diff --git a/cd/00_setup_env.sh b/cd/00_setup_env.sh
index 48c2fd2bab..668a70a0b5 100755
--- a/cd/00_setup_env.sh
+++ b/cd/00_setup_env.sh
@@ -2,7 +2,7 @@
 #
 # Copyright (c) 2019-2020 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
-# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+# file COPYING or https://opensource.org/licenses/mit-license.php.
 
 export LC_ALL=C.UTF-8
 
diff --git a/cd/00_setup_env_mac.sh b/cd/00_setup_env_mac.sh
index 601693024e..64beb8b0bb 100755
--- a/cd/00_setup_env_mac.sh
+++ b/cd/00_setup_env_mac.sh
@@ -2,7 +2,7 @@
 #
 # Copyright (c) 2019-2020 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
-# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+# file COPYING or https://opensource.org/licenses/mit-license.php.
 
 export LC_ALL=C.UTF-8
 
diff --git a/cd/00_setup_env_win32.sh b/cd/00_setup_env_win32.sh
index 0ecb90de85..e95b099721 100755
--- a/cd/00_setup_env_win32.sh
+++ b/cd/00_setup_env_win32.sh
@@ -2,7 +2,7 @@
 #
 # Copyright (c) 2019-2020 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
-# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+# file COPYING or https://opensource.org/licenses/mit-license.php.
 
 export LC_ALL=C.UTF-8
 
diff --git a/cd/00_setup_env_win64.sh b/cd/00_setup_env_win64.sh
index 69b1416143..aad3645d37 100755
--- a/cd/00_setup_env_win64.sh
+++ b/cd/00_setup_env_win64.sh
@@ -2,7 +2,7 @@
 #
 # Copyright (c) 2019-2020 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
-# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+# file COPYING or https://opensource.org/licenses/mit-license.php.
 
 export LC_ALL=C.UTF-8
 
diff --git a/cd/03_before_install.sh b/cd/03_before_install.sh
index 7cedd53c8f..b0dcbbd5e1 100755
--- a/cd/03_before_install.sh
+++ b/cd/03_before_install.sh
@@ -2,7 +2,7 @@
 #
 # Copyright (c) 2018-2019 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
-# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+# file COPYING or https://opensource.org/licenses/mit-license.php.
 
 export LC_ALL=C.UTF-8
 
diff --git a/cd/04_install.sh b/cd/04_install.sh
index 96dc9abdec..154d6a56ac 100755
--- a/cd/04_install.sh
+++ b/cd/04_install.sh
@@ -2,7 +2,7 @@
 #
 # Copyright (c) 2018-2020 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
-# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+# file COPYING or https://opensource.org/licenses/mit-license.php.
 
 export LC_ALL=C.UTF-8
 
diff --git a/cd/06_script_a.sh b/cd/06_script_a.sh
index 805b45d32b..88abf37c14 100755
--- a/cd/06_script_a.sh
+++ b/cd/06_script_a.sh
@@ -2,7 +2,7 @@
 #
 # Copyright (c) 2018-2020 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
-# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+# file COPYING or https://opensource.org/licenses/mit-license.php.
 
 export LC_ALL=C.UTF-8
 
diff --git a/cd/06_script_b.sh b/cd/06_script_b.sh
index 963ff42c9c..75e39be007 100755
--- a/cd/06_script_b.sh
+++ b/cd/06_script_b.sh
@@ -2,7 +2,7 @@
 #
 # Copyright (c) 2021 The Gridcoin developers
 # Distributed under the MIT software license, see the accompanying
-# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+# file COPYING or https://opensource.org/licenses/mit-license.php.
 
 export LC_ALL=C.UTF-8
 
diff --git a/cd/run_all.sh b/cd/run_all.sh
index 7fcc53089b..c806ea5f47 100755
--- a/cd/run_all.sh
+++ b/cd/run_all.sh
@@ -2,7 +2,7 @@
 #
 # Copyright (c) 2019 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
-# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+# file COPYING or https://opensource.org/licenses/mit-license.php.
 
 export LC_ALL=C.UTF-8
 
diff --git a/share/genbuild.sh b/share/genbuild.sh
index fe89ae1fde..4827c6c8e1 100755
--- a/share/genbuild.sh
+++ b/share/genbuild.sh
@@ -1,7 +1,7 @@
 #!/bin/sh
 # Copyright (c) 2012-2020 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
-# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+# file COPYING or https://opensource.org/licenses/mit-license.php.
 
 export LC_ALL=C
 if [ $# -gt 1 ]; then
diff --git a/src/Makefile.crc32c.include b/src/Makefile.crc32c.include
index 113272e65e..a34a2c4a19 100644
--- a/src/Makefile.crc32c.include
+++ b/src/Makefile.crc32c.include
@@ -1,6 +1,6 @@
 # Copyright (c) 2019 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
-# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+# file COPYING or https://opensource.org/licenses/mit-license.php.
 
