diff --git a/pkgs/applications/altcoins/cryptop/default.nix b/pkgs/applications/altcoins/cryptop/default.nix
index a37ff5639d94..0136ab18ceac 100644
--- a/pkgs/applications/altcoins/cryptop/default.nix
+++ b/pkgs/applications/altcoins/cryptop/default.nix
@@ -16,7 +16,7 @@ python2.pkgs.buildPythonApplication rec {
   doCheck = false;
 
   meta = {
-    homepage = http://github.com/huwwp/cryptop;
+    homepage = https://github.com/huwwp/cryptop;
     description = "Command line Cryptocurrency Portfolio";
     license = with lib.licenses; [ mit ];
     maintainers = with lib.maintainers; [ bhipple ];
diff --git a/pkgs/applications/audio/amarok/default.nix b/pkgs/applications/audio/amarok/default.nix
index 3b675cd9020b..022e33991f98 100644
--- a/pkgs/applications/audio/amarok/default.nix
+++ b/pkgs/applications/audio/amarok/default.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation rec {
     repositories.git = git://anongit.kde.org/amarok.git;
     description = "Popular music player for KDE";
     license = "GPL";
-    homepage = http://amarok.kde.org;
+    homepage = https://amarok.kde.org;
     inherit (kdelibs4.meta) platforms;
   };
 }
diff --git a/pkgs/applications/audio/ponymix/default.nix b/pkgs/applications/audio/ponymix/default.nix
index ff688f7b3dc1..5cfbb7bf5a48 100644
--- a/pkgs/applications/audio/ponymix/default.nix
+++ b/pkgs/applications/audio/ponymix/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "CLI PulseAudio Volume Control";
-    homepage = http://github.com/falconindy/ponymix;
+    homepage = https://github.com/falconindy/ponymix;
     license = licenses.mit;
     platforms = platforms.linux;
     maintainers = with maintainers; [ ericsagnes ];
diff --git a/pkgs/applications/editors/emacs-modes/erlang/default.nix b/pkgs/applications/editors/emacs-modes/erlang/default.nix
index 496c79543a9c..463d7fc7e159 100644
--- a/pkgs/applications/editors/emacs-modes/erlang/default.nix
+++ b/pkgs/applications/editors/emacs-modes/erlang/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation {
   # emacs highlighting */
 
   meta = with stdenv.lib; {
-    homepage = http://github.com/erlang/otp;
+    homepage = https://github.com/erlang/otp;
     description = "Erlang mode for Emacs";
     license = licenses.asl20;
     platforms = platforms.unix;
diff --git a/pkgs/applications/editors/emacs-modes/haskell/default.nix b/pkgs/applications/editors/emacs-modes/haskell/default.nix
index 30917a41bd40..6f998300290a 100644
--- a/pkgs/applications/editors/emacs-modes/haskell/default.nix
+++ b/pkgs/applications/editors/emacs-modes/haskell/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation {
   installCheckTarget = "check";
 
   meta = {
-    homepage = http://github.com/haskell/haskell-mode;
+    homepage = https://github.com/haskell/haskell-mode;
     description = "Haskell mode for Emacs";
 
