diff --git a/CMakeLists.txt b/CMakeLists.txt
index ac87215..73bfff6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -95,6 +95,6 @@ add_subdirectory(external/glm)
 target_link_libraries(PortalGame PRIVATE glm)
 target_include_directories(PortalGame PRIVATE "external/stb")
 
-add_subdirectory(bullet3)
+add_subdirectory(external/bullet3)
 target_link_libraries(PortalGame PRIVATE BulletCollision LinearMath Bullet3Common)
-target_include_directories(PortalGame PRIVATE "bullet3/src")
+target_include_directories(PortalGame PRIVATE "external/bullet3/src")