diff --git a/lapce-proxy/src/dispatch.rs b/lapce-proxy/src/dispatch.rs
index e5146a40..b7f1fac1 100644
--- a/lapce-proxy/src/dispatch.rs
+++ b/lapce-proxy/src/dispatch.rs
@@ -1130,6 +1130,21 @@ fn handle_request(&mut self, id: RequestId, rpc: ProxyRequest) {
                         proxy_rpc.handle_response(id, result);
                     });
             }
+            LspFoldingRange { path } => {
+                let proxy_rpc = self.proxy_rpc.clone();
+                self.catalog_rpc.get_lsp_folding_range(
+                    &path,
+                    move |plugin_id, result| {
+                        let result = result.map(|resp| {
+                            ProxyResponse::LspFoldingRangeResponse {
+                                plugin_id,
+                                resp,
+                            }
+                        });
+                        proxy_rpc.handle_response(id, result);
+                    },
+                );
+            }
             GetCodeLensResolve { code_lens, path } => {
                 let proxy_rpc = self.proxy_rpc.clone();
                 self.catalog_rpc.get_code_lens_resolve(
diff --git a/lapce-proxy/src/plugin/mod.rs b/lapce-proxy/src/plugin/mod.rs
index 677c3c49..590f9de6 100644
--- a/lapce-proxy/src/plugin/mod.rs
+++ b/lapce-proxy/src/plugin/mod.rs
@@ -35,12 +35,12 @@
     request::{
         CallHierarchyIncomingCalls, CallHierarchyPrepare, CodeActionRequest,
         CodeActionResolveRequest, CodeLensRequest, CodeLensResolve, Completion,
-        DocumentSymbolRequest, Formatting, GotoDefinition, GotoImplementation,
-        GotoImplementationResponse, GotoTypeDefinition, GotoTypeDefinitionParams,
-        GotoTypeDefinitionResponse, HoverRequest, InlayHintRequest,
-        InlineCompletionRequest, PrepareRenameRequest, References, Rename, Request,
-        ResolveCompletionItem, SelectionRangeRequest, SemanticTokensFullRequest,
-        SignatureHelpRequest, WorkspaceSymbolRequest,
+        DocumentSymbolRequest, FoldingRangeRequest, Formatting, GotoDefinition,
+        GotoImplementation, GotoImplementationResponse, GotoTypeDefinition,
+        GotoTypeDefinitionParams, GotoTypeDefinitionResponse, HoverRequest,
+        InlayHintRequest, InlineCompletionRequest, PrepareRenameRequest, References,
+        Rename, Request, ResolveCompletionItem, SelectionRangeRequest,
+        SemanticTokensFullRequest, SignatureHelpRequest, WorkspaceSymbolRequest,
     },
     CallHierarchyClientCapabilities, CallHierarchyIncomingCall,
     CallHierarchyIncomingCallsParams, CallHierarchyItem, CallHierarchyPrepareParams,
@@ -51,10 +51,11 @@
     CompletionItem, CompletionItemCapability,
     CompletionItemCapabilityResolveSupport, CompletionParams, CompletionResponse,
     Diagnostic, DocumentFormattingParams, DocumentSymbolClientCapabilities,
-    DocumentSymbolParams, DocumentSymbolResponse, FormattingOptions, GotoCapability,
-    GotoDefinitionParams, GotoDefinitionResponse, Hover, HoverClientCapabilities,
-    HoverParams, InlayHint, InlayHintClientCapabilities, InlayHintParams,
-    InlineCompletionClientCapabilities, InlineCompletionParams,
+    DocumentSymbolParams, DocumentSymbolResponse, FoldingRange,
+    FoldingRangeClientCapabilities, FoldingRangeParams, FormattingOptions,
+    GotoCapability, GotoDefinitionParams, GotoDefinitionResponse, Hover,
+    HoverClientCapabilities, HoverParams, InlayHint, InlayHintClientCapabilities,
+    InlayHintParams, InlineCompletionClientCapabilities, InlineCompletionParams,
     InlineCompletionResponse, InlineCompletionTriggerKind, Location, MarkupKind,
     MessageActionItemCapabilities, ParameterInformationSettings,
     PartialResultParams, Position, PrepareRenameResponse,
@@ -698,6 +699,35 @@ pub fn get_references(
         );
     }
 
+    pub fn get_lsp_folding_range(
+        &self,
+        path: &Path,
+        cb: impl FnOnce(
+                PluginId,
+                std::result::Result<Option<Vec<FoldingRange>>, RpcError>,
+            ) + Clone
+            + Send
+            + 'static,
+    ) {
+        let uri = Url::from_file_path(path).unwrap();
+        let method = FoldingRangeRequest::METHOD;
+        let params = FoldingRangeParams {
+            text_document: TextDocumentIdentifier { uri },
+            work_done_progress_params: WorkDoneProgressParams::default(),
+            partial_result_params: PartialResultParams::default(),
+        };
+
+        let language_id =
+            Some(language_id_from_path(path).unwrap_or("").to_string());
+        self.send_request_to_all_plugins(
+            method,
+            params,
+            language_id,
+            Some(path.to_path_buf()),
+            cb,
+        );
+    }
+
     pub fn go_to_implementation(
         &self,
         path: &Path,
@@ -1727,6 +1757,13 @@ fn client_capabilities() -> ClientCapabilities {
                 hierarchical_document_symbol_support: Some(true),