     platforms = stdenv.lib.platforms.unix;
diff --git a/pkgs/applications/editors/vis/default.nix b/pkgs/applications/editors/vis/default.nix
index 291c7b1b412d..eef1746ff380 100644
--- a/pkgs/applications/editors/vis/default.nix
+++ b/pkgs/applications/editors/vis/default.nix
@@ -59,7 +59,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "A vim like editor";
-    homepage = http://github.com/martanne/vis;
+    homepage = https://github.com/martanne/vis;
     license = licenses.isc;
     maintainers = with maintainers; [ vrthra ramkromberg ];
     platforms = platforms.unix;
diff --git a/pkgs/applications/graphics/pencil/default.nix b/pkgs/applications/graphics/pencil/default.nix
index 5b1f79a6c4fd..f7175f9d2b87 100644
--- a/pkgs/applications/graphics/pencil/default.nix
+++ b/pkgs/applications/graphics/pencil/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "GUI prototyping/mockup tool";
-    homepage = http://github.com/prikhi/pencil;
+    homepage = https://github.com/prikhi/pencil;
     license = licenses.gpl2; # Commercial license is also available
     maintainers = with maintainers; [ bjornfor prikhi ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/misc/milu/default.nix b/pkgs/applications/misc/milu/default.nix
index b8ccbe77cf5b..9f98376a51bc 100644
--- a/pkgs/applications/misc/milu/default.nix
+++ b/pkgs/applications/misc/milu/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Higher Order Mutation Testing Tool for C and C++ programs";
-    homepage = http://github.com/yuejia/Milu;
+    homepage = https://github.com/yuejia/Milu;
     license = stdenv.lib.licenses.bsd2;
     platforms = stdenv.lib.platforms.linux;
     maintainers = [ stdenv.lib.maintainers.vrthra ];
diff --git a/pkgs/applications/misc/opencpn/default.nix b/pkgs/applications/misc/opencpn/default.nix
index 01cebe959547..056649ad3d26 100644
--- a/pkgs/applications/misc/opencpn/default.nix
+++ b/pkgs/applications/misc/opencpn/default.nix
@@ -27,6 +27,6 @@ stdenv.mkDerivation rec {
     maintainers = [ stdenv.lib.maintainers.kragniz ];
     platforms = stdenv.lib.platforms.all;
     license = stdenv.lib.licenses.gpl2;
-    homepage = http://opencpn.org/;
+    homepage = https://opencpn.org/;
   };
 }
diff --git a/pkgs/applications/science/electronics/caneda/default.nix b/pkgs/applications/science/electronics/caneda/default.nix
index dc00cef88982..399815f943a8 100644
--- a/pkgs/applications/science/electronics/caneda/default.nix
+++ b/pkgs/applications/science/electronics/caneda/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Open source EDA software focused on easy of use and portability";
-    homepage = http://caneda.tuxfamily.org;
+    homepage = http://caneda.org;
     license = stdenv.lib.licenses.gpl2Plus;
     maintainers = with stdenv.lib.maintainers; [viric];
     platforms = with stdenv.lib.platforms; linux;
diff --git a/pkgs/applications/science/logic/acgtk/default.nix b/pkgs/applications/science/logic/acgtk/default.nix
index 94b292d65887..bd4ccea231b3 100644
--- a/pkgs/applications/science/logic/acgtk/default.nix
+++ b/pkgs/applications/science/logic/acgtk/default.nix
@@ -47,7 +47,7 @@ stdenv.mkDerivation {
                  + " " + optionalString installEmacsMode "install-emacs";
 
   meta = with stdenv.lib; {
-    homepage = http://www.loria.fr/equipes/calligramme/acg;
+    homepage = http://calligramme.loria.fr/acg/;
     description = "A toolkit for developing ACG signatures and lexicon";
     license = licenses.cecill20;
     platforms = ocaml.meta.platforms or [];
diff --git a/pkgs/applications/science/logic/z3/default.nix b/pkgs/applications/science/logic/z3/default.nix
index 9683579af475..a6b89f90ef67 100644
--- a/pkgs/applications/science/logic/z3/default.nix
+++ b/pkgs/applications/science/logic/z3/default.nix
@@ -23,7 +23,7 @@ in 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.unix;
     maintainers = [ stdenv.lib.maintainers.thoughtpolice ];
diff --git a/pkgs/applications/science/logic/z3_opt/default.nix b/pkgs/applications/science/logic/z3_opt/default.nix
index 1b989097758e..d3d63795d69b 100644
--- a/pkgs/applications/science/logic/z3_opt/default.nix
+++ b/pkgs/applications/science/logic/z3_opt/default.nix
@@ -37,7 +37,7 @@ in stdenv.mkDerivation rec {
 
