diff --git a/src/libime/core/datrie.h b/src/libime/core/datrie.h
index 2356a2d..5c29205 100644
--- a/src/libime/core/datrie.h
+++ b/src/libime/core/datrie.h
@@ -24,9 +24,6 @@ namespace libime {
 template <typename V, bool ORDERED = true, int MAX_TRIAL = 1>
 class DATriePrivate;
 
-template <typename T>
-class DATrie;
-
 template <typename T>
 struct NaN {
     static constexpr auto N1 = -1;
diff --git a/src/libime/core/decoder.cpp b/src/libime/core/decoder.cpp
index 3551158..1f07165 100644
--- a/src/libime/core/decoder.cpp
+++ b/src/libime/core/decoder.cpp
@@ -5,14 +5,12 @@
  */
 
 #include "decoder.h"
-#include "datrie.h"
 #include "languagemodel.h"
 #include "lattice_p.h"
 #include "utils.h"
 #include <boost/functional/hash.hpp>
 #include <boost/ptr_container/ptr_vector.hpp>
 #include <boost/range/adaptor/sliced.hpp>
-#include <chrono>
 #include <limits>
 #include <memory>
 #include <queue>
diff --git a/src/libime/core/decoder.h b/src/libime/core/decoder.h
index ba894a0..1cfd8f5 100644
--- a/src/libime/core/decoder.h
+++ b/src/libime/core/decoder.h
@@ -7,19 +7,16 @@
 #define _FCITX_LIBIME_CORE_DECODER_H_
 
 #include "libimecore_export.h"
-#include <cstdint>
 #include <fcitx-utils/macros.h>
 #include <libime/core/dictionary.h>
 #include <libime/core/lattice.h>
 #include <libime/core/segmentgraph.h>
 #include <memory>
-#include <vector>
 
 namespace libime {
 
 class DecoderPrivate;
 class Dictionary;
-class LanguageModel;
 
 class LIBIMECORE_EXPORT Decoder {
     friend class DecoderPrivate;
diff --git a/src/libime/core/historybigram.cpp b/src/libime/core/historybigram.cpp
index d53ee02..97dba26 100644
--- a/src/libime/core/historybigram.cpp
+++ b/src/libime/core/historybigram.cpp
@@ -10,12 +10,10 @@
 #include "zstdfilter.h"
 #include <boost/algorithm/cxx11/all_of.hpp>
 #include <boost/algorithm/string.hpp>
-#include <boost/iostreams/filtering_streambuf.hpp>
 #include <boost/range/adaptor/reversed.hpp>
 #include <boost/range/adaptor/transformed.hpp>
 #include <boost/range/algorithm.hpp>
 #include <cmath>
-#include <fcitx-utils/log.h>
 #include <fcitx-utils/stringutils.h>
 #include <iterator>
 #include <ostream>
diff --git a/src/libime/core/historybigram.h b/src/libime/core/historybigram.h
index 2dfd7e9..f2abab4 100644
--- a/src/libime/core/historybigram.h
+++ b/src/libime/core/historybigram.h
@@ -17,7 +17,6 @@
 namespace libime {
 
 class HistoryBigramPrivate;
-class HistoryBigram;
 
 class LIBIMECORE_EXPORT HistoryBigram {
 public:
diff --git a/src/libime/core/inputbuffer.cpp b/src/libime/core/inputbuffer.cpp
index 362b46c..5abb0c9 100644
--- a/src/libime/core/inputbuffer.cpp
+++ b/src/libime/core/inputbuffer.cpp
@@ -4,12 +4,7 @@
  * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 #include "inputbuffer.h"
-#include <boost/iterator/function_input_iterator.hpp>
-#include <boost/range/iterator_range.hpp>
-#include <exception>
 #include <fcitx-utils/utf8.h>
-#include <numeric>
-#include <vector>
 
 namespace libime {
 
diff --git a/src/libime/core/inputbuffer.h b/src/libime/core/inputbuffer.h
index 2ecb6eb..57516f3 100644
--- a/src/libime/core/inputbuffer.h
+++ b/src/libime/core/inputbuffer.h
@@ -9,8 +9,6 @@
 #include "libimecore_export.h"
 #include <boost/iterator/iterator_facade.hpp>
 #include <fcitx-utils/inputbuffer.h>
-#include <fcitx-utils/macros.h>
-#include <memory>
 #include <string_view>
 
