diff --git a/pkgs/applications/graphics/phototonic/default.nix b/pkgs/applications/graphics/phototonic/default.nix
index 8ce9d407aade..ce300eaf9f6d 100644
--- a/pkgs/applications/graphics/phototonic/default.nix
+++ b/pkgs/applications/graphics/phototonic/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "An image viewer and organizer";
-    homepage = http://oferkv.github.io/phototonic/;
+    homepage = https://sourceforge.net/projects/phototonic/;
     license = licenses.gpl3;
     platforms = platforms.linux;
     maintainers = with maintainers; [ pSub ];
diff --git a/pkgs/applications/misc/viking/default.nix b/pkgs/applications/misc/viking/default.nix
index 7f4adeb2be87..5af675a82acf 100644
--- a/pkgs/applications/misc/viking/default.nix
+++ b/pkgs/applications/misc/viking/default.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation rec {
       on the map, make new tracks and waypoints, see real-time GPS
       position, etc.
     '';
-    homepage = http://viking.sourceforge.net/;
+    homepage = https://sourceforge.net/projects/viking/;
     license = licenses.gpl2Plus;
     maintainers = with maintainers; [ pSub ];
     platforms = with platforms; linux;
diff --git a/pkgs/development/libraries/dotconf/default.nix b/pkgs/development/libraries/dotconf/default.nix
index efadff6a1138..a2b2e08fd622 100644
--- a/pkgs/development/libraries/dotconf/default.nix
+++ b/pkgs/development/libraries/dotconf/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "A configuration parser library";
     maintainers = with maintainers; [ pSub ];
-    homepage = http://www.azzit.de/dotconf/;
+    homepage = https://github.com/williamh/dotconf;
     license = licenses.lgpl21Plus;
     platforms = with platforms; unix;
   };
diff --git a/pkgs/development/tools/parsing/ragel/default.nix b/pkgs/development/tools/parsing/ragel/default.nix
index 02a13bfa28dc..66895fb7fd3e 100644
--- a/pkgs/development/tools/parsing/ragel/default.nix
+++ b/pkgs/development/tools/parsing/ragel/default.nix
@@ -25,7 +25,7 @@ let
       doCheck = true;
 
       meta = with stdenv.lib; {
-        homepage = http://www.complang.org/ragel;
+        homepage = https://www.colm.net/open-source/ragel/;
         description = "State machine compiler";
         inherit license;
         platforms = platforms.unix;
diff --git a/pkgs/misc/screensavers/xlockmore/default.nix b/pkgs/misc/screensavers/xlockmore/default.nix
index 998e40554649..ddb4235c5dba 100644
--- a/pkgs/misc/screensavers/xlockmore/default.nix
+++ b/pkgs/misc/screensavers/xlockmore/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
 
   meta = with lib; {
     description = "Screen locker for the X Window System";
-    homepage = http://www.tux.org/~bagleyd/xlockmore.html;
+    homepage = http://sillycycle.com/xlockmore.html;
     license = licenses.gpl2;
     maintainers = with maintainers; [ pSub ];
     platforms = platforms.linux;
diff --git a/pkgs/tools/misc/ncdu/default.nix b/pkgs/tools/misc/ncdu/default.nix
index c309c8229747..1cb71ce9dd67 100644
--- a/pkgs/tools/misc/ncdu/default.nix
+++ b/pkgs/tools/misc/ncdu/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Ncurses disk usage analyzer";
-    homepage = http://dev.yorhel.nl/ncdu;
+    homepage = https://dev.yorhel.nl/ncdu;
     license = licenses.mit;
     platforms = platforms.all;
     maintainers = with maintainers; [ pSub ];
diff --git a/pkgs/tools/misc/rrdtool/default.nix b/pkgs/tools/misc/rrdtool/default.nix
index ee5c37ef6bb1..671dba0d548b 100644
--- a/pkgs/tools/misc/rrdtool/default.nix
+++ b/pkgs/tools/misc/rrdtool/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    homepage = http://oss.oetiker.ch/rrdtool/;
+    homepage = https://oss.oetiker.ch/rrdtool/;
     description = "High performance logging in Round Robin Databases";
     license = licenses.gpl2;
     platforms = platforms.linux ++ platforms.darwin;
diff --git a/pkgs/tools/misc/vorbisgain/default.nix b/pkgs/tools/misc/vorbisgain/default.nix
index 567783f63138..1c108af27f88 100644
--- a/pkgs/tools/misc/vorbisgain/default.nix
+++ b/pkgs/tools/misc/vorbisgain/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    homepage = http://sjeng.org/vorbisgain.html;
+    homepage = https://sjeng.org/vorbisgain.html;
     description = "A utility that corrects the volume of an Ogg Vorbis file to a predefined standardized loudness";
     license = licenses.gpl2;
     platforms = platforms.linux;
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 9e2277254b11..f4a7f9996ebb 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -9082,7 +9082,7 @@ in {
 
     meta = {
       description = "A command-line tool that helps you clean up Git branches";
-      homepage = http://lab.arc90.com/2012/04/03/git-sweep/;
+      homepage = https://github.com/arc90/git-sweep;
       license = licenses.mit;
       maintainers = with maintainers; [ pSub ];
     };