diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7060242..b845e1d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -43,7 +43,7 @@ jobs:
 
       # ── Python setup ──────────────────────────────────────────────────────────
       - name: Set up Python
-        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5
+        uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1  # v6.3.0
         with:
           python-version: "3.12"
           cache: "pip"
@@ -89,7 +89,7 @@ jobs:
         with:
           enable-cache: true
       - name: Set up Python 3.12
-        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5
+        uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1  # v6.3.0
         with:
           python-version: "3.12"
       - name: Install dependencies
@@ -143,7 +143,7 @@ jobs:
         uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5
+        uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1  # v6.3.0
         with:
           python-version: ${{ matrix.python-version }}
           cache: "pip"
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 5b71110..e018cbc 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -89,7 +89,7 @@ jobs:
 
       # ── Check (a): version consistency ─────────────────────────────────────
       - name: Set up Python (for validation scripts)
-        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5
+        uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1  # v6.3.0
         with:
           python-version: "3.12"
 
@@ -136,7 +136,7 @@ jobs:
         uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4
 
       - name: Set up Python
-        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5
+        uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1  # v6.3.0
         with:
           python-version: "3.12"
           cache: "pip"
@@ -281,7 +281,7 @@ jobs:
     steps:
       - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4
 
-      - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5
+      - uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1  # v6.3.0
         with:
           python-version: "3.11"
 
@@ -343,7 +343,7 @@ jobs:
           fetch-depth: 0
 
       - name: Set up Python
-        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5
+        uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1  # v6.3.0
         with:
           python-version: "3.12"
 
@@ -467,7 +467,7 @@ jobs:
           name: build-artifacts
           path: dist/
 
-      - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5
+      - uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1  # v6.3.0
         with:
           python-version: "3.12"
 
@@ -494,7 +494,7 @@ jobs:
     steps:
       - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4
 
-      - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5
+      - uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1  # v6.3.0
         with:
           python-version: "3.12"
 
@@ -592,7 +592,7 @@ jobs:
           fetch-depth: 0
 
       - name: Set up Python
-        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5
+        uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1  # v6.3.0
         with:
           python-version: "3.12"