 namespace libime {
diff --git a/src/libime/core/lattice.h b/src/libime/core/lattice.h
index 8c94ee4..a2fba04 100644
--- a/src/libime/core/lattice.h
+++ b/src/libime/core/lattice.h
@@ -9,7 +9,6 @@
 #include "libimecore_export.h"
 #include <algorithm>
 #include <boost/range/adaptor/transformed.hpp>
-#include <boost/range/adaptor/type_erased.hpp>
 #include <fcitx-utils/macros.h>
 #include <fcitx-utils/stringutils.h>
 #include <libime/core/languagemodel.h>
@@ -19,10 +18,7 @@
 
 namespace libime {
 
-class Decoder;
 class LatticePrivate;
-class SegmentGraphNode;
-class SegmentGraph;
 class LatticeNode;
 
 class SentenceResult {
diff --git a/src/libime/core/segmentgraph.cpp b/src/libime/core/segmentgraph.cpp
index 51b0079..41cd490 100644
--- a/src/libime/core/segmentgraph.cpp
+++ b/src/libime/core/segmentgraph.cpp
@@ -6,9 +6,7 @@
 
 #include "segmentgraph.h"
 #include "lattice_p.h"
-#include <boost/algorithm/string.hpp>
 #include <boost/range/combine.hpp>
-#include <iostream>
 #include <queue>
 
 namespace libime {
diff --git a/src/libime/core/segmentgraph.h b/src/libime/core/segmentgraph.h
index ccb1185..23c9a51 100644
--- a/src/libime/core/segmentgraph.h
+++ b/src/libime/core/segmentgraph.h
@@ -8,21 +8,16 @@
 
 #include "libimecore_export.h"
 #include <boost/iterator/transform_iterator.hpp>
-#include <boost/ptr_container/ptr_list.hpp>
 #include <boost/range/adaptor/type_erased.hpp>
-#include <boost/range/iterator_range.hpp>
 #include <fcitx-utils/element.h>
 #include <functional>
 #include <list>
 #include <string_view>
-#include <unordered_map>
 #include <unordered_set>
 
 namespace libime {
 
-class Lattice;
 class SegmentGraphBase;
-class SegmentGraph;
 class SegmentGraphNode;
 typedef std::function<bool(const SegmentGraphBase &graph,
                            const std::vector<size_t> &)>
diff --git a/src/libime/core/triedictionary.cpp b/src/libime/core/triedictionary.cpp
index eaad4ea..d235abf 100644
--- a/src/libime/core/triedictionary.cpp
+++ b/src/libime/core/triedictionary.cpp
@@ -7,18 +7,8 @@
 #include "triedictionary.h"
 
 #include "libime/core/datrie.h"
-#include "libime/core/lattice.h"
-#include "libime/core/lrucache.h"
-#include "libime/core/utils.h"
-#include <boost/algorithm/string.hpp>
 #include <boost/ptr_container/ptr_vector.hpp>
-#include <boost/unordered_map.hpp>
-#include <cmath>
-#include <fstream>
-#include <iomanip>
-#include <queue>
 #include <string_view>
-#include <type_traits>
 
 namespace libime {
 
diff --git a/src/libime/core/userlanguagemodel.cpp b/src/libime/core/userlanguagemodel.cpp
index bfb228b..c60a18f 100644
--- a/src/libime/core/userlanguagemodel.cpp
+++ b/src/libime/core/userlanguagemodel.cpp
@@ -8,7 +8,6 @@
 #include "constants.h"
 #include "historybigram.h"
 #include "lm/model.hh"
-#include "utils.h"
 #include "utils_p.h"
 #include <cmath>
 
diff --git a/src/libime/core/userlanguagemodel.h b/src/libime/core/userlanguagemodel.h
index 9958d3a..b9592a7 100644
--- a/src/libime/core/userlanguagemodel.h
+++ b/src/libime/core/userlanguagemodel.h
@@ -7,7 +7,6 @@
 #define _FCITX_LIBIME_CORE_USERLANGUAGEMODEL_H_
 
