diff --git a/.github/workflows/builder.yml b/.github/workflows/builder.yml
index 80c32d47c1c7e..58d9c5a5d28b2 100644
--- a/.github/workflows/builder.yml
+++ b/.github/workflows/builder.yml
@@ -10,7 +10,7 @@ on:
 
 env:
   BUILD_TYPE: core
-  DEFAULT_PYTHON: "3.12"
+  DEFAULT_PYTHON: "3.12.3"
   PIP_TIMEOUT: 60
   UV_HTTP_TIMEOUT: 60
   UV_SYSTEM_PYTHON: "true"
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index f2ffd03f1a88f..fd4aaeed52662 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -37,8 +37,8 @@ env:
   UV_CACHE_VERSION: 1
   MYPY_CACHE_VERSION: 8
   HA_SHORT_VERSION: "2024.7"
-  DEFAULT_PYTHON: "3.12"
-  ALL_PYTHON_VERSIONS: "['3.12']"
+  DEFAULT_PYTHON: "3.12.3"
+  ALL_PYTHON_VERSIONS: "['3.12.3']"
   # 10.3 is the oldest supported version
   # - 10.3.32 is the version currently shipped with Synology (as of 17 Feb 2022)
   # 10.6 is the current long-term-support
diff --git a/.github/workflows/translations.yml b/.github/workflows/translations.yml
index f487292e79ab2..92c4c845e7d61 100644
--- a/.github/workflows/translations.yml
+++ b/.github/workflows/translations.yml
@@ -10,7 +10,7 @@ on:
       - "**strings.json"
 
 env:
-  DEFAULT_PYTHON: "3.11"
+  DEFAULT_PYTHON: "3.12.3"
 
 jobs:
   upload:
diff --git a/.github/workflows/wheels.yml b/.github/workflows/wheels.yml
index fc169619325c1..13f5177bd7e14 100644
--- a/.github/workflows/wheels.yml
+++ b/.github/workflows/wheels.yml
@@ -17,7 +17,7 @@ on:
       - "script/gen_requirements_all.py"
 
 env:
-  DEFAULT_PYTHON: "3.12"
+  DEFAULT_PYTHON: "3.12.3"
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref_name}}