diff --git a/telegraf_pressure_stall.cr b/telegraf_pressure_stall.cr
index a010a04..b1a1208 100644
--- a/telegraf_pressure_stall.cr
+++ b/telegraf_pressure_stall.cr
@@ -1,8 +1,8 @@
-dir = ENV.fetch("PSI_DIR", "/proc/pressure")
+dir = Path[ENV.fetch("PSI_DIR", "/proc/pressure")]
 time = Time.local.to_s("%s%9N")
 
 Dir.children(dir).each do |ressource|
-  File.read_lines("#{dir}/#{ressource}").each do |line|
+  File.read_lines(dir/ressource).each do |line|
     parts = line.split
     type = parts[0]
     metrics = parts[1..-1].map{ |part| part.split('=')}.to_h