diff --git a/doc/changelog.md b/doc/changelog.md
index 3bd42254..df2f26b7 100644
--- a/doc/changelog.md
+++ b/doc/changelog.md
@@ -2,6 +2,10 @@
 
 # Change Log
 
+## Jun-7-2024: Version 3.0.4
+
+- Bug fix when handling different supercell size of fc2 than that of fc3.
+
 ## May-4-2024: Version 3.0.3
 
 - Release to follow the update of phonopy.
diff --git a/doc/conf.py b/doc/conf.py
index e4c57601..983941ac 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -60,7 +60,7 @@
 # The short X.Y version.
 version = "3.0"
 # The full version, including alpha/beta/rc tags.
-release = "3.0.3"
+release = "3.0.4"
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/phono3py/version.py b/phono3py/version.py
index 3426bb80..a334d571 100644
--- a/phono3py/version.py
+++ b/phono3py/version.py
@@ -34,4 +34,4 @@
 # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 # POSSIBILITY OF SUCH DAMAGE.
 
-__version__ = "3.0.3"
+__version__ = "3.0.4"