diff --git a/README.md b/README.md
index f27423d..deb2411 100644
--- a/README.md
+++ b/README.md
@@ -36,3 +36,4 @@ All of the streams and topics are visible without logging in.
 If you like, please join it.
 
 We are discussing this project in [`#競プロ > ac-library-rs`](https://rust-lang-jp.zulipchat.com/#narrow/stream/334326-.E7.AB.B6.E3.83.97.E3.83.AD/topic/ac-library-rs).
+# puyopuyo-viewer
diff --git a/expand.py b/expand.py
index 283d6fb..c35829e 100755
--- a/expand.py
+++ b/expand.py
@@ -4,6 +4,7 @@
 import getopt
 import tempfile
 import subprocess
+import pathlib
 
 usage = '''Usage:expand.py [options] <output modules>
 Output Modules:
@@ -45,7 +46,7 @@
                    'scc': ('internal_scc',),
                    'segtree': ('internal_bit', 'internal_type_traits',),
                    'twosat': ('internal_scc',), }
-src_path = 'src/'
+src_path = pathlib.Path(sys.argv[0]).parent.joinpath('src')
 output_path = None
 
 
@@ -53,7 +54,7 @@ def output_file(filename):
     global src_path
 
     res = []
-    with open(src_path+filename+'.rs', 'r', encoding='utf-8', newline='') as f:
+    with open(src_path.joinpath(filename+'.rs'), 'r', encoding='utf-8', newline='') as f:
         res.append('pub mod {} {{'.format(filename))
 
         for line in f: