diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..3cf1ef6
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "deps/SFML"]
+	path = deps/SFML
+	url = https://github.com/SFML/SFML.git
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 78b1ffe..40bcf90 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,11 +3,7 @@ project(SFTK LANGUAGES CXX)
 
 set(CXX_STANDARD_REQUIRED 23)
 
-include(FetchContent)
-FetchContent_Declare(SFML
-    GIT_REPOSITORY https://github.com/SFML/SFML.git
-    GIT_TAG 2.6.x)
-FetchContent_MakeAvailable(SFML)
+add_subdirectory(./deps/SFML)
 
 set(ROOT src/)
 set(CONTAINER src/containers)
diff --git a/demo/SarasaUiSC-Regular.ttf b/demo/SarasaUiSC-Regular.ttf
new file mode 100644
index 0000000..f0f9ca7
Binary files /dev/null and b/demo/SarasaUiSC-Regular.ttf differ
diff --git a/demo/demo1.cpp b/demo/demo1.cpp
index 60fdecc..21f14cb 100644
--- a/demo/demo1.cpp
+++ b/demo/demo1.cpp
@@ -5,8 +5,9 @@
 int main()
 {
     auto &window = sftk::Window::create(800, 600, L"demo1");
-    auto &label = sftk::Label::create(L"hello SFTK.", sftk::Font("SarasaUiSC-Regular.ttf", "", 18));
-    label.setColor(sf::Color::White);
+    window.setBackgroudColor(sf::Color::White);
+    auto &label = sftk::Label::create(L"hello SFTK.", sftk::Font("../demo/SarasaUiSC-Regular.ttf", "", 18));
+    label.setColor(sf::Color::Black);
     label.setPosition(vec(100.f, 100.f));
     window.exec();
 }
diff --git a/deps/SFML b/deps/SFML
new file mode 160000
index 0000000..69ea0cd
--- /dev/null
+++ b/deps/SFML
@@ -0,0 +1 @@
+Subproject commit 69ea0cd863aed1d4092b970b676924a716ff718b