updated README
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 [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0) [![UPRJ_CI](https://github.com/efabless/caravel_project_example/actions/workflows/user_project_ci.yml/badge.svg)](https://github.com/efabless/caravel_project_example/actions/workflows/user_project_ci.yml) [![Caravel Build](https://github.com/efabless/caravel_project_example/actions/workflows/caravel_build.yml/badge.svg)](https://github.com/efabless/caravel_project_example/actions/workflows/caravel_build.yml)
 
 # Azadi RISC-V SoC
-Azadi is an SoC with 32-bit RISC-V uni-core "buraq", buraq is in-order core with a 3-stage pipeline that implements the RV32IMFD instruction set architecture.
+Azadi is an SoC with 32-bit RISC-V signal core extented version of [ibex](https://github.com/lowRISC/ibex) we named it as "buraq", it is a 3-stage pipeline core which implements the RV32IMF instruction set architecture, limited number of peripherals UART, SPI, GPIO, PWM and timer.
+The parent repository of azadi-soc can be found [here](https://github.com/merledu/azadi).