diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index b8ffb7d4..cfc67cf2 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -39,7 +39,7 @@ ENV PIPX_BIN_DIR=/usr/local/bin
 ENV PIPX_DEFAULT_PYTHON=/usr/local/bin/python
 
 # Install pdm
-RUN pipx install pdm==2.15.3
+RUN pipx install pdm==2.15.4
 
 # Install pre-commit
 RUN if [ "${PYTHON_VERSION}" = "3.8" ]; then \
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 94cd07f3..fb81aaf1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -22,7 +22,7 @@ jobs:
         with:
           cache: true
           python-version: ${{ matrix.python-version }}
-          version: 2.15.3
+          version: 2.15.4
       - run: env | sort
       - run: make dev
       - run: make lint test doc build
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index f258b4bf..7708bdc7 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -20,7 +20,7 @@ jobs:
         with:
           cache: true
           python-version: '3.12'
-          version: 2.15.3
+          version: 2.15.4
       - run: env | sort
       - run: make dev-doc
       - run: make doc
@@ -110,7 +110,7 @@ jobs:
         with:
           cache: true
           python-version: '3.12'
-          version: 2.15.3
+          version: 2.15.4
       - run: env | sort
       - env:
           PDM_PUBLISH_PASSWORD: ${{ secrets.PDM_PUBLISH_PASSWORD }}
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 5787fa68..ecf333f8 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -21,8 +21,8 @@ build:
       - env | sort
     pre_create_environment:
       - asdf plugin add pdm
-      - asdf install pdm 2.15.3
-      - asdf global pdm 2.15.3
+      - asdf install pdm 2.15.4
+      - asdf global pdm 2.15.4
     post_install:
       - VIRTUAL_ENV=$READTHEDOCS_VIRTUALENV_PATH make dev-doc
     post_build:
diff --git a/.renovaterc.json b/.renovaterc.json
index b8fd1c41..bbdb97e9 100644
--- a/.renovaterc.json
+++ b/.renovaterc.json
@@ -1,7 +1,7 @@
 {
     "$schema": "https://docs.renovatebot.com/renovate-schema.json",
     "constraints": {
-        "pdm": "2.15.3",
+        "pdm": "2.15.4",
         "python": "==3.12"
     },
     "customManagers": [
diff --git a/README.md b/README.md
index c15105cd..835cc978 100644
--- a/README.md
+++ b/README.md
@@ -61,7 +61,7 @@ Certain system-level Python applications are needed and it is recommended to use
 # Copier: Template rendering for projects.
 pipx install copier==9.2.0
 # PDM: A modern Python package and dependency manager supporting the latest PEP standards.
-pipx install pdm==2.15.3
+pipx install pdm==2.15.4
 # Pre-commit: Automates Git hooks for code quality checks.
 pipx install pre-commit==3.7.1
 ```
diff --git a/docs/development/setup-dev-env.md b/docs/development/setup-dev-env.md
index 7de20deb..a40c02d0 100644
--- a/docs/development/setup-dev-env.md
+++ b/docs/development/setup-dev-env.md
@@ -12,7 +12,7 @@ Using `pipx` for management is recommended and you can find pipx's installation
 
 ```bash
 # PDM: A modern Python package and dependency manager supporting the latest PEP standards.
-pipx install pdm==2.15.3
+pipx install pdm==2.15.4
 # Pre-commit: Automates Git hooks for code quality checks.
 pipx install pre-commit==3.7.1
 ```
diff --git a/includes/sample.jinja b/includes/sample.jinja
index 401af068..ebdc7b4d 100644
--- a/includes/sample.jinja
+++ b/includes/sample.jinja
@@ -39,7 +39,7 @@ Certain system-level Python applications are needed and it is recommended to use
 # Copier: Template rendering for projects.
 pipx install copier==9.2.0
 # PDM: A modern Python package and dependency manager supporting the latest PEP standards.
-pipx install pdm==2.15.3
+pipx install pdm==2.15.4
 # Pre-commit: Automates Git hooks for code quality checks.
 pipx install pre-commit==3.7.1
 ```
diff --git a/template/.devcontainer/Dockerfile.jinja b/template/.devcontainer/Dockerfile.jinja
index aeff25e8..862852ab 100644
--- a/template/.devcontainer/Dockerfile.jinja
+++ b/template/.devcontainer/Dockerfile.jinja
@@ -39,7 +39,7 @@ ENV PIPX_BIN_DIR=/usr/local/bin
 ENV PIPX_DEFAULT_PYTHON=/usr/local/bin/python
 
