diff --git a/pkgs/by-name/bu/bupc/package.nix b/pkgs/by-name/bu/bupc/package.nix
index e25dbf1e111b..dbee20c4ae37 100644
--- a/pkgs/by-name/bu/bupc/package.nix
+++ b/pkgs/by-name/bu/bupc/package.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation (finalAttrs: {
   version = "2020.12.0";
 
   src = fetchurl {
-    url = "http://upc.lbl.gov/download/release/berkeley_upc-${finalAttrs.version}.tar.gz";
+    url = "https://upc.lbl.gov/download/release/berkeley_upc-${finalAttrs.version}.tar.gz";
     hash = "sha256-JdpFORlXHpCQE+TivoQQnjQlxQN7C8BNfHvTOSwXbYQ=";
   };