diff --git a/pkgs/applications/misc/projectlibre/default.nix b/pkgs/applications/misc/projectlibre/default.nix
index 344c3d7168a..2a7a82bc74a 100644
--- a/pkgs/applications/misc/projectlibre/default.nix
+++ b/pkgs/applications/misc/projectlibre/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    homepage = "http://www.projectlibre.com/";
+    homepage = "https://www.projectlibre.com/";
     description = "Project-Management Software similar to MS-Project";
     maintainers = [ maintainers.Mogria ];
     license = licenses.cpal10;
diff --git a/pkgs/applications/radio/noaa-apt/default.nix b/pkgs/applications/radio/noaa-apt/default.nix
index a81f2ea8f7d..01dc7b5c30d 100644
--- a/pkgs/applications/radio/noaa-apt/default.nix
+++ b/pkgs/applications/radio/noaa-apt/default.nix
@@ -56,7 +56,7 @@ rustPlatform.buildRustPackage rec {
 
   meta = with lib; {
     description = "NOAA APT image decoder";
-    homepage = "http://noaa-apt.mbernardi.com.ar/";
+    homepage = "https://noaa-apt.mbernardi.com.ar/";
     license = licenses.gpl3Only;
     maintainers = with maintainers; [ trepetti ];
     platforms = platforms.all;
diff --git a/pkgs/applications/science/logic/z3/4.4.0.nix b/pkgs/applications/science/logic/z3/4.4.0.nix
index 1e3bcea42ef..a5388572db6 100644
--- a/pkgs/applications/science/logic/z3/4.4.0.nix
+++ b/pkgs/applications/science/logic/z3/4.4.0.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "A high-performance theorem prover and SMT solver";
-    homepage    = "http://github.com/Z3Prover/z3";
+    homepage    = "https://github.com/Z3Prover/z3";
     license     = stdenv.lib.licenses.mit;
     platforms   = stdenv.lib.platforms.x86_64;
     maintainers = with stdenv.lib.maintainers; [ thoughtpolice ttuegel ];
diff --git a/pkgs/development/node-packages/node-packages.nix b/pkgs/development/node-packages/node-packages.nix
index 064d06d0ac2..bbec98b42cc 100644
--- a/pkgs/development/node-packages/node-packages.nix
+++ b/pkgs/development/node-packages/node-packages.nix
@@ -91339,7 +91339,7 @@ in
     buildInputs = globalBuildInputs;
     meta = {
       description = "Production process manager for Node.JS applications with a built-in load balancer.";
-      homepage = http://pm2.keymetrics.io/;
+      homepage = "https://pm2.keymetrics.io/";
       license = "AGPL-3.0";
     };
     production = true;
diff --git a/pkgs/development/python-modules/larch/default.nix b/pkgs/development/python-modules/larch/default.nix
index a94b076ded3..3be8b240419 100644
--- a/pkgs/development/python-modules/larch/default.nix
+++ b/pkgs/development/python-modules/larch/default.nix
@@ -23,7 +23,7 @@ buildPythonPackage rec {
   doCheck = false;
 
   meta = with stdenv.lib; {
-    homepage = "http://liw.fi/larch/";
+    homepage = "https://liw.fi/larch/";
     description = "Python B-tree library";
     license = licenses.gpl3;
     maintainers = [];
diff --git a/pkgs/development/python-modules/pure-eval/default.nix b/pkgs/development/python-modules/pure-eval/default.nix
index 2807611f493..6e504951cdb 100644
--- a/pkgs/development/python-modules/pure-eval/default.nix
+++ b/pkgs/development/python-modules/pure-eval/default.nix
@@ -22,7 +22,7 @@ buildPythonPackage rec {
 
   meta = with lib; {
     description = "Safely evaluate AST nodes without side effects";
-    homepage = "http://github.com/alexmojaki/pure_eval";
+    homepage = "https://github.com/alexmojaki/pure_eval";
     license = licenses.mit;
     maintainers = with maintainers; [ gebner ];
   };
diff --git a/pkgs/development/tools/rust/cargo-embed/default.nix b/pkgs/development/tools/rust/cargo-embed/default.nix
index a9c18b021bf..e4c5d8ab48c 100644
--- a/pkgs/development/tools/rust/cargo-embed/default.nix
+++ b/pkgs/development/tools/rust/cargo-embed/default.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
 