   meta = {
     description = "A high-performance theorem prover and SMT solver, optimization edition";
-    homepage    = "http://github.com/Z3Prover/z3";
+    homepage    = "https://github.com/Z3Prover/z3";
     license     = stdenv.lib.licenses.mit;
     platforms   = stdenv.lib.platforms.unix;
     maintainers = with stdenv.lib.maintainers; [ thoughtpolice sheganinans ];
diff --git a/pkgs/applications/virtualization/cbfstool/default.nix b/pkgs/applications/virtualization/cbfstool/default.nix
index b7bbeb158c63..d02d78606545 100644
--- a/pkgs/applications/virtualization/cbfstool/default.nix
+++ b/pkgs/applications/virtualization/cbfstool/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Management utility for CBFS formatted ROM images";
-    homepage = http://www.coreboot.org;
+    homepage = https://www.coreboot.org;
     license = licenses.gpl2;
     maintainers = [ maintainers.tstrobel ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/window-managers/sxhkd/default.nix b/pkgs/applications/window-managers/sxhkd/default.nix
index b78b15f7914c..41a50668f19b 100644
--- a/pkgs/applications/window-managers/sxhkd/default.nix
+++ b/pkgs/applications/window-managers/sxhkd/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Simple X hotkey daemon";
-    homepage = http://github.com/baskerville/sxhkd/;
+    homepage = https://github.com/baskerville/sxhkd/;
     license = stdenv.lib.licenses.bsd2;
     platforms = stdenv.lib.platforms.linux;
   };
diff --git a/pkgs/applications/window-managers/trayer/default.nix b/pkgs/applications/window-managers/trayer/default.nix
index 146bd7e1438b..79c73d80789f 100644
--- a/pkgs/applications/window-managers/trayer/default.nix
+++ b/pkgs/applications/window-managers/trayer/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
   makeFlags = [ "PREFIX=$(out)" ];
 
   meta = with stdenv.lib; {
-    homepage = http://github.com/sargon/trayer-srg;
+    homepage = https://github.com/sargon/trayer-srg;
     license = licenses.mit;
     description = "A lightweight GTK2-based systray for UNIX desktop";
     platforms = platforms.linux;
diff --git a/pkgs/applications/window-managers/xmonad-log-applet/default.nix b/pkgs/applications/window-managers/xmonad-log-applet/default.nix
index f27e7a953dd2..906ba0efda24 100644
--- a/pkgs/applications/window-managers/xmonad-log-applet/default.nix
+++ b/pkgs/applications/window-managers/xmonad-log-applet/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
   patches = [ ./fix-paths.patch ];
 
   meta = with stdenv.lib; {
-    homepage = http://github.com/alexkay/xmonad-log-applet;
+    homepage = https://github.com/alexkay/xmonad-log-applet;
     license = licenses.bsd3;
     description = "An applet that will display XMonad log information (${desktopSupport} version)";
     platforms = platforms.linux;
diff --git a/pkgs/data/fonts/andagii/default.nix b/pkgs/data/fonts/andagii/default.nix
index 5c708457f8d2..ba0bab61eec5 100644
--- a/pkgs/data/fonts/andagii/default.nix
+++ b/pkgs/data/fonts/andagii/default.nix
@@ -18,7 +18,7 @@ in fetchzip {
   # package; but I cannot find the original source, so use it on your
   # own risk Debian claims it is GPL - good enough for me.
   meta = with stdenv.lib; {
-    homepage = http://www.i18nguy.com/unicode/unicode-font.HTML;
+    homepage = http://www.i18nguy.com/unicode/unicode-font.html;
     description = "Unicode Plane 1 Osmanya script font";
     maintainers = with maintainers; [ raskin rycee ];
     license = "unknown";
diff --git a/pkgs/data/icons/paper-icon-theme/default.nix b/pkgs/data/icons/paper-icon-theme/default.nix
index e0ea56831b4d..9e793caf9de8 100644
--- a/pkgs/data/icons/paper-icon-theme/default.nix
+++ b/pkgs/data/icons/paper-icon-theme/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Modern icon theme designed around bold colours and simple geometric shapes";
-    homepage = http://snwh.org/paper;
+    homepage = https://snwh.org/paper;
     license = with licenses; [ cc-by-sa-40 lgpl3 ];
     platforms = platforms.all;
     maintainers = with maintainers; [ romildo ];
diff --git a/pkgs/data/misc/poppler-data/default.nix b/pkgs/data/misc/poppler-data/default.nix
index 59f4724e1bee..f0f6505cb247 100644
--- a/pkgs/data/misc/poppler-data/default.nix
+++ b/pkgs/data/misc/poppler-data/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
   installFlags = [ "prefix=$(out)" ];
 
