diff --git a/doc/changelog.md b/doc/changelog.md
index 70523225..71a671f2 100644
--- a/doc/changelog.md
+++ b/doc/changelog.md
@@ -2,6 +2,10 @@
 
 # Change Log
 
+## Sep-24-2024: Version 3.5.2
+
+- Fix a memory leak.
+
 ## Sep-19-2024: Version 3.5.1
 
 - A small fix.
diff --git a/doc/conf.py b/doc/conf.py
index a4f00a21..f186e32a 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -60,7 +60,7 @@ copyright = "2015, Atsushi Togo"
 # The short X.Y version.
 version = "3.5"
 # The full version, including alpha/beta/rc tags.
-release = "3.5.1"
+release = "3.5.2"
 
 # 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 b8845155..d4df8bf1 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__ = "3.5.1"
+__version__ = "3.5.2"