diff --git a/Sources/LanguageServerProtocol/Client.swift b/Sources/LanguageServerProtocol/Client.swift
index 69c1f5a..d2be4e1 100644
--- a/Sources/LanguageServerProtocol/Client.swift
+++ b/Sources/LanguageServerProtocol/Client.swift
@@ -29,9 +29,9 @@ extension Registration {
 
             return .workspaceDidChangeWatchedFiles(options)
         case .workspaceDidChangeConfiguration:
-            throw ServerError.unhandledMethod(method)
+            return .workspaceDidChangeConfiguration
         case .workspaceDidChangeWorkspaceFolders:
-            throw ServerError.unhandledMethod(method)
+            return .workspaceDidChangeWorkspaceFolders
         case .textDocumentSemanticTokens:
             let options = try reintrepretOptions(SemanticTokensRegistrationOptions.self)
 
diff --git a/Sources/LanguageServerProtocol/LanguageServerProtocol.swift b/Sources/LanguageServerProtocol/LanguageServerProtocol.swift
index 2a9b796..444b40b 100644
--- a/Sources/LanguageServerProtocol/LanguageServerProtocol.swift
+++ b/Sources/LanguageServerProtocol/LanguageServerProtocol.swift
@@ -221,6 +221,8 @@ public enum ServerRegistration {
 
     case workspaceDidChangeWatchedFiles(DidChangeWatchedFilesRegistrationOptions)
     case textDocumentSemanticTokens(SemanticTokensRegistrationOptions)
+    case workspaceDidChangeConfiguration
+    case workspaceDidChangeWorkspaceFolders
 
     public var method: Method {
         switch self {
@@ -228,6 +230,10 @@ public enum ServerRegistration {
             return .workspaceDidChangeWatchedFiles
         case .textDocumentSemanticTokens:
             return .textDocumentSemanticTokens
+        case .workspaceDidChangeConfiguration:
+            return .workspaceDidChangeConfiguration
+        case .workspaceDidChangeWorkspaceFolders:
+            return .workspaceDidChangeWorkspaceFolders
         }
     }
 }