diff --git a/packages/server/src/config/data.ts b/packages/server/src/config/data.ts
index 8460f500..8d010f66 100644
--- a/packages/server/src/config/data.ts
+++ b/packages/server/src/config/data.ts
@@ -27,7 +27,7 @@ function toLockerSubsectionData(subsection: LockerSubsection): LockerSubsectionD
 function fromLockerSectionData(data: LockerSectionData): LockerSection {
 	return {
 		subsections: data.s.L.map((subsectionData) => fromLockerSubsectionData(subsectionData.M)),
-		disabled: data.d.L.map((disabled) => disabled.S),
+		disabled: data.d.NS.map((disabled) => parseInt(disabled)),
 		height: parseInt(data.h?.N ?? '0')
 	};
 }
@@ -35,7 +35,7 @@ function fromLockerSectionData(data: LockerSectionData): LockerSection {
 function toLockerSectionData(section: LockerSection): LockerSectionData {
 	return {
 		s: { L: section.subsections.map((ss) => ({ M: toLockerSubsectionData(ss) })) },
-		d: { L: section.disabled.map((d) => ({ S: d })) },
+		d: { NS: section.disabled.map((d) => `${d}`) },
 		h: { N: `${section.height}` }
 	};
 }
diff --git a/packages/server/src/util/locker.ts b/packages/server/src/util/locker.ts
index 63b232a4..1a103840 100644
--- a/packages/server/src/util/locker.ts
+++ b/packages/server/src/util/locker.ts
@@ -1,37 +1,33 @@
-export function isValidLocker(
-	config: ServiceConfig,
-	lockerId: string,
-	department: string
-) {
+export function isValidLocker(config: ServiceConfig, lockerId: string, department: string) {
 	const buildings = config.buildings;
 	const parsedLockerId = lockerId.split('-');
 	const buildingNum = parsedLockerId[0];
 	const lockerFloor = parsedLockerId[1];
 	const lockerSection = parsedLockerId[2].substr(0, 1);
 	const lockerSectionNum = parseInt(parsedLockerId[2].substr(1));
-	const selectedSections = buildings[buildingNum]?.lockers[lockerFloor]?.[lockerSection]?.subsections;
+	const selectedSection = buildings[buildingNum]?.lockers[lockerFloor]?.[lockerSection];
+	const selectedSubsections = selectedSection?.subsections;
 	if (parsedLockerId.length !== 3) return false;
-	if (!selectedSections) return false;
-	const section = selectedSections.find(
+	if (!selectedSubsections) return false;
+	const section = selectedSubsections.find(
 		(sect) =>
 			sect.range[0] <= lockerSectionNum &&
 			sect.range[1] >= lockerSectionNum &&
+			!selectedSection.disabled.includes(lockerSectionNum) &&
 			(department === undefined || department === sect.department)
 	);
 	return section !== undefined;
 }
 
-export function getLockerDepartment(
-	config: ServiceConfig,
-	lockerId: string
-) {
+export function getLockerDepartment(config: ServiceConfig, lockerId: string) {
 	const buildings = config.buildings;
 	const parsedLockerId = lockerId.split('-');
 	const buildingNum = parsedLockerId[0];
 	const lockerFloor = parsedLockerId[1];
 	const lockerSection = parsedLockerId[2].substr(0, 1);
 	const lockerSectionNum = parseInt(parsedLockerId[2].substr(1));
-	const selectedSections = buildings[buildingNum]?.lockers[lockerFloor]?.[lockerSection]?.subsections;
+	const selectedSections =
+		buildings[buildingNum]?.lockers[lockerFloor]?.[lockerSection]?.subsections;
 	if (parsedLockerId.length !== 3) throw new Error('Given locker is not valid');
 	if (!selectedSections) Error('Given locker is not valid');
 	const section = selectedSections.find(
@@ -39,4 +35,4 @@ export function getLockerDepartment(
 	);
 	if (section) return section.department;
 	else throw new Error('Given locker is not valid');
-}
\ No newline at end of file
+}
diff --git a/packages/types/index.d.ts b/packages/types/index.d.ts
index b67f72e2..acda95c7 100644
--- a/packages/types/index.d.ts
+++ b/packages/types/index.d.ts
@@ -106,13 +106,13 @@ type BuildingData = {
 
 type LockerSection = {
 	subsections: LockerSubsection[];
-	disabled: string[];
+	disabled: number[];
 	height: number;
 };
 
 type LockerSectionData = {
 	s: { L: { M: LockerSubsectionData }[] };
-	d: { L: { S: string }[] };
+	d: { NS: string[] };
 	h: { N: string };
 };