diff --git a/Formula/cweb.rb b/Formula/cweb.rb
index 77b9f63ba8..f04193c124 100644
--- a/Formula/cweb.rb
+++ b/Formula/cweb.rb
@@ -1,9 +1,8 @@
 class Cweb < Formula
   desc "Literate documentation system for C, C++, and Java"
   homepage "https://cs.stanford.edu/~knuth/cweb.html"
-  # curl: (9) Server denied you to change to the given directory
-  # ftp://ftp.cs.stanford.edu/pub/cweb/cweb-3.64b.tar.gz
-  url "https://www.ctan.org/tex-archive/web/c_cpp/cweb/cweb-3.64b.tar.gz"
+  url "https://cs.stanford.edu/pub/cweb/cweb-3.64b.tar.gz"
+  mirror "https://www.ctan.org/tex-archive/web/c_cpp/cweb/cweb-3.64b.tar.gz"
   sha256 "038b0bf4d8297f0a98051ca2b4664abbf9d72b0b67963a2c7700d2f11cd25595"
 
   bottle do