diff --git a/annofabcli/__version__.py b/annofabcli/__version__.py
index 11ab8212..6ba9a679 100644
--- a/annofabcli/__version__.py
+++ b/annofabcli/__version__.py
@@ -1 +1 @@
-__version__ = "1.73.0"
+__version__ = "1.73.1"
diff --git a/annofabcli/stat_visualization/mask_visualization_dir.py b/annofabcli/stat_visualization/mask_visualization_dir.py
index 651ff5ae..054044a1 100755
--- a/annofabcli/stat_visualization/mask_visualization_dir.py
+++ b/annofabcli/stat_visualization/mask_visualization_dir.py
@@ -108,8 +108,8 @@ def mask_visualization_dir(
     exclude_masked_user_for_line_graph: bool = False,
 ) -> None:
     user_performance = project_dir.read_user_performance()
-    if user_performance.empty():
-        logger.warning(f"メンバごとの生産性と品質情報が空であるため、ユーザー情報をマスクできません。終了します。")
+    if user_performance.is_empty():
+        logger.warning("メンバごとの生産性と品質情報が空であるため、ユーザー情報をマスクできません。終了します。")
         return
 
     # マスクするユーザの情報を取得する
diff --git a/pyproject.toml b/pyproject.toml
index f44929fd..4bd19498 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "annofabcli"
-version = "1.73.0"
+version = "1.73.1"
 description = "Utility Command Line Interface for AnnoFab"
 authors = ["yuji38kwmt"]
 license = "MIT"