diff --git a/packages/textlint/.vscode/tasks.json b/packages/textlint/.vscode/tasks.json
index 34395cf..c3085cd 100644
--- a/packages/textlint/.vscode/tasks.json
+++ b/packages/textlint/.vscode/tasks.json
@@ -6,12 +6,16 @@
 // ${fileExtname}: the current opened file's extension
 // ${cwd}: the current working directory of the spawned process
 // A task runner that calls a custom npm script that compiles the extension.
+
+// NOTE: We do not use `"type": "npm"` because VS Code may incorrectly choose the package manager.
+// cf. https://github.com/microsoft/vscode/issues/170101
 {
   "version": "2.0.0",
   "tasks": [
     {
-      "type": "npm",
-      "script": "tsc",
+      "label": "npm: tsc",
+      "type": "shell",
+      "command": "npm run tsc",
       "group": "build",
       "presentation": {
         "panel": "dedicated",
@@ -20,8 +24,9 @@
       "problemMatcher": ["$tsc", "$ts-webpack"]
     },
     {
-      "type": "npm",
-      "script": "watch",
+      "label": "npm: watch",
+      "type": "shell",
+      "command": "npm --prefix ${workspaceFolder}/../../ run watch",
       "isBackground": true,
       "group": {
         "kind": "build",
diff --git a/vscode-textlint.code-workspace b/vscode-textlint.code-workspace
index 335a36e..dd8e74b 100644
--- a/vscode-textlint.code-workspace
+++ b/vscode-textlint.code-workspace
@@ -37,7 +37,8 @@
       "editor.defaultFormatter": "esbenp.prettier-vscode",
       "editor.formatOnSave": true
     },
-    "typescript.tsdk": "./node_modules/typescript/lib"
+    "typescript.tsdk": "./node_modules/typescript/lib",
+    "npm.packageManager": "npm"
   },
   "extensions": {
     "recommendations": [