diff --git a/README.md b/README.md
index 8542184..0355675 100644
--- a/README.md
+++ b/README.md
@@ -11,8 +11,8 @@
 An interface to JPL [HORIZONS](https://ssd.jpl.nasa.gov/horizons) system and other Solar System Dynamics [APIs](https://ssd.jpl.nasa.gov/api.html) in
 [Julia](http://julialang.org).
 
-> [!WARNING: breaking change]
-> Starting from v0.4.0 HORIZONS.jl connects to JPL via a HTTP API.
+> [!WARNING]
+> Breaking change: Starting from v0.4.0 HORIZONS.jl connects to JPL via a HTTP API.
 > Previous versions used the telnet command line utility as an external dependency.
 > This warning will be removed on the release of the next minor version (v0.5.0).