diff --git a/client/package.json b/client/package.json
index 87d6667..40fa35a 100644
--- a/client/package.json
+++ b/client/package.json
@@ -22,7 +22,7 @@
     "preview": "vite preview"
   },
   "dependencies": {
-    "@modelcontextprotocol/sdk": "*",
+    "@modelcontextprotocol/sdk": "0.5.0",
     "@radix-ui/react-icons": "^1.3.0",
     "@radix-ui/react-label": "^2.1.0",
     "@radix-ui/react-select": "^2.1.2",
diff --git a/client/src/App.tsx b/client/src/App.tsx
index 23c3b87..ad53b77 100644
--- a/client/src/App.tsx
+++ b/client/src/App.tsx
@@ -357,10 +357,21 @@ const App = () => {
 
   const connectMcpServer = async () => {
     try {
-      const client = new Client({
-        name: "mcp-inspector",
-        version: "0.0.1",
-      });
+      const client = new Client(
+        {
+          name: "mcp-inspector",
+          version: "0.0.1",
+        },
+        {
+          capabilities: {
+            // Support all client capabilities since we're an inspector tool
+            sampling: {},
+            roots: {
+              listChanged: true,
+            },
+          },
+        },
+      );
 
       const backendUrl = new URL("http://localhost:3000/sse");
 
diff --git a/client/src/components/ToolsTab.tsx b/client/src/components/ToolsTab.tsx
index db0209d..5aede27 100644
--- a/client/src/components/ToolsTab.tsx
+++ b/client/src/components/ToolsTab.tsx
@@ -41,11 +41,12 @@ const ToolsTab = ({
 
     if ("content" in toolResult) {
       const structuredResult = toolResult as CallToolResult;
+      const isError = structuredResult.isError ?? false;
 
       return (
         <>
           <h4 className="font-semibold mb-2">
-            Tool Result: {structuredResult.isError ? "Error" : "Success"}
+            Tool Result: {isError ? "Error" : "Success"}
           </h4>
           {structuredResult.content.map((item, index) => (
             <div key={index} className="mb-2">
diff --git a/package-lock.json b/package-lock.json
index 3d7cef7..090645e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -28,7 +28,7 @@
       "version": "0.1.0",
       "license": "MIT",
       "dependencies": {
-        "@modelcontextprotocol/sdk": "*",
+        "@modelcontextprotocol/sdk": "0.5.0",
         "@radix-ui/react-icons": "^1.3.0",
         "@radix-ui/react-label": "^2.1.0",
         "@radix-ui/react-select": "^2.1.2",
@@ -864,9 +864,9 @@
       "link": true
     },
     "node_modules/@modelcontextprotocol/sdk": {
-      "version": "0.4.0",
-      "resolved": "https://registry.npmjs.org/@modelcontextprotocol/sdk/-/sdk-0.4.0.tgz",
-      "integrity": "sha512-79gx8xh4o9YzdbtqMukOe5WKzvEZpvBA1x8PAgJWL7J5k06+vJx8NK2kWzOazPgqnfDego7cNEO8tjai/nOPAA==",
+      "version": "0.5.0",
+      "resolved": "https://registry.npmjs.org/@modelcontextprotocol/sdk/-/sdk-0.5.0.tgz",
+      "integrity": "sha512-RXgulUX6ewvxjAG0kOpLMEdXXWkzWgaoCGaA2CwNW7cQCIphjpJhjpHSiaPdVCnisjRF/0Cm9KWHUuIoeiAblQ==",
       "dependencies": {
         "content-type": "^1.0.5",
         "raw-body": "^3.0.0",
@@ -5868,7 +5868,7 @@
       "version": "0.1.0",
       "license": "MIT",
       "dependencies": {
-        "@modelcontextprotocol/sdk": "*",
+        "@modelcontextprotocol/sdk": "0.5.0",
         "cors": "^2.8.5",
         "eventsource": "^2.0.2",
         "express": "^4.21.0",
diff --git a/server/package.json b/server/package.json
index 22e9387..a2b1112 100644
--- a/server/package.json
+++ b/server/package.json
@@ -28,7 +28,7 @@
     "typescript": "^5.6.2"
   },
   "dependencies": {
-    "@modelcontextprotocol/sdk": "*",
+    "@modelcontextprotocol/sdk": "0.5.0",
     "cors": "^2.8.5",
     "eventsource": "^2.0.2",
     "express": "^4.21.0",