 LIBCRC32C_INT = crc32c/libcrc32c.a
 LIBLEVELDB_SSE42_INT  = leveldb/libleveldb_sse42.a
diff --git a/src/base58.h b/src/base58.h
index 6012751153..214f021a0c 100644
--- a/src/base58.h
+++ b/src/base58.h
@@ -1,7 +1,7 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
 // Copyright (c) 2009-2020 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 /**
  * Why base-58 instead of standard base-64 encoding?
diff --git a/src/clientversion.cpp b/src/clientversion.cpp
index ef15a05bfb..879437e66c 100644
--- a/src/clientversion.cpp
+++ b/src/clientversion.cpp
@@ -1,7 +1,7 @@
 // Copyright (c) 2012-2020 The Bitcoin Core developers
 // Copyright (c) 2021 The Gridcoin developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 #include <clientversion.h>
 
diff --git a/src/compat/cpuid.h b/src/compat/cpuid.h
index 0877ad47d3..84b1e01447 100644
--- a/src/compat/cpuid.h
+++ b/src/compat/cpuid.h
@@ -1,6 +1,6 @@
 // Copyright (c) 2017-2019 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 #ifndef BITCOIN_COMPAT_CPUID_H
 #define BITCOIN_COMPAT_CPUID_H
diff --git a/src/crypto/sha3.cpp b/src/crypto/sha3.cpp
index 9c0c42fa77..a928eeb2aa 100644
--- a/src/crypto/sha3.cpp
+++ b/src/crypto/sha3.cpp
@@ -1,6 +1,6 @@
 // Copyright (c) 2020 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 // Based on https://github.com/mjosaarinen/tiny_sha3/blob/master/sha3.c
 // by Markku-Juhani O. Saarinen <mjos@iki.fi>
diff --git a/src/crypto/sha3.h b/src/crypto/sha3.h
index f9287c1622..e7396e9062 100644
--- a/src/crypto/sha3.h
+++ b/src/crypto/sha3.h
@@ -1,6 +1,6 @@
 // Copyright (c) 2020 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 #ifndef BITCOIN_CRYPTO_SHA3_H
 #define BITCOIN_CRYPTO_SHA3_H
diff --git a/src/node/blockstorage.cpp b/src/node/blockstorage.cpp
index 86cc2e7e57..f491b723a8 100644
--- a/src/node/blockstorage.cpp
+++ b/src/node/blockstorage.cpp
@@ -1,7 +1,7 @@
 // Copyright (c) 2011-2021 The Bitcoin Core developers
 // Copyright (c) 2021 The Gridcoin developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 #include "chainparams.h"
 #include "clientversion.h"
diff --git a/src/node/blockstorage.h b/src/node/blockstorage.h
index 8bddc16ccc..12f8682b44 100644
--- a/src/node/blockstorage.h
+++ b/src/node/blockstorage.h
@@ -1,7 +1,7 @@
 // Copyright (c) 2011-2021 The Bitcoin Core developers
 // Copyright (c) 2021 The Gridcoin developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 #ifndef BITCOIN_NODE_BLOCKSTORAGE_H
 #define BITCOIN_NODE_BLOCKSTORAGE_H
diff --git a/src/qt/locale/bitcoin_pl.ts b/src/qt/locale/bitcoin_pl.ts
index 73ecd30b60..67bf509f1b 100644
--- a/src/qt/locale/bitcoin_pl.ts
+++ b/src/qt/locale/bitcoin_pl.ts
@@ -19,7 +19,7 @@ This product includes software developed by the OpenSSL Project for use in the O
         <translation>
 Oprogramowanie eksperymentalne.
 