                 ..Default::default()
             }),
+            folding_range: Some(FoldingRangeClientCapabilities {
+                dynamic_registration: Some(false),
+                range_limit: None,
+                line_folding_only: Some(false),
+                folding_range_kind: None,
+                folding_range: None,
+            }),
             ..Default::default()
         }),
         window: Some(WindowClientCapabilities {
diff --git a/lapce-proxy/src/plugin/psp.rs b/lapce-proxy/src/plugin/psp.rs
index 4c385e4f..1f78c0de 100644
--- a/lapce-proxy/src/plugin/psp.rs
+++ b/lapce-proxy/src/plugin/psp.rs
@@ -31,18 +31,18 @@
     request::{
         CallHierarchyIncomingCalls, CallHierarchyPrepare, CodeActionRequest,
         CodeActionResolveRequest, CodeLensRequest, CodeLensResolve, Completion,
-        DocumentSymbolRequest, Formatting, GotoDefinition, GotoImplementation,
-        GotoTypeDefinition, HoverRequest, Initialize, InlayHintRequest,
-        InlineCompletionRequest, PrepareRenameRequest, References,
+        DocumentSymbolRequest, FoldingRangeRequest, Formatting, GotoDefinition,
+        GotoImplementation, GotoTypeDefinition, HoverRequest, Initialize,
+        InlayHintRequest, InlineCompletionRequest, PrepareRenameRequest, References,
         RegisterCapability, Rename, ResolveCompletionItem, SelectionRangeRequest,
         SemanticTokensFullRequest, SignatureHelpRequest, WorkDoneProgressCreate,
         WorkspaceSymbolRequest,
     },
     CancelParams, CodeActionProviderCapability, DidChangeTextDocumentParams,
-    DidSaveTextDocumentParams, DocumentSelector, HoverProviderCapability,
-    ImplementationProviderCapability, InitializeResult, LogMessageParams,
-    MessageType, OneOf, ProgressParams, PublishDiagnosticsParams, Range,
-    Registration, RegistrationParams, SemanticTokens, SemanticTokensLegend,
+    DidSaveTextDocumentParams, DocumentSelector, FoldingRangeProviderCapability,
+    HoverProviderCapability, ImplementationProviderCapability, InitializeResult,
+    LogMessageParams, MessageType, OneOf, ProgressParams, PublishDiagnosticsParams,
+    Range, Registration, RegistrationParams, SemanticTokens, SemanticTokensLegend,
     SemanticTokensServerCapabilities, ServerCapabilities, ShowMessageParams,
     TextDocumentContentChangeEvent, TextDocumentIdentifier,
     TextDocumentSaveRegistrationOptions, TextDocumentSyncCapability,
@@ -781,6 +781,22 @@ pub fn method_registered(&mut self, method: &str) -> bool {
                     }
                 })
                 .unwrap_or(false),
+            FoldingRangeRequest::METHOD => self
+                .server_capabilities
+                .folding_range_provider
+                .as_ref()
+                .map(|r| match r {
+                    FoldingRangeProviderCapability::Simple(support) => *support,
+                    FoldingRangeProviderCapability::FoldingProvider(_) => {
+                        // todo
+                        true
+                    }
+                    FoldingRangeProviderCapability::Options(_) => {
+                        // todo
+                        true
+                    }
+                })
+                .unwrap_or(false),
             CodeActionRequest::METHOD => self
                 .server_capabilities
                 .code_action_provider
diff --git a/lapce-rpc/src/proxy.rs b/lapce-rpc/src/proxy.rs
index 0b756daa..7bbf6407 100644
--- a/lapce-rpc/src/proxy.rs
+++ b/lapce-rpc/src/proxy.rs
@@ -13,7 +13,7 @@
 use lsp_types::{
     request::{GotoImplementationResponse, GotoTypeDefinitionResponse},
     CallHierarchyIncomingCall, CallHierarchyItem, CodeAction, CodeActionResponse,
-    CodeLens, CompletionItem, Diagnostic, DocumentSymbolResponse,
+    CodeLens, CompletionItem, Diagnostic, DocumentSymbolResponse, FoldingRange,
     GotoDefinitionResponse, Hover, InlayHint, InlineCompletionResponse,
     InlineCompletionTriggerKind, Location, Position, PrepareRenameResponse,
     SelectionRange, SymbolInformation, TextDocumentItem, TextEdit, WorkspaceEdit,
@@ -134,6 +134,9 @@ pub enum ProxyRequest {
     GetSemanticTokens {
         path: PathBuf,
     },
+    LspFoldingRange {
+        path: PathBuf,
+    },
     PrepareRename {
         path: PathBuf,
         position: Position,
@@ -399,6 +402,10 @@ pub enum ProxyResponse {
         plugin_id: PluginId,
         resp: CodeActionResponse,
     },
+    LspFoldingRangeResponse {
+        plugin_id: PluginId,
+        resp: Option<Vec<FoldingRange>>,
+    },
     GetCodeLensResponse {
         plugin_id: PluginId,
         resp: Option<Vec<CodeLens>>,
@@ -932,6 +939,14 @@ pub fn get_type_definition(
         );
     }
 
+    pub fn get_lsp_folding_range(
+        &self,
+        path: PathBuf,
+        f: impl ProxyCallback + 'static,
+    ) {
+        self.request_async(ProxyRequest::LspFoldingRange { path }, f);
+    }
+
     pub fn get_references(
         &self,
         path: PathBuf,