 #include "libimecore_export.h"
-#include <fcitx-utils/connectableobject.h>
 #include <libime/core/languagemodel.h>
 
 namespace libime {
diff --git a/src/libime/pinyin/pinyincontext.cpp b/src/libime/pinyin/pinyincontext.cpp
index fe00cb9..3c25c6e 100644
--- a/src/libime/pinyin/pinyincontext.cpp
+++ b/src/libime/pinyin/pinyincontext.cpp
@@ -13,7 +13,6 @@
 #include "pinyinmatchstate.h"
 #include <algorithm>
 #include <fcitx-utils/charutils.h>
-#include <fcitx-utils/log.h>
 #include <fcitx-utils/utf8.h>
 #include <iterator>
 #include <stdexcept>
diff --git a/src/libime/pinyin/pinyincontext.h b/src/libime/pinyin/pinyincontext.h
index a534d25..aae6e85 100644
--- a/src/libime/pinyin/pinyincontext.h
+++ b/src/libime/pinyin/pinyincontext.h
@@ -18,7 +18,6 @@
 namespace libime {
 class PinyinIME;
 class PinyinContextPrivate;
-class LatticeNode;
 enum class PinyinPreeditMode;
 
 class LIBIMEPINYIN_EXPORT PinyinContext : public InputBuffer {
diff --git a/src/libime/pinyin/pinyindata.cpp b/src/libime/pinyin/pinyindata.cpp
index 057fa93..5b90ad0 100644
--- a/src/libime/pinyin/pinyindata.cpp
+++ b/src/libime/pinyin/pinyindata.cpp
@@ -8,6 +8,9 @@
 #include "pinyinencoder.h"
 #include <boost/algorithm/string/predicate.hpp>
 #include <fcitx-utils/stringutils.h>
+#include <unordered_map>
+#include <unordered_set>
+#include <utility>
 
 namespace libime {
 
diff --git a/src/libime/pinyin/pinyindictionary.cpp b/src/libime/pinyin/pinyindictionary.cpp
index a0e08e3..93de9bd 100644
--- a/src/libime/pinyin/pinyindictionary.cpp
+++ b/src/libime/pinyin/pinyindictionary.cpp
@@ -15,9 +15,6 @@
 #include "pinyinencoder.h"
 #include "pinyinmatchstate_p.h"
 #include <boost/algorithm/string.hpp>
-#include <boost/iostreams/filtering_streambuf.hpp>
-#include <boost/ptr_container/ptr_vector.hpp>
-#include <boost/unordered_map.hpp>
 #include <cmath>
 #include <fstream>
 #include <iomanip>
diff --git a/src/libime/pinyin/pinyindictionary.h b/src/libime/pinyin/pinyindictionary.h
index 158c516..703eea6 100644
--- a/src/libime/pinyin/pinyindictionary.h
+++ b/src/libime/pinyin/pinyindictionary.h
@@ -7,7 +7,6 @@
 #define _FCITX_LIBIME_PINYIN_PINYINDICTIONARY_H_
 
 #include "libimepinyin_export.h"
-#include <fcitx-utils/connectableobject.h>
 #include <fcitx-utils/macros.h>
 #include <libime/core/triedictionary.h>
 #include <libime/pinyin/pinyinencoder.h>
@@ -22,7 +21,6 @@ class PinyinDictionaryPrivate;
 typedef std::function<bool(std::string_view encodedPinyin,
                            std::string_view hanzi, float cost)>
     PinyinMatchCallback;
-class PinyinDictionary;
 
 using PinyinTrie = typename TrieDictionary::TrieType;
 
diff --git a/src/libime/pinyin/pinyinencoder.cpp b/src/libime/pinyin/pinyinencoder.cpp
index aa60640..fc8b05e 100644
--- a/src/libime/pinyin/pinyinencoder.cpp
+++ b/src/libime/pinyin/pinyinencoder.cpp
@@ -10,7 +10,6 @@
 #include <algorithm>
 #include <boost/algorithm/string.hpp>
 #include <boost/bimap.hpp>
-#include <boost/bimap/unordered_set_of.hpp>
 #include <boost/container/static_vector.hpp>
 #include <fcitx-utils/charutils.h>
 #include <functional>
diff --git a/src/libime/pinyin/shuangpinprofile.cpp b/src/libime/pinyin/shuangpinprofile.cpp
index b54ebb8..a3ee00e 100644
--- a/src/libime/pinyin/shuangpinprofile.cpp
+++ b/src/libime/pinyin/shuangpinprofile.cpp
@@ -8,9 +8,7 @@
 #include "pinyinencoder.h"
 #include "shuangpindata.h"
 #include <boost/algorithm/string.hpp>
-#include <exception>
 #include <fcitx-utils/charutils.h>
-#include <iostream>
 #include <set>
 #include <string_view>
 #include <unordered_map>
diff --git a/src/libime/pinyin/shuangpinprofile.h b/src/libime/pinyin/shuangpinprofile.h
index 95e9e34..922bd0a 100644
--- a/src/libime/pinyin/shuangpinprofile.h
+++ b/src/libime/pinyin/shuangpinprofile.h
@@ -14,7 +14,6 @@
 #include <memory>
 #include <set>
 #include <string>
-#include <unordered_map>
 
