diff --git a/INSTALL b/INSTALL
index 2c457f4b..7ed4ff20 100644
--- a/INSTALL
+++ b/INSTALL
@@ -8,10 +8,12 @@ In order to build libssh, you need to install several components:
 
 - A C compiler
 - [CMake](https://www.cmake.org) >= 3.5.0
-- [openssl](https://www.openssl.org) >= 1.0.1
-or
-- [gcrypt](https://www.gnu.org/directory/Security/libgcrypt.html) >= 1.4
 - [libz](https://www.zlib.net) >= 1.2
+- [openssl](https://www.openssl.org) >= 1.1.1
+or
+- [gcrypt](https://www.gnu.org/directory/Security/libgcrypt.html) >= 1.5
+or
+- [Mbed TLS](https://www.trustedfirmware.org/projects/mbed-tls/)
 
 optional:
 - [cmocka](https://cmocka.org/) >= 1.1.0