diff --git a/doc/wsl.md b/doc/wsl.md
new file mode 100644
index 0000000..c85f61f
--- /dev/null
+++ b/doc/wsl.md
@@ -0,0 +1,14 @@
+```markdown
+# port number and host number
+RUBY_DEBUG_PORT=45555 RUBY_DEBUG_HOST=0.0.0.0 rdbg
+```
+
+```markdown
+# host number only
+RUBY_DEBUG_HOST=0.0.0.0 rdbg
+```
+
+```markdown
+# port number
+RUBY_DEBUG_PORT=45555
+```
\ No newline at end of file
diff --git a/lua/neoruby-debugger.lua b/lua/neoruby-debugger.lua
index f03d83c..1eba128 100644
--- a/lua/neoruby-debugger.lua
+++ b/lua/neoruby-debugger.lua
@@ -376,6 +376,20 @@ local function setup_rdbg_configuration(dap)
     localfs = true,
     waiting = 1000,
   },
+  {
+    type = 'ruby',
+    name = 'wsl2 run current file : prototype',
+    request = 'attach',
+    command = 'ruby',
+    script = "${file}",
+    port = 38698,
+    server = '0.0.0.0',
+    options = {
+     source_filetype = 'ruby';
+    },
+    localfs = true,
+    waiting = 1000,
+  },
 }
 
   if configs == nil or configs.dap_configurations == nil then