diff --git a/Readme.md b/Readme.md
index a078496..0407517 100644
--- a/Readme.md
+++ b/Readme.md
@@ -16,45 +16,54 @@ In your vim/neovim, run command:
 
 Almost same as VSCode.
 
-* Support javascript & typescript and jsx/tsx.
-* Install typings automatically.
-* Commands to work with tsserver, including:
-  * `tsserver.reloadProjects`
-  * `tsserver.openTsServerLog`
-  * `tsserver.goToProjectConfig`
-  * `tsserver.restart`
-  * `tsserver.format`
-  * `tsserver.organizeImports`
-  * `tsserver.watchBuild`
-* Code completion support.
-* Go to definition.
-* Code validation.
-* Document highlight.
-* Document symbols of current buffer.
-* Folding and folding range of current buffer.
-* Format current buffer, range format and format on type.
-* Hover for documentation.
-* Implementations codeLens and references codeLens.
-* Organize imports command.
-* Quickfix using code actions.
-* Code refactor using code actions.
-* Find references.
-* Signature help.
-* Rename symbols support.
-* Rename imports on file rename.
-* Search for workspace symbols.
+- Support javascript & typescript and jsx/tsx.
+- Install typings automatically.
+- Commands to work with tsserver, including:
+  - `tsserver.reloadProjects`
+  - `tsserver.openTsServerLog`
+  - `tsserver.goToProjectConfig`
+  - `tsserver.restart`
+  - `tsserver.format`
+  - `tsserver.organizeImports`
+  - `tsserver.watchBuild`
+- Code completion support.
+- Go to definition.
+- Code validation.
+- Document highlight.
+- Document symbols of current buffer.
+- Folding and folding range of current buffer.
+- Format current buffer, range format and format on type.
+- Hover for documentation.
+- Implementations codeLens and references codeLens.
+- Organize imports command.
+- Quickfix using code actions.
+- Code refactor using code actions.
+- Find references.
+- Signature help.
+- Rename symbols support.
+- Rename imports on file rename.
+- Search for workspace symbols.
 
 Tsserver module is resolved from local workspace, if not found, bundled tsserver
 module would be used.
 
 ## Configuration options
 
-* `tsserver.enable` set to `false` to disable tsserver language server.
-* `tsserver.trace.server` trace LSP traffic in output channel.
+- `tsserver.enable` set to `false` to disable tsserver language server.
+- `tsserver.trace.server` trace LSP traffic in output channel.
 
 And many more, which are same as VSCode, trigger completion in your
 `coc-settings.json` to get full list.
 
+## Trouble shooting
+
+To get the log of tsserver:
+
+- Add `"tsserver.log": "verbose"` to your `coc-settings.json` (opened by command
+  `:CocConfig`)
+- Make the issue happens.
+- Open the log file by command `:call CocAction('runCommand', 'tsserver.openTsServerLog')`
+
 ## License
 
 MIT
diff --git a/src/index.ts b/src/index.ts
index 9a984b4..0bb2bee 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -4,7 +4,7 @@ import { Command, OpenTsServerLogCommand, ReloadProjectsCommand, TypeScriptGoToP
 
 export async function activate(context: ExtensionContext): Promise<void> {
   let { subscriptions } = context
-  const config = workspace.getConfiguration().get('tsserver', {}) as any
+  const config = workspace.getConfiguration().get<any>('tsserver', {})
   if (!config.enable) return
   const service = new TsserverService()
 
@@ -27,6 +27,7 @@ export async function activate(context: ExtensionContext): Promise<void> {
   registCommand(commands.register({
     id: 'tsserver.restart',
     execute: (): void => {
+      // tslint:disable-next-line:no-floating-promises
       service.stop().then(() => {
         setTimeout(() => {
           service.restart()