diff --git a/coc-extension/index.js b/coc-extension/index.js
index d3a3ed3..88ae8c5 100644
--- a/coc-extension/index.js
+++ b/coc-extension/index.js
@@ -21,7 +21,7 @@ exports.activate = async context => {
 		if (!languages.hasProvider('foldingRange', textDocument)) {
 			await wait(500)
 			if (!languages.hasProvider('foldingRange', textDocument)) {
-				throw new Error('UfoFallbackException')
+				throw 'UfoFallbackException'
 			}
 		}
 		await doc.synchronize()
diff --git a/lua/ufo/fold/init.lua b/lua/ufo/fold/init.lua
index 3287ca1..4ff3c9c 100644
--- a/lua/ufo/fold/init.lua
+++ b/lua/ufo/fold/init.lua
@@ -110,7 +110,7 @@ function Fold.update(bufnr)
         if not dispose(false) then
             return
         end
-        error(err)
+        promise.reject(err)
     end)
 end
 
diff --git a/lua/ufo/provider/init.lua b/lua/ufo/provider/init.lua
index 7b27b3e..bfed340 100644
--- a/lua/ufo/provider/init.lua
+++ b/lua/ufo/provider/init.lua
@@ -45,7 +45,7 @@ function Provider:requestFoldingRange(providers, bufnr)
                 return {main, nil}
             end
         else
-            error(reason)
+            return promise.reject(reason)
         end
     end)
     if log.isEnabled('debug') then
diff --git a/package.json b/package.json
index 7ab248c..efc06e1 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
 	"main": "coc-extension/index.js",
 	"type": "commonjs",
 	"engines": {
-		"coc": "^0.0.81"
+		"coc": "^0.0.82"
 	},
 	"activationEvents": [
 		"*"