diff --git a/mcp-core/src/main/java/io/modelcontextprotocol/spec/McpSchema.java b/mcp-core/src/main/java/io/modelcontextprotocol/spec/McpSchema.java
index 12835a57a..f56cf65c9 100644
--- a/mcp-core/src/main/java/io/modelcontextprotocol/spec/McpSchema.java
+++ b/mcp-core/src/main/java/io/modelcontextprotocol/spec/McpSchema.java
@@ -1064,8 +1064,8 @@ public UnsubscribeRequest(String uri) {
 	 * The contents of a specific resource or sub-resource.
 	 */
 	@JsonTypeInfo(use = JsonTypeInfo.Id.DEDUCTION)
-	@JsonSubTypes({ @JsonSubTypes.Type(value = TextResourceContents.class, name = "text"),
-			@JsonSubTypes.Type(value = BlobResourceContents.class, name = "blob") })
+	@JsonSubTypes({ @JsonSubTypes.Type(value = TextResourceContents.class),
+			@JsonSubTypes.Type(value = BlobResourceContents.class) })
 	public sealed interface ResourceContents extends Meta permits TextResourceContents, BlobResourceContents {
 
 		/**