diff --git a/English/CommunitySources.md b/English/CommunitySources.md
index fa71fb2..beaefd8 100644
--- a/English/CommunitySources.md
+++ b/English/CommunitySources.md
@@ -5,6 +5,7 @@
 - [CppReference](https://en.cppreference.com)
 - [CPlusPlus](https://www.cplusplus.com/reference)
 - [C++ Core Guidelines](https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines)
+- [Microsoft GSL C++ (Guidelines Support Library)](https://github.com/microsoft/GSL)
 - [News from the C++ Standardization Committee](https://isocpp.org/)
 - [C++ Online Compiler Explorer](https://gcc.godbolt.org)
 
diff --git a/Russian/CommunitySources.md b/Russian/CommunitySources.md
index f2466c6..0464e0b 100644
--- a/Russian/CommunitySources.md
+++ b/Russian/CommunitySources.md
@@ -5,6 +5,7 @@
 - [CppReference](https://en.cppreference.com)
 - [CPlusPlus](https://www.cplusplus.com/reference)
 - [C++ Core Guidelines](https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines)
+- [Microsoft GSL C++ (Guidelines Support Library)](https://github.com/microsoft/GSL)
 - [Рабочая группа C++ - представители комитета по стандартизации языка в России](https://stdcpp.ru/)
 - [Новости от комитета стандартизации С++ (ENG)](https://isocpp.org/)
 - [C++ Online Compiler Explorer](https://gcc.godbolt.org)