diff --git a/internal/adapter/yamlls/initization.go b/internal/adapter/yamlls/initization.go
index 396b6ae..26dc1fb 100644
--- a/internal/adapter/yamlls/initization.go
+++ b/internal/adapter/yamlls/initization.go
@@ -19,6 +19,46 @@ func (yamllsConnector Connector) CallInitialize(ctx context.Context, workspaceUR
 		ClientInfo: &lsp.ClientInfo{
 			Name: "helm-ls",
 		},
+		Capabilities: lsp.ClientCapabilities{
+			Workspace: &lsp.WorkspaceClientCapabilities{},
+			TextDocument: &lsp.TextDocumentClientCapabilities{
+				Synchronization:   &lsp.TextDocumentSyncClientCapabilities{},
+				Completion:        &lsp.CompletionTextDocumentClientCapabilities{},
+				Hover:             &lsp.HoverTextDocumentClientCapabilities{},
+				SignatureHelp:     &lsp.SignatureHelpTextDocumentClientCapabilities{},
+				Declaration:       &lsp.DeclarationTextDocumentClientCapabilities{},
+				Definition:        &lsp.DefinitionTextDocumentClientCapabilities{},
+				TypeDefinition:    &lsp.TypeDefinitionTextDocumentClientCapabilities{},
+				Implementation:    &lsp.ImplementationTextDocumentClientCapabilities{},
+				References:        &lsp.ReferencesTextDocumentClientCapabilities{},
+				DocumentHighlight: &lsp.DocumentHighlightClientCapabilities{},
+				DocumentSymbol: &lsp.DocumentSymbolClientCapabilities{
+					DynamicRegistration:               false,
+					SymbolKind:                        &lsp.SymbolKindCapabilities{},
+					HierarchicalDocumentSymbolSupport: true,
+					TagSupport:                        &lsp.DocumentSymbolClientCapabilitiesTagSupport{},
+					LabelSupport:                      false,
+				},
+				CodeAction:         &lsp.CodeActionClientCapabilities{},
+				CodeLens:           &lsp.CodeLensClientCapabilities{},
+				DocumentLink:       &lsp.DocumentLinkClientCapabilities{},
+				ColorProvider:      &lsp.DocumentColorClientCapabilities{},
+				Formatting:         &lsp.DocumentFormattingClientCapabilities{},
+				RangeFormatting:    &lsp.DocumentRangeFormattingClientCapabilities{},
+				OnTypeFormatting:   &lsp.DocumentOnTypeFormattingClientCapabilities{},
+				PublishDiagnostics: &lsp.PublishDiagnosticsClientCapabilities{},
+				Rename:             &lsp.RenameClientCapabilities{},
+				FoldingRange:       &lsp.FoldingRangeClientCapabilities{},
+				SelectionRange:     &lsp.SelectionRangeClientCapabilities{},
+				CallHierarchy:      &lsp.CallHierarchyClientCapabilities{},
+				SemanticTokens:     &lsp.SemanticTokensClientCapabilities{},
+				LinkedEditingRange: &lsp.LinkedEditingRangeClientCapabilities{},
+				Moniker:            &lsp.MonikerClientCapabilities{},
+			},
+			Window:       &lsp.WindowClientCapabilities{},
+			General:      &lsp.GeneralClientCapabilities{},
+			Experimental: nil,
+		},
 	}
 
 	_, err := yamllsConnector.server.Initialize(ctx, &params)
diff --git a/internal/adapter/yamlls/symbol.go b/internal/adapter/yamlls/symbol.go
new file mode 100644
index 0000000..3ea128b
--- /dev/null
+++ b/internal/adapter/yamlls/symbol.go
@@ -0,0 +1,15 @@
+package yamlls
+
+import (
+	"context"
+
+	lsp "go.lsp.dev/protocol"
+)
+
+func (yamllsConnector Connector) CallDocumentSymbol(ctx context.Context, params *lsp.DocumentSymbolParams) (result []interface{}, err error) {
+	if yamllsConnector.server == nil {
+		return []interface{}{}, nil
+	}
+
+	return yamllsConnector.server.DocumentSymbol(ctx, params)
+}
diff --git a/internal/handler/handler.go b/internal/handler/handler.go
index ac86b4f..6ad1a42 100644
--- a/internal/handler/handler.go
+++ b/internal/handler/handler.go
@@ -130,12 +130,6 @@ func (h *langHandler) DocumentLinkResolve(ctx context.Context, params *lsp.Docum
 	return nil, nil
 }
 
-// DocumentSymbol implements protocol.Server.
-func (h *langHandler) DocumentSymbol(ctx context.Context, params *lsp.DocumentSymbolParams) (result []interface{}, err error) {
-	logger.Error("Document symbol unimplemented")
-	return nil, nil
-}
-
 // ExecuteCommand implements protocol.Server.
 func (h *langHandler) ExecuteCommand(ctx context.Context, params *lsp.ExecuteCommandParams) (result interface{}, err error) {
 	logger.Error("Execute command unimplemented")
diff --git a/internal/handler/initialization.go b/internal/handler/initialization.go
index 1828e67..a98076e 100644
--- a/internal/handler/initialization.go
+++ b/internal/handler/initialization.go
@@ -36,17 +36,15 @@ func (h *langHandler) Initialize(ctx context.Context, params *lsp.InitializePara
 			TextDocumentSync: lsp.TextDocumentSyncOptions{
 				Change:    lsp.TextDocumentSyncKindIncremental,
 				OpenClose: true,
-				Save: &lsp.SaveOptions{
-					IncludeText: true,
-				},
 			},
 			CompletionProvider: &lsp.CompletionOptions{
 				TriggerCharacters: []string{".", "$."},
 				ResolveProvider:   false,
 			},
-			HoverProvider:      true,
-			DefinitionProvider: true,
-			ReferencesProvider: true,
+			HoverProvider:          true,
+			DefinitionProvider:     true,
+			ReferencesProvider:     true,
+			DocumentSymbolProvider: true,
 		},
 	}, nil
 }
diff --git a/internal/handler/symbol.go b/internal/handler/symbol.go
new file mode 100644
index 0000000..29886bd
--- /dev/null
+++ b/internal/handler/symbol.go
@@ -0,0 +1,12 @@
+package handler
+
+import (
+	"context"
+
+	lsp "go.lsp.dev/protocol"
+)
+
+// DocumentSymbol implements protocol.Server.
+func (h *langHandler) DocumentSymbol(ctx context.Context, params *lsp.DocumentSymbolParams) (result []interface{}, err error) {
+	return h.yamllsConnector.CallDocumentSymbol(ctx, params)
+}