 namespace libime {
 
diff --git a/src/libime/table/autophrasedict.h b/src/libime/table/autophrasedict.h
index 1af0fcd..8c8a63d 100644
--- a/src/libime/table/autophrasedict.h
+++ b/src/libime/table/autophrasedict.h
@@ -12,7 +12,6 @@
 #include <functional>
 #include <istream>
 #include <memory>
-#include <ostream>
 #include <string>
 #include <string_view>
 
diff --git a/src/libime/table/tablebaseddictionary.cpp b/src/libime/table/tablebaseddictionary.cpp
index c8a679a..4cfbf5c 100644
--- a/src/libime/table/tablebaseddictionary.cpp
+++ b/src/libime/table/tablebaseddictionary.cpp
@@ -16,18 +16,14 @@
 #include "tableoptions.h"
 #include "tablerule.h"
 #include <algorithm>
-#include <boost/algorithm/string.hpp>
-#include <boost/iostreams/filtering_streambuf.hpp>
 #include <boost/range/adaptor/reversed.hpp>
 #include <cassert>
-#include <chrono>
 #include <cstdint>
 #include <cstring>
 #include <fcitx-utils/log.h>
 #include <fcitx-utils/stringutils.h>
 #include <fcitx-utils/utf8.h>
 #include <fstream>
-#include <istream>
 #include <set>
 #include <stdexcept>
 #include <string>
diff --git a/src/libime/table/tablecontext.cpp b/src/libime/table/tablecontext.cpp
index 86a1f53..2b7c18a 100644
--- a/src/libime/table/tablecontext.cpp
+++ b/src/libime/table/tablecontext.cpp
@@ -5,7 +5,6 @@
  */
 #include "tablecontext.h"
 #include "constants.h"
-#include "libime/core/decoder.h"
 #include "libime/core/historybigram.h"
 #include "libime/core/segmentgraph.h"
 #include "libime/core/userlanguagemodel.h"
@@ -15,10 +14,7 @@
 #include "tabledecoder.h"
 #include "tableoptions.h"
 #include "tablerule.h"
-#include <boost/ptr_container/ptr_vector.hpp>
-#include <chrono>
 #include <fcitx-utils/log.h>
-#include <fcitx-utils/stringutils.h>
 #include <fcitx-utils/utf8.h>
 #include <regex>
 
diff --git a/src/libime/table/tablecontext.h b/src/libime/table/tablecontext.h
index d182231..12dc5ba 100644
--- a/src/libime/table/tablecontext.h
+++ b/src/libime/table/tablecontext.h
@@ -10,10 +10,8 @@
 /// \brief Class provide input method support for table-based ones, like wubi.
 
 #include "libimetable_export.h"
-#include <fcitx-utils/connectableobject.h>
 #include <fcitx-utils/macros.h>
 #include <libime/core/inputbuffer.h>
-#include <libime/core/lattice.h>
 #include <libime/table/tablebaseddictionary.h>
 #include <string_view>
 #include <tuple>
diff --git a/src/libime/table/tabledecoder.cpp b/src/libime/table/tabledecoder.cpp
index dd5b468..bf474ec 100644
--- a/src/libime/table/tabledecoder.cpp
+++ b/src/libime/table/tabledecoder.cpp
@@ -8,7 +8,6 @@
 #include "tableoptions.h"
 #include "tablerule.h"
 #include <boost/range/adaptor/filtered.hpp>
-#include <cmath>
 #include <fcitx-utils/utf8.h>
 
 namespace libime {
diff --git a/src/libime/table/tablerule.h b/src/libime/table/tablerule.h
index 72dbd77..59aede5 100644
--- a/src/libime/table/tablerule.h
+++ b/src/libime/table/tablerule.h
@@ -14,11 +14,7 @@
 #include <fcitx-utils/charutils.h>
 #include <iostream>
 #include <libime/core/utils.h>
-#include <limits>
-#include <sstream>
-#include <stdexcept>
 #include <string>
-#include <string_view>
 #include <vector>
 
