diff --git a/pkgs/development/libraries/librdf/rasqal.nix b/pkgs/development/libraries/librdf/rasqal.nix
index 93f08ec71315..7567a0624310 100644
--- a/pkgs/development/libraries/librdf/rasqal.nix
+++ b/pkgs/development/libraries/librdf/rasqal.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation (finalAttrs: {
   version = "0.9.33";
 
   src = fetchurl {
-    url = "http://download.librdf.org/source/rasqal-${finalAttrs.version}.tar.gz";
+    url = "https://download.librdf.org/source/rasqal-${finalAttrs.version}.tar.gz";
     sha256 = "0z6rrwn4jsagvarg8d5zf0j352kjgi33py39jqd29gbhcnncj939";
   };
 
diff --git a/pkgs/development/libraries/librdf/redland.nix b/pkgs/development/libraries/librdf/redland.nix
index 9420a6a203ab..fc210c8c4f43 100644
--- a/pkgs/development/libraries/librdf/redland.nix
+++ b/pkgs/development/libraries/librdf/redland.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
   version = "1.0.17";
 
   src = fetchurl {
-    url = "http://download.librdf.org/source/redland-${version}.tar.gz";
+    url = "https://download.librdf.org/source/redland-${version}.tar.gz";
     sha256 = "de1847f7b59021c16bdc72abb4d8e2d9187cd6124d69156f3326dd34ee043681";
   };