/src/testdata/gen/test_pb.ts b/packages/connect-playwright/src/testdata/gen/test_pb.ts
index f41b275..89a56d8 100644
--- a/packages/connect-playwright/src/testdata/gen/test_pb.ts
+++ b/packages/connect-playwright/src/testdata/gen/test_pb.ts
@@ -18,21 +18,14 @@
 
 import type { GenFile, GenService } from "@bufbuild/protobuf/codegenv1";
 import { fileDesc, serviceDesc } from "@bufbuild/protobuf/codegenv1";
-import type {
-  Int32ValueSchema,
-  StringValueSchema,
-} from "@bufbuild/protobuf/wkt";
+import type { Int32ValueSchema, StringValueSchema } from "@bufbuild/protobuf/wkt";
 import { file_google_protobuf_wrappers } from "@bufbuild/protobuf/wkt";
 
 /**
  * Describes the file test.proto.
  */
-export const file_test: GenFile =
-  /*@__PURE__*/
-  fileDesc(
-    "Cgp0ZXN0LnByb3RvEgR0ZXN0MusBCgtUZXN0U2VydmljZRJFCghVbmFyeU9uZRIbLmdvb2dsZS5wcm90b2J1Zi5JbnQzMlZhbHVlGhwuZ29vZ2xlLnByb3RvYnVmLlN0cmluZ1ZhbHVlEkUKCFVuYXJ5VHdvEhsuZ29vZ2xlLnByb3RvYnVmLkludDMyVmFsdWUaHC5nb29nbGUucHJvdG9idWYuU3RyaW5nVmFsdWUSTgoPU2VydmVyU3RyZWFtaW5nEhsuZ29vZ2xlLnByb3RvYnVmLkludDMyVmFsdWUaHC5nb29nbGUucHJvdG9idWYuU3RyaW5nVmFsdWUwAWIGcHJvdG8z",
-    [file_google_protobuf_wrappers],
-  );
+export const file_test: GenFile = /*@__PURE__*/
+  fileDesc("Cgp0ZXN0LnByb3RvEgR0ZXN0MusBCgtUZXN0U2VydmljZRJFCghVbmFyeU9uZRIbLmdvb2dsZS5wcm90b2J1Zi5JbnQzMlZhbHVlGhwuZ29vZ2xlLnByb3RvYnVmLlN0cmluZ1ZhbHVlEkUKCFVuYXJ5VHdvEhsuZ29vZ2xlLnByb3RvYnVmLkludDMyVmFsdWUaHC5nb29nbGUucHJvdG9idWYuU3RyaW5nVmFsdWUSTgoPU2VydmVyU3RyZWFtaW5nEhsuZ29vZ2xlLnByb3RvYnVmLkludDMyVmFsdWUaHC5nb29nbGUucHJvdG9idWYuU3RyaW5nVmFsdWUwAWIGcHJvdG8z", [file_google_protobuf_wrappers]);
 
 /**
  * @generated from service test.TestService
@@ -45,7 +38,7 @@ export const TestService: GenService<{
     methodKind: "unary";
     input: typeof Int32ValueSchema;
     output: typeof StringValueSchema;
-  };
+  },
   /**
    * @generated from rpc test.TestService.UnaryTwo
    */
@@ -53,7 +46,7 @@ export const TestService: GenService<{
     methodKind: "unary";
     input: typeof Int32ValueSchema;
     output: typeof StringValueSchema;
-  };
+  },
   /**
    * @generated from rpc test.TestService.ServerStreaming
    */
@@ -61,5 +54,7 @@ export const TestService: GenService<{
     methodKind: "server_streaming";
     input: typeof Int32ValueSchema;
     output: typeof StringValueSchema;
-  };
-}> = /*@__PURE__*/ serviceDesc(file_test, 0);
+  },
+}> = /*@__PURE__*/
+  serviceDesc(file_test, 0);
+