 namespace libime {
diff --git a/test/testmodel.cpp b/test/testmodel.cpp
index b20b3bc..d16e355 100644
--- a/test/testmodel.cpp
+++ b/test/testmodel.cpp
@@ -8,7 +8,6 @@
 #include "libime/core/lattice.h"
 #include "testdir.h"
 #include <cmath>
-#include <fcitx-utils/log.h>
 
 int main() {
     using namespace libime;
diff --git a/test/testpinyincontext.cpp b/test/testpinyincontext.cpp
index 3485474..bf07617 100644
--- a/test/testpinyincontext.cpp
+++ b/test/testpinyincontext.cpp
@@ -13,9 +13,7 @@
 #include "libime/pinyin/pinyinime.h"
 #include "testdir.h"
 #include <array>
-#include <boost/range/adaptor/transformed.hpp>
 #include <fcitx-utils/log.h>
-#include <fcitx-utils/stringutils.h>
 #include <sstream>
 
 using namespace libime;
diff --git a/test/testpinyindictionary.cpp b/test/testpinyindictionary.cpp
index a1c8854..216d7dd 100644
--- a/test/testpinyindictionary.cpp
+++ b/test/testpinyindictionary.cpp
@@ -7,7 +7,6 @@
 #include "libime/pinyin/pinyindictionary.h"
 #include "libime/pinyin/pinyinencoder.h"
 #include "testdir.h"
-#include "testutils.h"
 #include <fcitx-utils/log.h>
 #include <sstream>
 
diff --git a/test/testpinyinime.cpp b/test/testpinyinime.cpp
index 26e877f..3130658 100644
--- a/test/testpinyinime.cpp
+++ b/test/testpinyinime.cpp
@@ -15,15 +15,11 @@
 #include "libime/pinyin/shuangpinprofile.h"
 #include "testdir.h"
 #include "testutils.h"
-#include <boost/algorithm/string.hpp>
 #include <boost/iostreams/device/null.hpp>
 #include <boost/iostreams/stream.hpp>
-#include <boost/range/adaptor/transformed.hpp>
 #include <fcitx-utils/log.h>
-#include <fcitx-utils/stringutils.h>
 #include <fstream>
 #include <functional>
-#include <sstream>
 
 using namespace libime;
 
diff --git a/test/testpinyinprediction.cpp b/test/testpinyinprediction.cpp
index 1c42566..429b243 100644
--- a/test/testpinyinprediction.cpp
+++ b/test/testpinyinprediction.cpp
@@ -9,9 +9,7 @@
 #include "libime/pinyin/pinyinencoder.h"
 #include "libime/pinyin/pinyinprediction.h"
 #include "testdir.h"
-#include "testutils.h"
 #include <fcitx-utils/log.h>
-#include <sstream>
 
 using namespace libime;
 
diff --git a/test/testprediction.cpp b/test/testprediction.cpp
index 1bf4c32..561e3c7 100644
--- a/test/testprediction.cpp
+++ b/test/testprediction.cpp
@@ -5,18 +5,9 @@
  */
 
 #include "libime/core/historybigram.h"
-#include "libime/core/languagemodel.h"
 #include "libime/core/prediction.h"
 #include "testdir.h"
-#include "testutils.h"
-#include <boost/algorithm/string.hpp>
-#include <boost/iostreams/device/null.hpp>
-#include <boost/iostreams/stream.hpp>
-#include <boost/range/adaptor/transformed.hpp>
 #include <fcitx-utils/log.h>
-#include <fcitx-utils/stringutils.h>
-#include <fstream>
-#include <functional>
 
 using namespace libime;
 
diff --git a/test/testtableime_unit.cpp b/test/testtableime_unit.cpp
index d797d51..5ebf39e 100644
--- a/test/testtableime_unit.cpp
+++ b/test/testtableime_unit.cpp
@@ -7,10 +7,8 @@
 #include "libime/core/userlanguagemodel.h"
 #include "libime/table/tablebaseddictionary.h"
 #include "libime/table/tablecontext.h"
-#include "libime/table/tabledecoder.h"
 #include "libime/table/tableoptions.h"
 #include "testdir.h"
-#include "testutils.h"
 #include <fcitx-utils/log.h>
 
 using namespace libime;
diff --git a/test/testtrie.cpp b/test/testtrie.cpp
index f76e58f..b811850 100644
--- a/test/testtrie.cpp
+++ b/test/testtrie.cpp
@@ -4,7 +4,6 @@
  * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 #include "libime/core/datrie.h"
-#include <cmath>
 #include <cstring>
 #include <fcitx-utils/log.h>
 
