diff --git a/src/Makefile b/src/Makefile
index aa8943f..2540d34 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -280,7 +280,7 @@ pypkg: python/dist/$(PYTHON_PKG_NAME)-$(VERSION).tar.gz
 
 
 required_python_packages:
-	@$(PIP) install numpy click-man
+	@$(PIP) install numpy matplotlib click-man
 
 
 python/VERSION: