diff --git a/README b/README
index ea40668..d6ed420 100644
--- a/README
+++ b/README
@@ -174,9 +174,12 @@ trasmit channels values each 10 minutes and full channel descriptions each 70 mi
 9. TOOLCHAIN
 To build the ParaTNC software 'GNU ARM Embedded Toolchain' is required. This set contains gcc-arm-none-eabi compiler,
 gdb debugger, linker, HEX generator and set of libraries. ParaTNC is developed in Xubuntu 16.04LTS and 20.04LTS 
-using toolchain in version 2018q-2. Please take note that You have to use 64-bit version of the operation system
+using toolchain in version 2018-q2. Please take note that You have to use 64-bit version of the operation system
 as the 32-bit variant of the toolchain is not avaliable. 
 
+Exact GCC version is 7.3.1 and it present itself with a string like this below
+gcc version 7.3.1 20180622 (release) [ARM/embedded-7-branch revision 261907] (GNU Tools for Arm Embedded Processors 7-2018-q2-update) 
+
 Self conatined TAR.BZ2 archive with all required tools can be found here:
 https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-rm/downloads
 in 'What's new in 7-2018-q2-update' section pulled down from the list located in the middle of this site.