diff --git a/CHANGELOG.md b/CHANGELOG.md
index de0ddd810..5356b748c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - Fixed an issue where template insertion occurred below the intended line, it now correctly inserts at the current line.
+- Fixed `:ObsidianOpen` issue on WSL OS name identifier check with different release name case.
 
 ## [v3.7.8](https://github.com/epwalsh/obsidian.nvim/releases/tag/v3.7.8) - 2024-04-09
 
diff --git a/lua/obsidian/util.lua b/lua/obsidian/util.lua
index 9c482a8d1..5c31de273 100644
--- a/lua/obsidian/util.lua
+++ b/lua/obsidian/util.lua
@@ -437,9 +437,9 @@ util.get_os = function()
   if vim.fn.has "win32" == 1 then
     this_os = util.OSType.Windows
   else
-    local sysname = vim.loop.os_uname().sysname
-    local release = vim.loop.os_uname().release
-    if sysname == "Linux" and string.find(release, "microsoft") then
+    local sysname = vim.loop.os_uname().sysname:lower()
+    local release = vim.loop.os_uname().release:lower()
+    if sysname == "linux" and string.find(release, "microsoft") then
       this_os = util.OSType.Wsl
     else
       this_os = sysname