a note on dependencies
diff --git a/README.md b/README.md
index 29a9e9a..0623eff 100644
--- a/README.md
+++ b/README.md
@@ -12,3 +12,5 @@ make all && sudo make install
```
To set the installation directory, use e.g. `sudo make install PREFIX=/usr`.
+
+BZip3 depends on POSIX APIs and the `libc`. All other dependencies (e.g. `libsais`) have been bundled into the source code trunk.