 # Install pdm
-RUN pipx install pdm==2.15.3
+RUN pipx install pdm==2.15.4
 
 # Install pre-commit
 RUN if [ "${PYTHON_VERSION}" = "3.8" ]; then \
diff --git a/template/.readthedocs.yaml.jinja b/template/.readthedocs.yaml.jinja
index 84d5d5db..22c91fb0 100644
--- a/template/.readthedocs.yaml.jinja
+++ b/template/.readthedocs.yaml.jinja
@@ -21,8 +21,8 @@ build:
       - env | sort
     pre_create_environment:
       - asdf plugin add pdm
-      - asdf install pdm 2.15.3
-      - asdf global pdm 2.15.3
+      - asdf install pdm 2.15.4
+      - asdf global pdm 2.15.4
     post_install:
       - VIRTUAL_ENV=$READTHEDOCS_VIRTUALENV_PATH make dev-doc
     post_build:
diff --git a/template/.renovaterc.json.jinja b/template/.renovaterc.json.jinja
index a8e04427..888c6153 100644
--- a/template/.renovaterc.json.jinja
+++ b/template/.renovaterc.json.jinja
@@ -2,7 +2,7 @@
 {
     "$schema": "https://docs.renovatebot.com/renovate-schema.json",
     "constraints": {
-        "pdm": "2.15.3",
+        "pdm": "2.15.4",
         "python": "=={{ default_py }}"
     },
     "customManagers": [
diff --git a/template/[% if repo_platform == 'github' %].github[% endif %]/workflows/ci.yml.jinja b/template/[% if repo_platform == 'github' %].github[% endif %]/workflows/ci.yml.jinja
index ac48c15b..19e252b1 100644
--- a/template/[% if repo_platform == 'github' %].github[% endif %]/workflows/ci.yml.jinja	
+++ b/template/[% if repo_platform == 'github' %].github[% endif %]/workflows/ci.yml.jinja	
@@ -23,7 +23,7 @@ jobs:
         with:
           cache: true
           python-version: {{ '${{ matrix.python-version }}' }}
-          version: 2.15.3
+          version: 2.15.4
       - run: env | sort
       - run: make dev
       - run: make lint test doc build
diff --git a/template/[% if repo_platform == 'github' %].github[% endif %]/workflows/release.yml.jinja b/template/[% if repo_platform == 'github' %].github[% endif %]/workflows/release.yml.jinja
index 99171f22..2925af7d 100644
--- a/template/[% if repo_platform == 'github' %].github[% endif %]/workflows/release.yml.jinja	
+++ b/template/[% if repo_platform == 'github' %].github[% endif %]/workflows/release.yml.jinja	
@@ -21,7 +21,7 @@ jobs:
         with:
           cache: true
           python-version: '{{ default_py }}'
-          version: 2.15.3
+          version: 2.15.4
       - run: env | sort
       - run: make dev-doc
       - run: make doc
@@ -121,7 +121,7 @@ jobs:
         with:
           cache: true
           python-version: '{{ default_py }}'
-          version: 2.15.3
+          version: 2.15.4
       - run: env | sort
       - env:
           PDM_PUBLISH_PASSWORD: {{ '${{ secrets.PDM_PUBLISH_PASSWORD }}' }}
diff --git a/template/docs/development/setup-dev-env.md b/template/docs/development/setup-dev-env.md
index 7de20deb..a40c02d0 100644
--- a/template/docs/development/setup-dev-env.md
+++ b/template/docs/development/setup-dev-env.md
@@ -12,7 +12,7 @@ Using `pipx` for management is recommended and you can find pipx's installation
 
 ```bash
 # PDM: A modern Python package and dependency manager supporting the latest PEP standards.
-pipx install pdm==2.15.3
+pipx install pdm==2.15.4
 # Pre-commit: Automates Git hooks for code quality checks.
 pipx install pre-commit==3.7.1
 ```