-Rozprowadzane na licencji MIT/X11, zobacz plik 'COPYING' lub http://www.opensource.org/licenses/mit-license.php.
+Rozprowadzane na licencji MIT/X11, zobacz plik 'COPYING' lub https://opensource.org/licenses/mit-license.php.
 
 Ten produkt zawiera oprogramowanie stworzone przez OpenSSL Project do użytku przez OpenSSL Toolkit (http://www.openssl.org/). Oprogramowanie kryptograficzne napisane przez Eric'a Young (eay@cryptsoft.com) i oprogramowanie UPnP napisane przez Thomas'a Bernard.</translation>
     </message>
diff --git a/src/random.cpp b/src/random.cpp
index 174f4cef31..1aca5af94a 100644
--- a/src/random.cpp
+++ b/src/random.cpp
@@ -1,7 +1,7 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
 // Copyright (c) 2009-2020 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 #include <random.h>
 
diff --git a/src/random.h b/src/random.h
index 0c6dc24983..95362b421b 100644
--- a/src/random.h
+++ b/src/random.h
@@ -1,7 +1,7 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
 // Copyright (c) 2009-2020 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 #ifndef BITCOIN_RANDOM_H
 #define BITCOIN_RANDOM_H
diff --git a/src/randomenv.cpp b/src/randomenv.cpp
index 43e0456af4..f3682a9760 100644
--- a/src/randomenv.cpp
+++ b/src/randomenv.cpp
@@ -1,7 +1,7 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
 // Copyright (c) 2009-2020 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 #if defined(HAVE_CONFIG_H)
 #include <config/gridcoin-config.h>
diff --git a/src/randomenv.h b/src/randomenv.h
index 46cea6f6f2..9996e3c1bc 100644
--- a/src/randomenv.h
+++ b/src/randomenv.h
@@ -1,7 +1,7 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
 // Copyright (c) 2009-2019 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 #ifndef BITCOIN_RANDOMENV_H
 #define BITCOIN_RANDOMENV_H
diff --git a/src/scheduler.cpp b/src/scheduler.cpp
index b9b0cbe8f0..308c732f65 100644
--- a/src/scheduler.cpp
+++ b/src/scheduler.cpp
@@ -1,6 +1,6 @@
 // Copyright (c) 2015-2020 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 #include <scheduler.h>
 
diff --git a/src/scheduler.h b/src/scheduler.h
index 9eec8c0fa0..71b620d9f3 100644
--- a/src/scheduler.h
+++ b/src/scheduler.h
@@ -1,6 +1,6 @@
 // Copyright (c) 2015-2020 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 #ifndef BITCOIN_SCHEDULER_H
 #define BITCOIN_SCHEDULER_H
diff --git a/src/test/base32_tests.cpp b/src/test/base32_tests.cpp
index 300aa67327..c294a6b4c1 100644
--- a/src/test/base32_tests.cpp
+++ b/src/test/base32_tests.cpp
@@ -1,6 +1,6 @@
 // Copyright (c) 2012-2020 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 #include <util/strencodings.h>
 
diff --git a/src/test/base58_tests.cpp b/src/test/base58_tests.cpp
index 8d046ea1e3..895c30e81c 100755
--- a/src/test/base58_tests.cpp
+++ b/src/test/base58_tests.cpp
@@ -1,6 +1,6 @@
 // Copyright (c) 2011-2020 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 #include <boost/test/unit_test.hpp>
 
diff --git a/src/test/base64_tests.cpp b/src/test/base64_tests.cpp
index 04f5b07c44..6c3f4049cc 100644
--- a/src/test/base64_tests.cpp
+++ b/src/test/base64_tests.cpp
@@ -1,6 +1,6 @@
 // Copyright (c) 2011-2020 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 #include <util/strencodings.h>
 
diff --git a/src/test/compilerbug_tests.cpp b/src/test/compilerbug_tests.cpp
index a9cec624ae..c9234dec46 100644
--- a/src/test/compilerbug_tests.cpp
+++ b/src/test/compilerbug_tests.cpp
@@ -1,6 +1,6 @@
 // Copyright (c) 2019-2020 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 #include <boost/test/unit_test.hpp>
 