   meta = with stdenv.lib; {
-    homepage = http://poppler.freedesktop.org/;
+    homepage = https://poppler.freedesktop.org/;
     description = "Encoding files for Poppler, a PDF rendering library";
     platforms = platforms.all;
     license = licenses.free; # more free licenses combined
diff --git a/pkgs/development/beam-modules/hex-packages.nix b/pkgs/development/beam-modules/hex-packages.nix
index b77d5e6c589a..d8d55c011209 100644
--- a/pkgs/development/beam-modules/hex-packages.nix
+++ b/pkgs/development/beam-modules/hex-packages.nix
@@ -1182,7 +1182,7 @@ let
                                 systems to query, augment and transform data
                                 according to Elixir matching rules. '';
               license = stdenv.lib.licenses.mit;
-              homepage = "http://github.com/awetzel/adap";
+              homepage = "https://github.com/awetzel/adap";
             };
           } // packageOverrides)
       ) {};
@@ -6660,7 +6660,7 @@ let
                                 requests and responds to preflight requests
                                 (OPTIONS)'';
               license = stdenv.lib.licenses.asl20;
-              homepage = "http://github.com/mschae/cors_plug";
+              homepage = "https://github.com/mschae/cors_plug";
             };
           } // packageOverrides)
       ) {};
@@ -9498,7 +9498,7 @@ let
                                 H-metric are abstracted away - you provide them
                                 as functions.'';
               license = stdenv.lib.licenses.bsd3;
-              homepage = "http://github.com/herenowcoder/eastar";
+              homepage = "https://github.com/herenowcoder/eastar";
             };
           } // packageOverrides)
       ) {};
@@ -12266,7 +12266,7 @@ let
                                 response. This project is a rewrite for Elixir
                                 and Plug of basho webmachine.'';
               license = stdenv.lib.licenses.mit;
-              homepage = "http://github.com/awetzel/ewebmachine";
+              homepage = "https://github.com/awetzel/ewebmachine";
             };
           } // packageOverrides)
       ) {};
@@ -22613,7 +22613,7 @@ let
             meta = {
               description = ''JWT decoding library for Elixir'';
               license = stdenv.lib.licenses.mit;
-              homepage = "http://github.com/mschae/jwtex";
+              homepage = "https://github.com/mschae/jwtex";
             };
           } // packageOverrides)
       ) {};
@@ -30269,7 +30269,7 @@ let
                                 according to rfc7239 and fill `conn.remote_ip`
                                 with the root client ip.'';
               license = stdenv.lib.licenses.mit;
-              homepage = "http://github.com/awetzel/plug_forwarded_peer";
+              homepage = "https://github.com/awetzel/plug_forwarded_peer";
             };
           } // packageOverrides)
       ) {};
@@ -30472,7 +30472,7 @@ let
             meta = {
               description = ''An elixir plug that serves HTTP range requests'';
               license = stdenv.lib.licenses.mit;
-              homepage = "http://github.com/TheSquad/plug_range";
+              homepage = "https://github.com/TheSquad/plug_range";
             };
           } // packageOverrides)
       ) {};
@@ -36106,7 +36106,7 @@ let
                                 use a rails-like trailing format:
                                 http://api.dev/resources.format'';
               license = stdenv.lib.licenses.asl20;
-              homepage = "http://github.com/mschae/trailing_format_plug";
+              homepage = "https://github.com/mschae/trailing_format_plug";
             };
           } // packageOverrides)
       ) {};
@@ -38938,7 +38938,7 @@ let
             meta = {
               description = ''stream zip archives while building them'';
               license = stdenv.lib.licenses.bsd3;
-              homepage = "http://github.com/dgvncsz0f/zipflow";
+              homepage = "https://github.com/dgvncsz0f/zipflow";
             };
           } // packageOverrides)
       ) {};
diff --git a/pkgs/development/compilers/adobe-flex-sdk/default.nix b/pkgs/development/compilers/adobe-flex-sdk/default.nix
index 03cfee61ce48..ccb366ffe1cb 100644
--- a/pkgs/development/compilers/adobe-flex-sdk/default.nix
+++ b/pkgs/development/compilers/adobe-flex-sdk/default.nix
@@ -32,9 +32,9 @@ stdenv.mkDerivation rec {
     done
   '';
 
-  meta = { 
+  meta = {
     description = "Flex SDK for Adobe Flash / ActionScript";
-    homepage = "http://www.adobe.com/support/documentation/en/flex/3/releasenotes_flex3_sdk.html#installation";
+    homepage = "http://www.adobe.com/products/flex.html";
     license = stdenv.lib.licenses.mpl11;
     platforms = stdenv.lib.platforms.unix;
   };
diff --git a/pkgs/development/compilers/halvm/2.4.0.nix b/pkgs/development/compilers/halvm/2.4.0.nix
index dd81d780838c..b88ac73c7e40 100644
--- a/pkgs/development/compilers/halvm/2.4.0.nix
+++ b/pkgs/development/compilers/halvm/2.4.0.nix
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
   };
 
