diff --git a/units/en/unit1/sdk.mdx b/units/en/unit1/sdk.mdx
index be5a8a8..ddb64f9 100644
--- a/units/en/unit1/sdk.mdx
+++ b/units/en/unit1/sdk.mdx
@@ -165,10 +165,13 @@ MCP is designed to be language-agnostic, and there are official SDKs available f
 | Python     | [github.com/modelcontextprotocol/python-sdk](https://github.com/modelcontextprotocol/python-sdk)         | Anthropic           | Active           |
 | Java       | [github.com/modelcontextprotocol/java-sdk](https://github.com/modelcontextprotocol/java-sdk)             | Spring AI (VMware)  | Active           |
 | Kotlin     | [github.com/modelcontextprotocol/kotlin-sdk](https://github.com/modelcontextprotocol/kotlin-sdk)         | JetBrains           | Active           |
-| C#         | [github.com/modelcontextprotocol/csharp-sdk](https://github.com/modelcontextprotocol/csharp-sdk)         | Microsoft           | Active (Preview) |
+| C#         | [github.com/modelcontextprotocol/csharp-sdk](https://github.com/modelcontextprotocol/csharp-sdk)         | Microsoft           | Active           |
 | Swift      | [github.com/modelcontextprotocol/swift-sdk](https://github.com/modelcontextprotocol/swift-sdk)           | loopwork-ai         | Active           |
 | Rust       | [github.com/modelcontextprotocol/rust-sdk](https://github.com/modelcontextprotocol/rust-sdk)             | Anthropic/Community | Active           |
 | Dart       | [https://github.com/leehack/mcp_dart](https://github.com/leehack/mcp_dart)                               | Flutter Community   | Active           |
+| Go         | [github.com/modelcontextprotocol/go-sdk](https://github.com/modelcontextprotocol/go-sdk)                 | Google              | Active           |
+| PHP        | [github.com/modelcontextprotocol/php-sdk](https://github.com/modelcontextprotocol/php-sdk)               | The PHP Foundation  | Active           |
+| Ruby       | [github.com/modelcontextprotocol/ruby-sdk](https://github.com/modelcontextprotocol/ruby-sdk)             | Shopify             | Active           |
 
 These SDKs provide language-specific abstractions that simplify working with the MCP protocol, allowing you to focus on implementing the core logic of your servers or clients rather than dealing with low-level protocol details.