diff --git a/server.rb b/server.rb
index 0bcd227..6d5e286 100755
--- a/server.rb
+++ b/server.rb
@@ -127,12 +127,12 @@ def get_part_by_id(id)
   end
   # add attachments
   part["attachments"] = []
-  dir = PUBLIC + "/" + ATTACHMENTS + "/" + part["name"]
+  dir = PUBLIC + "/" + ATTACHMENTS + "/" + part["name"].gsub("/", "_")
   if File.directory?(dir) then
     Dir.entries(dir).each do |file|
       path = dir + "/" + file
       next unless File.file? path
-      part["attachments"] << ATTACHMENTS + "/" + part["name"] + "/" + file
+      part["attachments"] << ATTACHMENTS + "/" + part["name"].gsub("/", "_") + "/" + file
     end
   end
   part["attachments"].sort!
@@ -429,7 +429,7 @@ get '/import/lcsc/:lcsc' do
   (part["attachments"] + [part["datasheet"]]).each do |attachment|
     next unless attachment
     file = attachment.split("/")[-1]
-    dir = PUBLIC + "/" + ATTACHMENTS + "/" + part["name"]
+    dir = PUBLIC + "/" + ATTACHMENTS + "/" + part["name"].gsub("/", "_")
     path = "#{dir}/#{i}_#{file}"
     i += 1
     unless File.file?(path) then