diff --git a/pkgs/by-name/bp/bpm-tools/package.nix b/pkgs/by-name/bp/bpm-tools/package.nix
index af2b096e731d..eb3cc603ac42 100644
--- a/pkgs/by-name/bp/bpm-tools/package.nix
+++ b/pkgs/by-name/bp/bpm-tools/package.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation (finalAttrs: {
   version = "0.3";
 
   src = fetchurl {
-    url = "http://www.pogo.org.uk/~mark/bpm-tools/releases/bpm-tools-${finalAttrs.version}.tar.gz";
+    url = "https://www.pogo.org.uk/~mark/bpm-tools/releases/bpm-tools-${finalAttrs.version}.tar.gz";
     sha256 = "151vfbs8h3cibs7kbdps5pqrsxhpjv16y2iyfqbxzsclylgfivrp";
   };