diff --git a/slow/slow.py b/slow/slow.py
index fd32716..1e6a8f9 100644
--- a/slow/slow.py
+++ b/slow/slow.py
@@ -69,7 +69,7 @@ class App:
         for m in iter:
             name = m[1]
             re_temp = re.sub(
-                m[0], r"(?P<" + name + r">[a-zA-Z0-9\-._~/:%&=]+)", re_temp
+                m[0], r"(?P<" + name + r">[a-zA-Z0-9\-._~:%&=]+)", re_temp
             )
         return re.compile(re_temp)