diff --git a/Cargo.toml b/Cargo.toml
index b7aaeaa18..8078f9a97 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,5 +1,5 @@
 [workspace.package]
-version = "4.1.0"
+version = "4.2.0"
 
 [workspace]
 resolver = "2"
diff --git a/c2a_core_main.h b/c2a_core_main.h
index ed70863eb..74538f9a2 100644
--- a/c2a_core_main.h
+++ b/c2a_core_main.h
@@ -8,7 +8,7 @@ void C2A_core_main(void);
 // これらの番号は，リリース時に手動で合わせる
 // 詳細: docs/general/release.md
 #define C2A_CORE_VER_MAJOR (4)
-#define C2A_CORE_VER_MINOR (1)
+#define C2A_CORE_VER_MINOR (2)
 #define C2A_CORE_VER_PATCH (0)
 #define C2A_CORE_VER_PRE   ("")