diff --git a/CMakeLists.txt b/CMakeLists.txt
index edd6748..641b74a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -243,6 +243,14 @@ add_library(littlefs STATIC
 target_include_directories(littlefs PUBLIC "${InfiniTime_DIR}/src/libs/littlefs")
 target_link_libraries(infinisim PRIVATE littlefs)
 
+# sunset
+add_library(sunset STATIC
+  ${InfiniTime_DIR}/src/libs/sunset/src/sunset.h
+  ${InfiniTime_DIR}/src/libs/sunset/src/sunset.cpp
+)
+target_include_directories(sunset PUBLIC "${InfiniTime_DIR}/src/libs/sunset")
+target_link_libraries(infinisim PRIVATE sunset)
+
 # QCBOR
 add_library(QCBOR STATIC
   ${InfiniTime_DIR}/src/libs/QCBOR/src/ieee754.c