diff --git a/CMakeLists.txt b/CMakeLists.txt
index f7316ee..444b670 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.8)
+cmake_minimum_required(VERSION 3.12)
 project(libime VERSION 1.1.9)
 set(LibIME_VERSION ${PROJECT_VERSION})
 
@@ -8,6 +8,7 @@ set(CMAKE_MODULE_PATH ${ECM_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/cmake" ${C
 #########################################
 # Options
 #########################################
+option(BUILD_SHARED_LIBS "Build library as shared libs" On)
 option(ENABLE_TEST "Build Test" On)
 option(ENABLE_COVERAGE "Build the project with gcov support (Need ENABLE_TEST=On)" Off)
 set(GCOV_TOOL "gcov" CACHE STRING "Path to gcov tool used by coverage.")
diff --git a/src/libime/core/CMakeLists.txt b/src/libime/core/CMakeLists.txt
index 35ee954..d51e732 100644
--- a/src/libime/core/CMakeLists.txt
+++ b/src/libime/core/CMakeLists.txt
@@ -9,7 +9,7 @@ foreach(f ${__KENLM_SRCS})
     endif()
 endforeach()
 
-add_library(kenlm STATIC ${KENLM_SRCS})
+add_library(kenlm OBJECT ${KENLM_SRCS})
 target_include_directories(kenlm PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/kenlm>)
 target_compile_definitions(kenlm PUBLIC -DKENLM_MAX_ORDER=3 PRIVATE -DNDEBUG)
 target_link_libraries(kenlm PUBLIC Boost::boost PkgConfig::ZSTD)
@@ -69,7 +69,7 @@ ecm_setup_version(PROJECT
 # the cmake if will
 set(IMECore_SOVERSION 0)
 
-add_library(IMECore SHARED ${LIBIME_SRCS})
+add_library(IMECore ${LIBIME_SRCS})
 set_target_properties(IMECore
                       PROPERTIES VERSION ${IMECore_VERSION}
                       SOVERSION ${IMECore_SOVERSION}
diff --git a/src/libime/pinyin/CMakeLists.txt b/src/libime/pinyin/CMakeLists.txt
index a5e6d35..96fcbbb 100644
--- a/src/libime/pinyin/CMakeLists.txt
+++ b/src/libime/pinyin/CMakeLists.txt
@@ -32,7 +32,7 @@ ecm_setup_version(PROJECT
                   PACKAGE_VERSION_FILE "${CMAKE_CURRENT_BINARY_DIR}/LibIMEPinyinConfigVersion.cmake")
 set(IMEPinyin_SOVERSION 0)
 
-add_library(IMEPinyin SHARED ${LIBIME_PINYIN_SRCS})
+add_library(IMEPinyin ${LIBIME_PINYIN_SRCS})
 set_target_properties(IMEPinyin PROPERTIES
                       VERSION ${IMEPinyin_VERSION}
                       SOVERSION ${IMEPinyin_SOVERSION}
diff --git a/src/libime/table/CMakeLists.txt b/src/libime/table/CMakeLists.txt
index 62317bd..620a6ee 100644
--- a/src/libime/table/CMakeLists.txt
+++ b/src/libime/table/CMakeLists.txt
@@ -23,7 +23,7 @@ ecm_setup_version(PROJECT
                   PACKAGE_VERSION_FILE "${CMAKE_CURRENT_BINARY_DIR}/LibIMETableConfigVersion.cmake")
 set(IMETable_SOVERSION 0)
 
-add_library(IMETable SHARED ${LIBIME_TABLE_SRCS})
+add_library(IMETable ${LIBIME_TABLE_SRCS})
 set_target_properties(IMETable
                       PROPERTIES VERSION ${IMETable_VERSION}
                       SOVERSION ${IMETable_SOVERSION}
diff --git a/tools/CMakeLists.txt b/tools/CMakeLists.txt
index e5ecf4b..b8b9445 100644
--- a/tools/CMakeLists.txt
+++ b/tools/CMakeLists.txt
@@ -24,7 +24,7 @@ target_link_libraries(libime_tabledict LibIME::Table)
 install(TARGETS libime_tabledict DESTINATION ${CMAKE_INSTALL_BINDIR} COMPONENT tools)
 add_executable(LibIME::tabledict ALIAS libime_tabledict)
 
-add_library(filesystem_helper filesystem_helper.cpp)
+add_library(filesystem_helper STATIC filesystem_helper.cpp)
 if (HAS_STD_FILESYSTEM)
     target_compile_definitions(filesystem_helper PRIVATE -DHAS_STD_FILESYSTEM)
 else()