diff --git a/README.md b/README.md
index 389eacb..93ba874 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ Files under the [tools](tools/) directory may be available under a different lic
 ## Dependencies
 
 - Verilator **(3.926 or later)** must be installed on the system
-- If adding/removing instructions, espresso must be installed (used by *tools/coredecode*)
+- If adding/removing instructions, espresso must be installed. Espresso is a logic minimization tool used in *tools/coredecode*.
 
 ## Quickstart guide
 1. Clone the repository