diff --git a/.github/actions/python-environment/action.yml b/.github/actions/python-environment/action.yml
index b8a5db9ed..934ee1976 100644
--- a/.github/actions/python-environment/action.yml
+++ b/.github/actions/python-environment/action.yml
@@ -52,17 +52,18 @@ runs:
 
     - name: Setup cache variables
       id: setup-cache-variables
+      working-directory: ${{ inputs.working-directory }}
       shell: bash
       run: |
         echo "ImageOS=$ImageOS"
         echo "ImageVersion=$ImageVersion"
         POETRY_ENV_PATH=$(poetry config virtualenvs.path)
-        POETRY_SHA=$(sha256sum poetry.lock | awk '{print $1}') #Remove trailing filename
-        echo "POETRY_ENV_PATH=$POETRY_ENV_PATH" >>  $GITHUB_OUTPUT
+        POETRY_SHA=$(cat pyproject.toml poetry.lock | sha256sum | cut -f 1 -d " ") #Remove trailing dash
+        # output to GITHUB_OUTPUT
         echo "IMAGE_OS=$ImageOS" >> $GITHUB_OUTPUT
         echo "IMAGE_VERSION=$ImageVersion" >> $GITHUB_OUTPUT
+        echo "POETRY_ENV_PATH=$POETRY_ENV_PATH" >>  $GITHUB_OUTPUT
         echo "POETRY_SHA=$POETRY_SHA" >> $GITHUB_OUTPUT
-        
 
     - name: Cache Poetry environment
       if: inputs.use-cache == 'true'
diff --git a/.github/actions/security-issues/action.yml b/.github/actions/security-issues/action.yml
index a4388bd07..10a591e59 100644
--- a/.github/actions/security-issues/action.yml
+++ b/.github/actions/security-issues/action.yml
@@ -39,7 +39,7 @@ runs:
     - name: Install Python Toolbox / Security tool
       shell: bash
       run: |
-        pip install exasol-toolbox==1.12.0
+        pip install exasol-toolbox==1.13.0
 
     - name: Create Security Issue Report
       shell: bash
diff --git a/doc/changes/changelog.md b/doc/changes/changelog.md
index b4332a83a..eeeda92ee 100644
--- a/doc/changes/changelog.md
+++ b/doc/changes/changelog.md
@@ -1,6 +1,7 @@
 # Changelog
 
 * [unreleased](unreleased.md)
+* [1.13.0](changes_1.13.0.md)
 * [1.12.0](changes_1.12.0.md)
 * [1.11.0](changes_1.11.0.md)
 * [1.10.0](changes_1.10.0.md)
@@ -49,6 +50,7 @@
 hidden:
 ---
 unreleased
+changes_1.13.0
 changes_1.12.0
 changes_1.11.0
 changes_1.10.0
diff --git a/doc/changes/changes_1.13.0.md b/doc/changes/changes_1.13.0.md
new file mode 100644
index 000000000..b09ac9d4a
--- /dev/null
+++ b/doc/changes/changes_1.13.0.md
@@ -0,0 +1,17 @@
+# 1.13.0 - 2025-10-31
+
+## Summary
+
+This releases fixes Nox session `release:prepare` for multi-project repositories and
+fixes the `python-environment` GitHub action to also use the `working-directory`
+and `pyproject.toml` setting the cache variables.
+
+## Bugfixes
+
+* #580: Fixed Nox session `release:prepare` for multi-project repositories
+* #586: Fixed `python-environment` GitHub action to use `working-directory` for setup of cache variables
+* #559: Added SHA of `pyproject.toml` to determine cache key in `python-environment` GitHub action
+
+## Features
+
+* #485: Improved nox task `release:trigger`
diff --git a/doc/changes/unreleased.md b/doc/changes/unreleased.md
index 154da4af5..79e701b84 100644
--- a/doc/changes/unreleased.md
+++ b/doc/changes/unreleased.md
@@ -1,13 +1 @@
 # Unreleased
-
-## Summary
-
-This releases fixes Nox session `release:prepare` for multi-project repositories.
-
-## Bugfixes
-
-* #580: Fixed Nox session `release:prepare` for multi-project repositories
-
-## Features
-
-* #485: Improved nox task `release:trigger`
diff --git a/exasol/toolbox/version.py b/exasol/toolbox/version.py
index 8842ebe86..fa812ffd3 100644
--- a/exasol/toolbox/version.py
+++ b/exasol/toolbox/version.py
@@ -9,7 +9,7 @@
 """
 
 MAJOR = 1
-MINOR = 12
+MINOR = 13
 PATCH = 0
 VERSION = f"{MAJOR}.{MINOR}.{PATCH}"
 __version__ = VERSION
diff --git a/pyproject.toml b/pyproject.toml
index c8ef4cad8..de4c6a1ca 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "exasol-toolbox"
-version = "1.12.0"
+version = "1.13.0"
 requires-python = ">=3.9.2,<4.0"
 description = "Your one-stop solution for managing all standard tasks and core workflows of your Python project."
 authors = [