diff --git a/JSON Web Token/README.md b/JSON Web Token/README.md
index 242a9a9..fabb150 100644
--- a/JSON Web Token/README.md	
+++ b/JSON Web Token/README.md	
@@ -301,15 +301,14 @@ eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMj...Fh7HgQ:secret
 - [Hacking JSON Web Token (JWT) - Hate_401](https://medium.com/101-writeups/hacking-json-web-token-jwt-233fe6c862e6)
 - [WebSec CTF - Authorization Token - JWT Challenge](https://ctf.rip/websec-ctf-authorization-token-jwt-challenge/)
 - [Privilege Escalation like a Boss - October 27, 2018 - janijay007](https://blog.securitybreached.org/2018/10/27/privilege-escalation-like-a-boss/)
-- [5 Easy Steps to Understanding JSON Web Token](https://medium.com/vandium-software/5-easy-steps-to-understanding-json-web-tokens-jwt-1164c0adfcec)
-- [Hacking JSON Web Tokens - From Zero To Hero Without Effort - Websecurify Blog](https://blog.websecurify.com/2017/02/hacking-json-web-tokens.html)
+- [5 Easy Steps to Understanding JSON Web Token](https://medium.com/cyberverse/five-easy-steps-to-understand-json-web-tokens-jwt-7665d2ddf4d5)
+- [Hacking JSON Web Tokens - From Zero To Hero Without Effort - Websecurify Blog](https://web.archive.org/web/20220305042224/https://blog.websecurify.com/2017/02/hacking-json-web-tokens.html)
 - [HITBGSEC CTF 2017 - Pasty (Web) - amon (j.heng)](https://nandynarwhals.org/hitbgsec2017-pasty/)
 - [Critical vulnerabilities in JSON Web Token libraries - March 31, 2015 - Tim McLean](https://auth0.com/blog/critical-vulnerabilities-in-json-web-token-libraries//)
 - [Learn how to use JSON Web Tokens (JWT) for Authentication - @dwylhq](https://github.com/dwyl/learn-json-web-tokens)
 - [Simple JWT hacking - @b1ack_h00d](https://medium.com/@blackhood/simple-jwt-hacking-73870a976750)
 - [Attacking JWT authentication - Sep 28, 2016 - Sjoerd Langkemper](https://www.sjoerdlangkemper.nl/2016/09/28/attacking-jwt-authentication/)
 - [How to Hack a Weak JWT Implementation with a Timing Attack - Jan 7, 2017 - Tamas Polgar](https://hackernoon.com/can-timing-attack-be-a-practical-security-threat-on-jwt-signature-ba3c8340dea9)
-- [HACKING JSON WEB TOKENS, FROM ZERO TO HERO WITHOUT EFFORT - Thu Feb 09 2017 - @pdp](https://blog.websecurify.com/2017/02/hacking-json-web-tokens.html)
-- [Write up – JRR Token – LeHack 2019 - 07/07/2019 - LAPHAZE](http://rootinthemiddle.org/write-up-jrr-token-lehack-2019/)
+- [Write up – JRR Token – LeHack 2019 - 07/07/2019 - LAPHAZE](https://web.archive.org/web/20210512205928/https://rootinthemiddle.org/write-up-jrr-token-lehack-2019/)
 - [JWT Hacking 101 - TrustFoundry - Tyler Rosonke - December 8th, 2017](https://trustfoundry.net/jwt-hacking-101/)
 - [JSON Web Token Validation Bypass in Auth0 Authentication API - Ben Knight Senior Security Consultant - April 16, 2020](https://insomniasec.com/blog/auth0-jwt-validation-bypass)
diff --git a/Methodology and Resources/Windows - Privilege Escalation.md b/Methodology and Resources/Windows - Privilege Escalation.md
index 5efb4b4..1b57528 100644
--- a/Methodology and Resources/Windows - Privilege Escalation.md	
+++ b/Methodology and Resources/Windows - Privilege Escalation.md	
@@ -1478,7 +1478,7 @@ Detailed information about the vulnerability : https://www.zerodayinitiative.com
 
 * [Windows Internals Book - 02/07/2017](https://docs.microsoft.com/en-us/sysinternals/learn/windows-internals)
 * [icacls - Docs Microsoft](https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/icacls)
-* [Privilege Escalation Windows - Philip Linghammar](https://xapax.gitbooks.io/security/content/privilege_escalation_windows.html)
+* [Privilege Escalation Windows - Philip Linghammar](https://web.archive.org/web/20191231011305/https://xapax.gitbooks.io/security/content/privilege_escalation_windows.html)
 * [Windows elevation of privileges - Guifre Ruiz](https://guif.re/windowseop)
 * [The Open Source Windows Privilege Escalation Cheat Sheet by amAK.xyz and @xxByte](https://addaxsoft.com/wpecs/)
 * [Basic Linux Privilege Escalation](https://blog.g0tmi1k.com/2011/08/basic-linux-privilege-escalation/)
@@ -1503,7 +1503,7 @@ Detailed information about the vulnerability : https://www.zerodayinitiative.com
 * [Pentestlab.blog - WPE-13 - Intel SYSRET](https://pentestlab.blog/2017/06/14/intel-sysret/)
 * [Alternative methods of becoming SYSTEM - 20th November 2017 - Adam Chester @_xpn_](https://blog.xpnsec.com/becoming-system/)
 * [Living Off The Land Binaries and Scripts (and now also Libraries)](https://github.com/LOLBAS-Project/LOLBAS)
-* [Common Windows Misconfiguration: Services - 2018-09-23 - @am0nsec](https://amonsec.net/2018/09/23/Common-Windows-Misconfiguration-Services.html)
+* [Common Windows Misconfiguration: Services - 2018-09-23 - @am0nsec](https://web.archive.org/web/20191105182846/https://amonsec.net/2018/09/23/Common-Windows-Misconfiguration-Services.html)
 * [Local Privilege Escalation Workshop - Slides.pdf - @sagishahar](https://github.com/sagishahar/lpeworkshop/blob/master/Local%20Privilege%20Escalation%20Workshop%20-%20Slides.pdf)
 * [Abusing Diaghub - xct - March 07, 2019](https://vulndev.io/2019/03/06/abusing-diaghub/)
 * [Windows Exploitation Tricks: Exploiting Arbitrary File Writes for Local Elevation of Privilege - James Forshaw, Project Zero - Wednesday, April 18, 2018](https://googleprojectzero.blogspot.com/2018/04/windows-exploitation-tricks-exploiting.html)