diff --git a/u01/CMakeLists.txt b/u01/CMakeLists.txt
index 8851be7..012bd24 100644
--- a/u01/CMakeLists.txt
+++ b/u01/CMakeLists.txt
@@ -1,9 +1,7 @@
 cmake_minimum_required(VERSION 3.20)
 project(ecg_tree)
 
-add_library(tree SHARED node.cpp)
-#                ~~~~~~
-# This can be changed to STATIC to build and link a static library.
+add_library(tree node.cpp)
 add_executable(main main.cpp)
 target_link_libraries(main tree)