   meta = {
-    homepage = http://github.com/GaloisInc/HaLVM;
+    homepage = https://github.com/GaloisInc/HaLVM;
     description = "The Haskell Lightweight Virtual Machine (HaLVM): GHC running on Xen";
     platforms = ["x86_64-linux"];       # other platforms don't have Xen
     maintainers = with stdenv.lib.maintainers; [ dmjio ];
diff --git a/pkgs/development/compilers/rust/cargo.nix b/pkgs/development/compilers/rust/cargo.nix
index 2d4d6ad4db1f..ac4102c9a63c 100644
--- a/pkgs/development/compilers/rust/cargo.nix
+++ b/pkgs/development/compilers/rust/cargo.nix
@@ -47,7 +47,7 @@ rustPlatform.buildRustPackage rec {
   doCheck = false;
 
   meta = with stdenv.lib; {
-    homepage = http://crates.io;
+    homepage = https://crates.io;
     description = "Downloads your Rust project's dependencies and builds your project";
     maintainers = with maintainers; [ wizeman retrry ];
     license = [ licenses.mit licenses.asl20 ];
diff --git a/pkgs/development/libraries/accounts-qt/default.nix b/pkgs/development/libraries/accounts-qt/default.nix
index dc803bf1c375..e45a9f2f3871 100644
--- a/pkgs/development/libraries/accounts-qt/default.nix
+++ b/pkgs/development/libraries/accounts-qt/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Qt library for accessing the online accounts database";
-    homepage = http://code.google.com/p/accounts-sso/;
+    homepage = https://gitlab.com/accounts-sso;
     license = licenses.lgpl21;
     maintainers = with maintainers; [ nckx ];
     platforms = with platforms; linux;
diff --git a/pkgs/development/libraries/boolstuff/default.nix b/pkgs/development/libraries/boolstuff/default.nix
index 62d61e6cb5d5..0f899e4324c1 100644
--- a/pkgs/development/libraries/boolstuff/default.nix
+++ b/pkgs/development/libraries/boolstuff/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, pkgconfig }:
 
-let baseurl = "http://perso.b2b2c.ca/sarrazip/dev"; in
+let baseurl = "https://perso.b2b2c.ca/~sarrazip/dev"; in
 
 stdenv.mkDerivation rec {
   name = "boolstuff-0.1.15";
diff --git a/pkgs/development/libraries/c-ares/default.nix b/pkgs/development/libraries/c-ares/default.nix
index 025e11e0755b..14ff7a5f16c3 100644
--- a/pkgs/development/libraries/c-ares/default.nix
+++ b/pkgs/development/libraries/c-ares/default.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "A C library for asynchronous DNS requests";
-    homepage = http://c-ares.haxx.se;
+    homepage = https://c-ares.haxx.se;
     license = licenses.mit;
     platforms = platforms.all;
   };
diff --git a/pkgs/development/libraries/openssl/chacha.nix b/pkgs/development/libraries/openssl/chacha.nix
index 347217006528..86015abb9817 100644
--- a/pkgs/development/libraries/openssl/chacha.nix
+++ b/pkgs/development/libraries/openssl/chacha.nix
@@ -72,7 +72,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = {
-    homepage = http://www.openssl.org/;
+    homepage = https://www.openssl.org/;
     description = "A cryptographic library that implements the SSL and TLS protocols";
     platforms = [ "x86_64-linux" ];
     maintainers = [ stdenv.lib.maintainers.cstrahan ];
diff --git a/pkgs/development/libraries/openssl/default.nix b/pkgs/development/libraries/openssl/default.nix
index 394eab6c9db3..5a4d23b6a39b 100644
--- a/pkgs/development/libraries/openssl/default.nix
+++ b/pkgs/development/libraries/openssl/default.nix
@@ -96,7 +96,7 @@ let
     };
 
     meta = {
-      homepage = http://www.openssl.org/;
+      homepage = https://www.openssl.org/;
       description = "A cryptographic library that implements the SSL and TLS protocols";
       platforms = stdenv.lib.platforms.all;
       maintainers = [ stdenv.lib.maintainers.peti ];
diff --git a/pkgs/development/libraries/poppler/default.nix b/pkgs/development/libraries/poppler/default.nix
index e8edee3ba183..5fcb7d386faf 100644
--- a/pkgs/development/libraries/poppler/default.nix
+++ b/pkgs/development/libraries/poppler/default.nix
@@ -61,7 +61,7 @@ stdenv.mkDerivation rec {
       "sed '/^SUBDIRS =/s/ test / /' -i Makefile.in";
 
