diff --git a/CITATION.cff b/CITATION.cff
index c769f96..2e281a4 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -3,8 +3,8 @@ message: "If you use this software, please cite it as below."
 
 title: "dems"
 abstract: "DESHIMA measurement set"
-version: 0.5.0
-date-released: 2023-10-16
+version: 0.6.0
+date-released: 2023-10-20
 license: "MIT"
 doi: "10.5281/zenodo.8151950"
 url: "https://github.com/deshima-dev/dems"
diff --git a/dems/__init__.py b/dems/__init__.py
index 513a809..b81f8d1 100644
--- a/dems/__init__.py
+++ b/dems/__init__.py
@@ -1,5 +1,5 @@
 __all__ = ["d1", "d2"]
-__version__ = "0.5.0"
+__version__ = "0.6.0"
 
 
 # submodules
diff --git a/dems/d2.py b/dems/d2.py
index 5aded83..4ffe8a1 100644
--- a/dems/d2.py
+++ b/dems/d2.py
@@ -23,7 +23,7 @@
     -2475718.801708271,
 )
 DEMS_VERSION = __version__
-DEMERGE_VERSION = "1.0.0"
+DEMERGE_VERSION = "2.0.0"
 
 
 @dataclass
diff --git a/pyproject.toml b/pyproject.toml
index 3271333..2d5dcd8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "dems"
-version = "0.5.0"
+version = "0.6.0"
 description = "DESHIMA measurement set"
 authors = ["Akio Taniguchi <taniguchi@a.phys.nagoya-u.ac.jp>"]
 license = "MIT"