diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 0b73bab7..a58816e2 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -32,7 +32,7 @@ concurrency:
 
 env:
   REPORTS_DIR: CI_reports
-  PYTHON_VERSION: "3.14"
+  PYTHON_VERSION: "3.15"
   POETRY_VERSION: "1.8.1"
 
 permissions: {}
diff --git a/.github/workflows/python.yml b/.github/workflows/python.yml
index e5086ab1..c55e8d66 100644
--- a/.github/workflows/python.yml
+++ b/.github/workflows/python.yml
@@ -36,7 +36,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  PYTHON_VERSION_DEFAULT: "3.14"
+  PYTHON_VERSION_DEFAULT: "3.15"
   POETRY_VERSION: "1.8.1"
   REPORTS_DIR: CI_reports
   TESTS_REPORTS_ARTIFACT: tests-reports
@@ -128,7 +128,7 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - python-version: '3.14'  # latest
+          - python-version: '3.15'  # latest
             os: ubuntu-latest
             toxenv-factors: '-current'
           - python-version: '3.9'   # lowest
@@ -222,7 +222,8 @@ jobs:
           - macos-latest
           - windows-latest
         python-version:
-          - "3.14" # highest supported
+          - "3.15" # highest supported
+          - "3.14"
           - "3.13"
           - "3.12"
           - "3.11"
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 9954a02f..c4bc3f92 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -60,7 +60,7 @@ env:
   REPORTS_DIR: CI_reports
   DIST_DIR: dist
   DIST_ARTIFACT: python-dist
-  PYTHON_VERSION_DEFAULT: "3.14"
+  PYTHON_VERSION_DEFAULT: "3.15"
   POETRY_VERSION: "1.8.1"
 
 permissions: {}
diff --git a/pyproject.toml b/pyproject.toml
index 0d26394a..8a47898c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -58,6 +58,7 @@ classifiers = [
   "Programming Language :: Python :: 3.12",
   "Programming Language :: Python :: 3.13",
   "Programming Language :: Python :: 3.14",
+  "Programming Language :: Python :: 3.15",
   "Typing :: Typed"
 ]
 [tool.poetry.urls]
diff --git a/tox.ini b/tox.ini
index fffcf065..7ddef4ed 100644
--- a/tox.ini
+++ b/tox.ini
@@ -8,7 +8,7 @@ minversion = 4.0
 envlist =
     flake8
     mypy-{current,lowest}
-    py{314,313,312,311,310,39}
+    py{315,314,313,312,311,310,39}
     bandit
     deptry
 skip_missing_interpreters = True