   meta = with lib; {
-    homepage = http://poppler.freedesktop.org/;
+    homepage = https://poppler.freedesktop.org/;
     description = "A PDF rendering library";
 
     longDescription = ''
diff --git a/pkgs/misc/themes/albatross/default.nix b/pkgs/misc/themes/albatross/default.nix
index 965ee82a8263..14fe0f21d80e 100644
--- a/pkgs/misc/themes/albatross/default.nix
+++ b/pkgs/misc/themes/albatross/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "A desktop Suite for Xfce";
-    homepage = http://shimmerproject.org/our-projects/albatross/;
+    homepage = https://github.com/shimmerproject/Albatross;
     license = stdenv.lib.licenses.gpl2;
     platforms = stdenv.lib.platforms.unix;
   };
diff --git a/pkgs/misc/themes/paper/default.nix b/pkgs/misc/themes/paper/default.nix
index 3a337520d938..8bcb48812a3e 100644
--- a/pkgs/misc/themes/paper/default.nix
+++ b/pkgs/misc/themes/paper/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "A modern desktop theme suite featuring a mostly flat with a minimal use of shadows for depth";
-    homepage = http://snwh.org/paper;
+    homepage = https://snwh.org/paper;
     license = licenses.gpl3;
     platforms = platforms.linux;
     maintainers = [ maintainers.simonvandel maintainers.romildo ];
diff --git a/pkgs/os-specific/linux/acpitool/default.nix b/pkgs/os-specific/linux/acpitool/default.nix
index 9b2a984f3ae1..ce47932587cf 100644
--- a/pkgs/os-specific/linux/acpitool/default.nix
+++ b/pkgs/os-specific/linux/acpitool/default.nix
@@ -43,7 +43,7 @@ in stdenv.mkDerivation rec {
 
   meta = {
     description = "A small, convenient command-line ACPI client with a lot of features";
-    homepage = http://freeunix.dyndns.org:8000/site2/acpitool.shtml;
+    homepage = https://sourceforge.net/projects/acpitool/;
     license = stdenv.lib.licenses.gpl2Plus;
     maintainers = [ stdenv.lib.maintainers.guibert ];
     platforms = stdenv.lib.platforms.unix;
diff --git a/pkgs/servers/irc/charybdis/default.nix b/pkgs/servers/irc/charybdis/default.nix
index b2288336d579..befb4039ea09 100644
--- a/pkgs/servers/irc/charybdis/default.nix
+++ b/pkgs/servers/irc/charybdis/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "IRCv3 server designed to be highly scalable";
-    homepage    = http://www.charybdis.io/;
+    homepage    = http://atheme.org/projects/charybdis.html;
     license     = licenses.gpl2;
     maintainers = with maintainers; [ lassulus fpletz ];
     platforms   = platforms.unix;
diff --git a/pkgs/tools/networking/dd-agent/default.nix b/pkgs/tools/networking/dd-agent/default.nix
index d1171a3c8355..805b0dddcacf 100644
--- a/pkgs/tools/networking/dd-agent/default.nix
+++ b/pkgs/tools/networking/dd-agent/default.nix
@@ -87,7 +87,7 @@ in stdenv.mkDerivation rec {
 
   meta = {
     description = "Event collector for the DataDog analysis service";
-    homepage    = http://www.datadoghq.com;
+    homepage    = https://www.datadoghq.com;
     license     = stdenv.lib.licenses.bsd3;
     platforms   = stdenv.lib.platforms.all;
     maintainers = with stdenv.lib.maintainers; [ thoughtpolice domenkozar ];
diff --git a/pkgs/tools/security/pass/default.nix b/pkgs/tools/security/pass/default.nix
index 331a75495ed3..24922db2e775 100644
--- a/pkgs/tools/security/pass/default.nix
+++ b/pkgs/tools/security/pass/default.nix
@@ -84,7 +84,7 @@ in stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Stores, retrieves, generates, and synchronizes passwords securely";
-    homepage    = http://www.passwordstore.org/;
+    homepage    = https://www.passwordstore.org/;
     license     = licenses.gpl2Plus;
     maintainers = with maintainers; [ lovek323 the-kenny fpletz ];
     platforms   = platforms.unix;