diff --git a/nushell/modules/pj_prompt.nu b/nushell/modules/pj_prompt.nu
index 317a3c4..62ea9b5 100644
--- a/nushell/modules/pj_prompt.nu
+++ b/nushell/modules/pj_prompt.nu
@@ -1,5 +1,5 @@
 def _pj_detect_os_key [] {
-    let host_name = (((sys host | get name?) | default ($nu.os-info.name? | default "")) | into string | str downcase)
+    let host_name = (((sys host | get name?) | default ($nu.os-info.name? | default "")) | into string | str lowercase)
     if ($host_name | str contains "darwin") {
         return "Macos"
     }
@@ -18,7 +18,7 @@ def _pj_detect_os_key [] {
     if ($os_release != "") {
         let id_line = (open $os_release | lines | where {|l| $l | str starts-with "ID=" } | get 0?)
         let id = if ($id_line == null) { "" } else { (($id_line | str replace "ID=" "") | str trim -c '"') }
-        match ($id | str downcase) {
+        match ($id | str lowercase) {
             "alpine" => "Alpine"
             "alma" => "AlmaLinux"
             "almalinux" => "AlmaLinux"
@@ -506,7 +506,7 @@ def _pj_git_branch_module [p: record, git: record] {
 #     # lowercase extensions is checked per-language below. glob is
 #     # case-insensitive on Windows, so *.CPP is matched by "cpp" too.
 #     let exts = (glob *.{c,h,cpp,cc,cxx,hpp,hh,hxx,rs,zig,py}
-#         | each {|f| $f | path parse | get extension | str downcase }
+#         | each {|f| $f | path parse | get extension | str lowercase }
 #         | uniq)
 #
 #     let has_c = ("c" in $exts or "h" in $exts)
@@ -585,7 +585,7 @@ def _pj_prompt_static_base [] {
 
     let host = (sys host | get hostname? | default "")
     let in_ssh = (($env.SSH_CONNECTION? | default "") != "" or ($env.SSH_TTY? | default "") != "")
-    # let prompt_newline = if (($nu.os-info.name | str downcase) == "windows") { "\n\r" } else { "\n\r" }
+    # let prompt_newline = if (($nu.os-info.name | str lowercase) == "windows") { "\n\r" } else { "\n\r" }
     let prompt_newline = "\n\r"
 
     {
diff --git a/nushell/modules/pj_uv.nu b/nushell/modules/pj_uv.nu
index 2ff2852..f53563b 100644
--- a/nushell/modules/pj_uv.nu
+++ b/nushell/modules/pj_uv.nu
@@ -1,5 +1,5 @@
 export def --env "pj uvthu" [] {
-    let os_name = ($nu.os-info.name? | default "" | into string | str downcase)
+    let os_name = ($nu.os-info.name? | default "" | into string | str lowercase)
     if not (($os_name | str contains "darwin") or ($os_name | str contains "macos")) {
         return
     }
diff --git a/nushell/modules/pj_zoxide.nu b/nushell/modules/pj_zoxide.nu
index 862e09b..6f0c3b2 100644
--- a/nushell/modules/pj_zoxide.nu
+++ b/nushell/modules/pj_zoxide.nu
@@ -42,7 +42,7 @@ export-env {
 #
 
 def _pj_normalize_windows_drive [path: string] {
-  if (($nu.os-info.name | str downcase) != "windows") {
+  if (($nu.os-info.name | str lowercase) != "windows") {
     return $path
   }
 
@@ -52,7 +52,7 @@ def _pj_normalize_windows_drive [path: string] {
   }
 
   let item = ($parsed | first)
-  $"(($item.drive | str upcase)):($item.rest)"
+  $"(($item.drive | str uppercase)):($item.rest)"
 }
 
 # Jump to a directory using only keywords.