diff --git a/CMakeLists.txt b/CMakeLists.txt
index be613ed..09a66d9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -66,6 +66,22 @@ add_custom_command(OUTPUT ${YACC_GENERATED_SOURCE_FILE}
         COMMENT "generate C source file for parser"
         VERBATIM)
 
+# ------------------------------------------------ #
+#  TOML-C99                                        #
+# ------------------------------------------------ #
+
+add_custom_command(OUTPUT ${PROJECT_SOURCE_DIR}/dep/tomlc99/toml.c
+        COMMAND git
+        ARGS submodule update --init --recursive --checkout
+        COMMENT "checkout dependency TOML-C99"
+        VERBATIM)
+
+add_library(tomlc99 ${PROJECT_SOURCE_DIR}/dep/tomlc99/toml.c)
+set_target_properties(tomlc99
+        PROPERTIES
+        OUTPUT_NAME "toml"
+        ARCHIVE_OUTPUT_DIRECTORY ${GEMSTONE_BINARY_DIR}/dep)
+
 # ------------------------------------------------ #
 #  Source                                          #
 # ------------------------------------------------ #
@@ -93,6 +109,8 @@ set_target_properties(release
         OUTPUT_NAME "gsc"
         RUNTIME_OUTPUT_DIRECTORY ${GEMSTONE_BINARY_DIR}/release)
 
+target_link_libraries(release tomlc99)
+
 # FIXME: cannot compile with /O2 because of /RTC1 flag
 if (MSVC)
     set(RELEASE_FLAGS)
@@ -125,6 +143,8 @@ set_target_properties(debug
         OUTPUT_NAME "gsc"
         RUNTIME_OUTPUT_DIRECTORY ${GEMSTONE_BINARY_DIR}/debug)
 
+target_link_libraries(debug tomlc99)
+
 if (MSVC)
     set(DEBUG_FLAGS /DEBUG)
 else()
@@ -154,6 +174,8 @@ set_target_properties(check
         OUTPUT_NAME "gsc"
         RUNTIME_OUTPUT_DIRECTORY ${GEMSTONE_BINARY_DIR}/check)
 
+target_link_libraries(check tomlc99)
+
 if (MSVC)
     set(CHECK_FLAGS /DEBUG /WX)
 else()