   meta = with lib; {
     description = "A cargo extension for working with microcontrollers";
-    homepage = "http://probe.rs/";
+    homepage = "https://probe.rs/";
     license = with licenses; [ asl20 /* or */ mit ];
     maintainers = with maintainers; [ fooker ];
   };
diff --git a/pkgs/development/tools/rust/cargo-flash/default.nix b/pkgs/development/tools/rust/cargo-flash/default.nix
index e5d23c9258c..dbd79f179aa 100644
--- a/pkgs/development/tools/rust/cargo-flash/default.nix
+++ b/pkgs/development/tools/rust/cargo-flash/default.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
 
   meta = with lib; {
     description = "A cargo extension for working with microcontrollers";
-    homepage = "http://probe.rs/";
+    homepage = "https://probe.rs/";
     license = with licenses; [ asl20 /* or */ mit ];
     maintainers = with maintainers; [ fooker ];
   };
diff --git a/pkgs/servers/irc/ircd-hybrid/default.nix b/pkgs/servers/irc/ircd-hybrid/default.nix
index 8b65c7870f9..5499d2bb8cb 100644
--- a/pkgs/servers/irc/ircd-hybrid/default.nix
+++ b/pkgs/servers/irc/ircd-hybrid/default.nix
@@ -21,6 +21,6 @@ stdenv.mkDerivation rec {
   meta = {
     description = "An IPv6-capable IRC server";
     platforms = stdenv.lib.platforms.unix;
-    homepage = "http://www.ircd-hybrid.org/";
+    homepage = "https://www.ircd-hybrid.org/";
   };
 }
diff --git a/pkgs/servers/smcroute/default.nix b/pkgs/servers/smcroute/default.nix
index e725e6243f0..b881c600730 100644
--- a/pkgs/servers/smcroute/default.nix
+++ b/pkgs/servers/smcroute/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Static multicast routing daemon";
-    homepage = "http://troglobit.com/smcroute.html";
+    homepage = "https://troglobit.com/smcroute.html";
     license = licenses.gpl2Plus;
     maintainers = with maintainers; [ fpletz ];
     platforms = with platforms; (linux ++ freebsd ++ netbsd ++ openbsd);
diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index 8c869d43b39..21df060b96d 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -861,7 +861,7 @@ let
       sha256 = "530d59ef0c0935f9862d187187a2d7583b12c639bb67db14f983322b161892d9";
     };
     meta = {
-      homepage = "http://github.com/timj/perl-Astro-FITS-Header/tree/master";
+      homepage = "https://github.com/timj/perl-Astro-FITS-Header/tree/master";
       description = "Object-oriented interface to FITS HDUs";
       license = stdenv.lib.licenses.free;
     };
@@ -1314,7 +1314,7 @@ let
     buildInputs = [ FileSlurp ];
     propagatedBuildInputs = [ ClassLoad DirSelf FileShareDir ModulePluggable MooseXGetopt namespaceclean  ];
     meta = {
-      homepage = "http://metacpan.org/release/Bot-Training";
+      homepage = "https://metacpan.org/release/Bot-Training";
       description = "Plain text training material for bots like Hailo and AI::MegaHAL";
       license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
     };
@@ -1330,7 +1330,7 @@ let
     buildInputs = [ FileShareDirInstall ];
     propagatedBuildInputs = [ BotTraining ];
     meta = {
-      homepage = "http://metacpan.org/release/Bot-Training-MegaHAL";
+      homepage = "https://metacpan.org/release/Bot-Training-MegaHAL";
       description = "Provide megahal.trn via Bot::Training";
       license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
     };
@@ -1346,7 +1346,7 @@ let
     buildInputs = [ FileShareDirInstall ];
     propagatedBuildInputs = [ BotTraining ];
     meta = {
-      homepage = "http://metacpan.org/release/Bot-Training-StarCraft";
+      homepage = "https://metacpan.org/release/Bot-Training-StarCraft";
       description = "Provide starcraft.trn via Bot::Training";
       license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
     };