diff --git a/server/openmtc-server/src/openmtc_server/util/__init__.py b/server/openmtc-server/src/openmtc_server/util/__init__.py
index 7c9e6a2..91de583 100644
--- a/server/openmtc-server/src/openmtc_server/util/__init__.py
+++ b/server/openmtc-server/src/openmtc_server/util/__init__.py
@@ -27,7 +27,7 @@ aplus.log_error = log_error
 
 
 def uri_safe(s):
-    return quote(s.replace("/", "_"))
+    return quote(s.replace("/", "_"), safe='~')
 
 
 def is_text_content(mimetype):