diff --git a/src/test/sanity_tests.cpp b/src/test/sanity_tests.cpp
index 307fa9306f..20a76612bd 100644
--- a/src/test/sanity_tests.cpp
+++ b/src/test/sanity_tests.cpp
@@ -1,6 +1,6 @@
 // Copyright (c) 2012-2017 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 #include <key.h>
 #include <util/time.h>
diff --git a/src/test/scheduler_tests.cpp b/src/test/scheduler_tests.cpp
index ad44fe734f..7d53443458 100644
--- a/src/test/scheduler_tests.cpp
+++ b/src/test/scheduler_tests.cpp
@@ -1,6 +1,6 @@
 // Copyright (c) 2012-2020 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 #include <random.h>
 #include <scheduler.h>
diff --git a/src/test/script_p2sh_tests.cpp b/src/test/script_p2sh_tests.cpp
index 132543f89e..d7871cc8eb 100755
--- a/src/test/script_p2sh_tests.cpp
+++ b/src/test/script_p2sh_tests.cpp
@@ -1,6 +1,6 @@
 // Copyright (c) 2012-2020 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 #include <main.h>
 #include <policy/policy.h>
diff --git a/src/test/script_tests.cpp b/src/test/script_tests.cpp
index e59c30f3c0..61f2fe7618 100644
--- a/src/test/script_tests.cpp
+++ b/src/test/script_tests.cpp
@@ -1,6 +1,6 @@
 // Copyright (c) 2011-2020 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 #include <vector>
 #include <sstream>
diff --git a/src/test/sigopcount_tests.cpp b/src/test/sigopcount_tests.cpp
index 944f87f809..a0917bebbf 100644
--- a/src/test/sigopcount_tests.cpp
+++ b/src/test/sigopcount_tests.cpp
@@ -1,6 +1,6 @@
 // Copyright (c) 2012-2017 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 #include <vector>
 #include <boost/test/unit_test.hpp>
diff --git a/src/test/sync_tests.cpp b/src/test/sync_tests.cpp
index c8d476dc25..9549a835de 100644
--- a/src/test/sync_tests.cpp
+++ b/src/test/sync_tests.cpp
@@ -1,6 +1,6 @@
 // Copyright (c) 2012-2020 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 #include <sync.h>
 
diff --git a/src/test/test_gridcoin.h b/src/test/test_gridcoin.h
index 0cec1e5c90..25235c39ed 100644
--- a/src/test/test_gridcoin.h
+++ b/src/test/test_gridcoin.h
@@ -1,6 +1,6 @@
 // Copyright (c) 2015-2018 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 #ifndef GRIDCOIN_TEST_TEST_GRIDCOIN_H
 #define GRIDCOIN_TEST_TEST_GRIDCOIN_H
diff --git a/src/test/transaction_tests.cpp b/src/test/transaction_tests.cpp
index 81c8c6bcce..0c6b7b3ab8 100755
--- a/src/test/transaction_tests.cpp
+++ b/src/test/transaction_tests.cpp
@@ -1,6 +1,6 @@
 // Copyright (c) 2011-2020 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 #include <map>
 #include <string>
diff --git a/src/threadinterrupt.cpp b/src/threadinterrupt.cpp
index 340106ed99..96f597209c 100644
--- a/src/threadinterrupt.cpp
+++ b/src/threadinterrupt.cpp
@@ -1,7 +1,7 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
 // Copyright (c) 2009-2018 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 #include <threadinterrupt.h>
 
diff --git a/src/threadinterrupt.h b/src/threadinterrupt.h
index 2665f8a5be..49c58d2330 100644
--- a/src/threadinterrupt.h
+++ b/src/threadinterrupt.h
@@ -1,6 +1,6 @@
 // Copyright (c) 2016-2019 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or https://opensource.org/licenses/mit-license.php.
 
 #ifndef BITCOIN_THREADINTERRUPT_H
 #define BITCOIN_THREADINTERRUPT_H
diff --git a/test/lint/lint-python-dead-code.sh b/test/lint/lint-python-dead-code.sh
index c3b6ff3c98..90b62196c7 100755
--- a/test/lint/lint-python-dead-code.sh
+++ b/test/lint/lint-python-dead-code.sh
@@ -2,7 +2,7 @@
 #
 # Copyright (c) 2021 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
-# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+# file COPYING or https://opensource.org/licenses/mit-license.php.
 #
 # Find dead Python code.