diff --git a/README.md b/README.md
index 5c3e8ba..5b2ad2e 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,8 @@
 # Bytom
 
+[![codecov](https://codecov.io/github/Argmaster/bytom/graph/badge.svg?token=75JqvdVUCo)](https://codecov.io/github/Argmaster/bytom)
+
 Bytom is collective name of a 32-bit virtual hardware platform with a custom 32-bit ISA
 and tools for generating bytecode for the platform. The platform is designed to be a
 simplified model of a real-world hardware. Currently the platform is in early stage of
-development with no way of compiling assembly or running the bytecode, come back in a
-few weeks or months :D
+development. Assembler executable can be built with Bytom.Assembler.Executable target.