diff --git a/test/testusermodel.cpp b/test/testusermodel.cpp
index e128eae..3bdeae2 100644
--- a/test/testusermodel.cpp
+++ b/test/testusermodel.cpp
@@ -9,7 +9,6 @@
 #include "libime/core/userlanguagemodel.h"
 #include "testdir.h"
 #include <cmath>
-#include <fcitx-utils/log.h>
 #include <fstream>
 #include <list>
 
diff --git a/test/triebench.cpp b/test/triebench.cpp
index aef8f75..29ed1b6 100644
--- a/test/triebench.cpp
+++ b/test/triebench.cpp
@@ -5,8 +5,6 @@
  */
 #include "libime/core/datrie.h"
 #include <fcitx-utils/log.h>
-#include <fcntl.h>
-#include <fstream>
 #include <string>
 #include <unistd.h>
 #include <unordered_map>
diff --git a/tools/libime_history.cpp b/tools/libime_history.cpp
index 6f4c5a3..279ba0d 100644
--- a/tools/libime_history.cpp
+++ b/tools/libime_history.cpp
@@ -7,7 +7,7 @@
 #include "libime/core/historybigram.h"
 #include <exception>
 #include <fstream>
-#include <getopt.h>
+#include <unistd.h>
 #include <iostream>
 
 void usage(const char *argv0) {
diff --git a/tools/libime_migrate_fcitx4_pinyin.cpp b/tools/libime_migrate_fcitx4_pinyin.cpp
index f8a2443..54ee35c 100644
--- a/tools/libime_migrate_fcitx4_pinyin.cpp
+++ b/tools/libime_migrate_fcitx4_pinyin.cpp
@@ -9,11 +9,9 @@
 #include "libime/core/utils.h"
 #include "libime/core/utils_p.h"
 #include "libime/pinyin/pinyindictionary.h"
-#include "libime/pinyin/pinyinencoder.h"
 #include <array>
 #include <boost/iostreams/device/file_descriptor.hpp>
 #include <boost/iostreams/stream.hpp>
-#include <fcitx-utils/cutf8.h>
 #include <fcitx-utils/standardpath.h>
 #include <fcntl.h>
 #include <iostream>
diff --git a/tools/libime_migrate_fcitx4_table.cpp b/tools/libime_migrate_fcitx4_table.cpp
index 298324c..ea78869 100644
--- a/tools/libime_migrate_fcitx4_table.cpp
+++ b/tools/libime_migrate_fcitx4_table.cpp
@@ -15,9 +15,7 @@
 #include <fcitx-utils/charutils.h>
 #include <fcitx-utils/standardpath.h>
 #include <fcntl.h>
-#include <istream>
 #include <sstream>
-#include <stdexcept>
 
 #if __GNUC__ <= 8
 #include <boost/filesystem.hpp>
diff --git a/tools/libime_pinyindict.cpp b/tools/libime_pinyindict.cpp
index 79c40ee..738b0c7 100644
--- a/tools/libime_pinyindict.cpp
+++ b/tools/libime_pinyindict.cpp
@@ -6,10 +6,9 @@
 
 #include "libime/core/utils.h"
 #include "libime/pinyin/pinyindictionary.h"
-#include "libime/pinyin/pinyinencoder.h"
 #include <fcitx-utils/log.h>
 #include <fstream>
-#include <getopt.h>
+#include <unistd.h>
 #include <iostream>
 
 void usage(const char *argv0) {
diff --git a/tools/libime_prediction.cpp b/tools/libime_prediction.cpp
index faa11a4..882ed20 100644
--- a/tools/libime_prediction.cpp
+++ b/tools/libime_prediction.cpp
@@ -11,7 +11,7 @@
 #include <cmath>
 #include <fcitx-utils/log.h>
 #include <fstream>
-#include <getopt.h>
+#include <unistd.h>
 #include <iostream>
 #include <string>
 #include <unordered_map>
diff --git a/tools/libime_tabledict.cpp b/tools/libime_tabledict.cpp
index 6c4d455..17b560f 100644
--- a/tools/libime_tabledict.cpp
+++ b/tools/libime_tabledict.cpp
@@ -6,11 +6,10 @@
 
 #include "libime/table/tablebaseddictionary.h"
 #include <fstream>
-#include <getopt.h>
+#include <unistd.h>
 #include <iostream>
 #include <optional>
 #include <string>
-#include <tuple>
 
 void usage(const char *argv0) {
     std::cout << "Usage: " << argv0