diff --git a/src/calculation_budget_constrains/schema.py b/src/calculation_budget_constrains/schema.py
index a35b203..1aefe76 100644
--- a/src/calculation_budget_constrains/schema.py
+++ b/src/calculation_budget_constrains/schema.py
@@ -33,7 +33,7 @@ class OverhaulRead(OverhaulBase):
 
 
 class BudgetContraintQuery(DefultBase):
-    cost_threshold: float = 100
+    cost_threshold: float = Field(100, ge=0, le=1000000000000000)
 
 # {
 #     "overview": {
diff --git a/src/database/schema.py b/src/database/schema.py
index 42ff626..58734f9 100644
--- a/src/database/schema.py
+++ b/src/database/schema.py
@@ -7,14 +7,14 @@ from src.models import DefultBase
 class CommonParams(DefultBase):
     # This ensures no extra query params are allowed
     current_user: Optional[str] = Field(None, alias="currentUser")
-    page: int = Field(1, gt=0, lt=2147483647)
+    page: int = Field(1, gt=0, le=1000000)
     items_per_page: int = Field(5, gt=0, le=50, multiple_of=5, alias="itemsPerPage")
     query_str: Optional[str] = Field(None, alias="q")
     filter_spec: Optional[str] = Field(None, alias="filter")
     sort_by: List[str] = Field(default_factory=list, alias="sortBy[]")
     descending: List[bool] = Field(default_factory=list, alias="descending[]")
     exclude: List[str] = Field(default_factory=list, alias="exclude[]")
-    all_params: int = Field(0, alias="all")
+    all_params: int = Field(0, alias="all", ge=0, le=1000000)
 
     # Property to mirror your original return dict's bool conversion
     @property
diff --git a/src/database/service.py b/src/database/service.py
index d26f9a9..2418e8b 100644
--- a/src/database/service.py
+++ b/src/database/service.py
@@ -20,14 +20,14 @@ QueryStr = constr(pattern=r"^[ -~]+$", min_length=1)
 def common_parameters(
     db_session: DbSession,  # type: ignore
     current_user: QueryStr = Query(None, alias="currentUser"),  # type: ignore
-    page: int = Query(1, gt=0, lt=2147483647),
-    items_per_page: int = Query(5, alias="itemsPerPage", gt=-2, lt=2147483647),
+    page: int = Query(1, gt=0, le=1000000),
+    items_per_page: int = Query(5, alias="itemsPerPage", gt=-2, le=1000000),
     query_str: QueryStr = Query(None, alias="q"),  # type: ignore
     filter_spec: QueryStr = Query(None, alias="filter"),  # type: ignore
     sort_by: List[str] = Query([], alias="sortBy[]"),
     descending: List[bool] = Query([], alias="descending[]"),
     exclude: List[str] = Query([], alias="exclude[]"),
-    all: int = Query(0),
+    all: int = Query(0, ge=0, le=1000000),
     # role: QueryStr = Depends(get_current_role),
 ):
     return {
diff --git a/src/equipment_sparepart/schema.py b/src/equipment_sparepart/schema.py
index a0cde46..bc40adb 100644
--- a/src/equipment_sparepart/schema.py
+++ b/src/equipment_sparepart/schema.py
@@ -13,7 +13,7 @@ class ScopeEquipmentActivityBase(DefultBase):
 
 class ScopeEquipmentActivityCreate(ScopeEquipmentActivityBase):
     name: str
-    cost: Optional[float] = Field(0)
+    cost: Optional[float] = Field(0, ge=0, le=1000000000000000)
 
 
 class ScopeEquipmentActivityUpdate(ScopeEquipmentActivityBase):
@@ -23,7 +23,7 @@ class ScopeEquipmentActivityUpdate(ScopeEquipmentActivityBase):
 
 class ScopeEquipmentActivityRead(ScopeEquipmentActivityBase):
     name: str
-    cost: float
+    cost: float = Field(..., ge=0, le=1000000000000000)
 
 
 class ScopeEquipmentActivityPagination(Pagination):
diff --git a/src/overhaul_activity/schema.py b/src/overhaul_activity/schema.py
index 52b917b..7c872b6 100644
--- a/src/overhaul_activity/schema.py
+++ b/src/overhaul_activity/schema.py
@@ -17,14 +17,14 @@ class OverhaulActivityCreate(OverhaulActivityBase):
 
 
 class OverhaulActivityUpdate(OverhaulActivityBase):
-    material_cost: Optional[float] = Field(0)
-    service_cost: Optional[float] = Field(0)
+    material_cost: Optional[float] = Field(0, ge=0, le=1000000000000000)
+    service_cost: Optional[float] = Field(0, ge=0, le=1000000000000000)
 
 class OverhaulScope(DefultBase):
     type: str
     start_date: datetime
     end_date: datetime
-    duration_oh: int
+    duration_oh: int = Field(..., ge=0, le=1000000)
 
 
 class ScopeEquipmentJob(DefultBase):
@@ -35,12 +35,12 @@ class OverhaulJob(DefultBase):
 
 class OverhaulActivityRead(OverhaulActivityBase):
     id: UUID
-    material_cost: Optional[float] = Field(0)
-    service_cost: Optional[float] = Field(0)
+    material_cost: Optional[float] = Field(0, ge=0, le=1000000000000000)
+    service_cost: Optional[float] = Field(0, ge=0, le=1000000000000000)
     location_tag: str
     equipment_name: Optional[str]
     oh_scope: str
-    overhaul_cost: Optional[float] = Field(0)
+    overhaul_cost: Optional[float] = Field(0, ge=0, le=1000000000000000)
     # equipment: MasterEquipmentTree
     # overhaul_scope: OverhaulScope
     # overhaul_jobs: Optional[List[OverhaulJob]] = Field([])
diff --git a/src/overhaul_scope/schema.py b/src/overhaul_scope/schema.py
index af37ca3..605aa78 100644
--- a/src/overhaul_scope/schema.py
+++ b/src/overhaul_scope/schema.py
@@ -8,8 +8,8 @@ from src.models import DefultBase, Pagination
 
 
 class ScopeBase(DefultBase):
-    duration_oh: Optional[int] = Field(720, title="Duration OH")
-    crew_number: Optional[int] = Field(10, title="Crew")
+    duration_oh: Optional[int] = Field(720, title="Duration OH", ge=0, le=1000000)
+    crew_number: Optional[int] = Field(10, title="Crew", ge=0, le=1000000)
     status: Optional[str] = Field("Upcoming")