diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 4ac692c9dbb476fc95bdcfca75699c13a2a2dfde..f194830106ffa000893761b3dc3221cdfb1712ae 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -19,6 +19,15 @@ earlier changes.
 
 .. towncrier release notes start
 
+v8.1.5 (2024-11-05)
+-------------------
+
+Other Tasks
+~~~~~~~~~~~
+
+- The Kubernetes apt key is updated. (`!1546 <https://gitlab.com/yaook/k8s/-/merge_requests/1546>`_)
+
+
 v8.1.4 (2024-10-23)
 -------------------
 
diff --git a/ci/hotfix-prepare.yaml b/ci/hotfix-prepare.yaml
index 3003f0bd8b2ccb9790e4314a76439807fb65e8be..b0aec01d697ba72e209951e0c2a9bedc4e511dde 100644
--- a/ci/hotfix-prepare.yaml
+++ b/ci/hotfix-prepare.yaml
@@ -15,6 +15,8 @@ add-hotfix-information:
     - git config --global user.email "${GITLAB_USER_EMAIL}"
     - git fetch origin "${CI_MERGE_REQUEST_SOURCE_BRANCH_NAME}"
     - git checkout "${SOURCE_BRANCH}"
+    - export VIRTUAL_ENV=$(poetry env info --path 2>/dev/null)
+    - export PATH="$VIRTUAL_ENV/bin:$PATH"
   script:
     # add version number (fix-release)
     - IFS=. read -ra CURRENT_VERSION < ./version
diff --git a/k8s-core/ansible/roles/k8s-packages/files/apt-key.gpg b/k8s-core/ansible/roles/k8s-packages/files/apt-key.gpg
index 469208ef10bfa72109527276820806f5db7986aa..70122c88cd35e5d4df9ffd5996132e35486c813a 100644
Binary files a/k8s-core/ansible/roles/k8s-packages/files/apt-key.gpg and b/k8s-core/ansible/roles/k8s-packages/files/apt-key.gpg differ
diff --git a/version b/version
index ac2895c59674575238b0f575e64ef621ec3d4b31..ee0f68991534c478f92a321548bc05a8c8c0bc44 100644
--- a/version
+++ b/version
@@ -1 +1 @@
-8.1.4
+8.1.5