diff --git a/plugins/mcp/pom.xml b/plugins/mcp/pom.xml
index db198acd0..f5348e228 100644
--- a/plugins/mcp/pom.xml
+++ b/plugins/mcp/pom.xml
@@ -35,7 +35,7 @@
     <description>Model Context Protocol (MCP) plugin for Genkit - enables integration with MCP servers and tools</description>
 
     <properties>
-        <mcp.sdk.version>0.17.2</mcp.sdk.version>
+        <mcp.sdk.version>1.0.0</mcp.sdk.version>
         <maven.deploy.skip>false</maven.deploy.skip>
     </properties>
 
diff --git a/plugins/mcp/src/main/java/com/google/genkit/plugins/mcp/MCPClient.java b/plugins/mcp/src/main/java/com/google/genkit/plugins/mcp/MCPClient.java
index 5c6ad7676..3cf308a39 100644
--- a/plugins/mcp/src/main/java/com/google/genkit/plugins/mcp/MCPClient.java
+++ b/plugins/mcp/src/main/java/com/google/genkit/plugins/mcp/MCPClient.java
@@ -29,6 +29,7 @@
 import io.modelcontextprotocol.client.transport.HttpClientStreamableHttpTransport;
 import io.modelcontextprotocol.client.transport.ServerParameters;
 import io.modelcontextprotocol.client.transport.StdioClientTransport;
+import io.modelcontextprotocol.json.McpJsonDefaults;
 import io.modelcontextprotocol.json.McpJsonMapper;
 import io.modelcontextprotocol.spec.McpClientTransport;
 import io.modelcontextprotocol.spec.McpSchema;
@@ -299,7 +300,7 @@ public boolean isConnected() {
   // Private methods
 
   private McpClientTransport createTransport() {
-    McpJsonMapper jsonMapper = McpJsonMapper.getDefault();
+    McpJsonMapper jsonMapper = McpJsonDefaults.getMapper();
 
     switch (config.getTransportType()) {
       case STDIO:
diff --git a/plugins/mcp/src/main/java/com/google/genkit/plugins/mcp/MCPServer.java b/plugins/mcp/src/main/java/com/google/genkit/plugins/mcp/MCPServer.java
index 824892694..340b075ff 100644
--- a/plugins/mcp/src/main/java/com/google/genkit/plugins/mcp/MCPServer.java
+++ b/plugins/mcp/src/main/java/com/google/genkit/plugins/mcp/MCPServer.java
@@ -24,6 +24,7 @@
 import com.google.genkit.core.ActionType;
 import com.google.genkit.core.GenkitException;
 import com.google.genkit.core.Registry;
+import io.modelcontextprotocol.json.McpJsonDefaults;
 import io.modelcontextprotocol.json.McpJsonMapper;
 import io.modelcontextprotocol.server.McpServer;
 import io.modelcontextprotocol.server.McpServerFeatures;
@@ -75,7 +76,7 @@
 public class MCPServer {
 
   private static final Logger logger = LoggerFactory.getLogger(MCPServer.class);
-  private static final McpJsonMapper jsonMapper = McpJsonMapper.getDefault();
+  private static final McpJsonMapper jsonMapper = McpJsonDefaults.getMapper();
 
   private final Registry registry;
   private final MCPServerOptions options;