diff --git a/pkgs/tools/graphics/pgf/default.nix b/pkgs/tools/graphics/pgf/default.nix
index 88684541fcc6..d3f01fa7d1f0 100644
--- a/pkgs/tools/graphics/pgf/default.nix
+++ b/pkgs/tools/graphics/pgf/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation {
 # configureFlags = optional static "--enable-static --disable-shared";
 
   meta = {
-    homepage = "http://www.libpgf.org/";
+    homepage = "https://www.libpgf.org/";
     description = "Progressive Graphics Format command line program";
     license = stdenv.lib.licenses.lgpl21Plus;
     platforms = stdenv.lib.platforms.linux;