diff --git a/api/routes_admin.py b/api/routes_admin.py
index 419658a..b70e8eb 100644
--- a/api/routes_admin.py
+++ b/api/routes_admin.py
@@ -623,15 +623,16 @@ class AdminPresencePatternCreateRequest(BaseModel):
     covers that week (Monday=0); every week of the cycle must be
     covered, which the PRESENCE MODEL enforces at construction, not
     this shape — as it does the non-blank ``name`` and the
-    ``home``/``away`` ``kind``.  ``cycle_length_weeks`` is a strict
-    JSON integer: ``2.0`` or ``"2"`` is a 422, not a silent coercion.
+    ``home``/``away`` ``kind``.  ``cycle_length_weeks`` and the weekday
+    values are strict JSON integers: ``2.0``, ``"2"`` or ``true`` is a
+    422, not a silent coercion.
     """
 
     name: str
     kind: str
     cycle_length_weeks: StrictInt
     anchor_date: str
-    pattern: dict[int, list[int]]
+    pattern: dict[int, list[StrictInt]]
 
 
 class AdminPresencePatternEditRequest(BaseModel):
@@ -646,7 +647,7 @@ class AdminPresencePatternEditRequest(BaseModel):
     kind: str | None = None
     cycle_length_weeks: StrictInt | None = None
     anchor_date: str | None = None
-    pattern: dict[int, list[int]] | None = None
+    pattern: dict[int, list[StrictInt]] | None = None
 
 
 class AdminPresencePatternResponse(BaseModel):
diff --git a/tests/test_api_admin_presence.py b/tests/test_api_admin_presence.py
index 84f7b95..5ce5590 100644
--- a/tests/test_api_admin_presence.py
+++ b/tests/test_api_admin_presence.py
@@ -690,6 +690,12 @@ async def test_pattern_patch_unknown_id_is_404(
         ({"anchor_date": None}, "anchor_date"),
         ({"pattern": {}}, "pattern"),
         ({"pattern": None}, "pattern"),
+        ({"pattern": {"0": [7]}}, "pattern"),  # weekday out of 0..6
+        # Strict JSON integer weekdays: no bool, string or float coercion.
+        ({"pattern": {"0": [True]}}, "pattern"),
+        ({"pattern": {"0": [False]}}, "pattern"),
+        ({"pattern": {"0": ["1"]}}, "pattern"),
+        ({"pattern": {"0": [1.0]}}, "pattern"),
     ],
 )
 async def test_rejected_pattern_patch_is_422_and_changes_nothing(
@@ -882,6 +888,11 @@ async def test_pattern_and_override_for_unknown_child_are_404(
         (_pattern_body(anchor_date="2026-13-40"), "anchor_date"),
         (_pattern_body(anchor_date="05/01/2026"), "anchor_date"),
         (_pattern_body(pattern={"0": [7]}), "pattern"),  # weekday out of 0..6
+        # Strict JSON integer weekdays: no bool, string or float coercion.
+        (_pattern_body(pattern={"0": [True]}), "pattern"),
+        (_pattern_body(pattern={"0": [False]}), "pattern"),
+        (_pattern_body(pattern={"0": ["1"]}), "pattern"),
+        (_pattern_body(pattern={"0": [1.0]}), "pattern"),
         (_pattern_body(pattern={"nope": [0]}), "pattern"),  # non-int week
         (_pattern_body(pattern={"0": "0,2,4"}), "pattern"),  # not a list
         (_pattern_body(kind="sometimes"), "kind"),