diff --git a/.vscode/launch.json b/.vscode/launch.json
index 3ba84cd21..c23af9d7f 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -30,7 +30,7 @@
 			"type": "lua",
 			"request": "attach",
 			"stopOnEntry": true,
-			"address": "127.0.0.1:11413",
+			"address": "127.0.0.1:11427",
 			"outputCapture": [
 			],
 			"sourceMaps": [
diff --git a/changelog.md b/changelog.md
index 7b74d910a..2847f76d2 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,6 +1,7 @@
 # changelog
 
 ## 2.0.4
+* `FIX` [#539](https://github.com/sumneko/lua-language-server/issues/539)
 * `FIX` [#550](https://github.com/sumneko/lua-language-server/issues/550)
 
 ## 2.0.3
diff --git a/script/core/completion.lua b/script/core/completion.lua
index 2975634c9..97984299b 100644
--- a/script/core/completion.lua
+++ b/script/core/completion.lua
@@ -1172,7 +1172,7 @@ local function tryWord(ast, text, offset, triggerCharacter, results)
     if not word then
         if triggerCharacter == nil then
             word = ''
-            start = offset
+            start = offset + 1
         else
             return nil
         end