diff --git a/src/controllers/api/arcaneCommonController.ts b/src/controllers/api/arcaneCommonController.ts
index 70dae1ac..67102746 100644
--- a/src/controllers/api/arcaneCommonController.ts
+++ b/src/controllers/api/arcaneCommonController.ts
@@ -19,7 +19,7 @@ export const arcaneCommonController: RequestHandler = async (req, res) => {
         inventory.Upgrades.pull({ _id: json.arcane.ItemId.$oid });
 
         // Add RawUpgrades
-        const numRawUpgradesToGive = arcaneLevelCounts[JSON.parse(upgrade.UpgradeFingerprint).lvl];
+        const numRawUpgradesToGive = arcaneLevelCounts[(JSON.parse(upgrade.UpgradeFingerprint) as { lvl: number }).lvl];
         addMods(inventory, [
             {
                 ItemType: json.arcane.ItemType,
@@ -35,7 +35,7 @@ export const arcaneCommonController: RequestHandler = async (req, res) => {
         if (upgrade) {
             // Have an existing Upgrade item?
             if (upgrade.UpgradeFingerprint) {
-                const existingLevel = JSON.parse(upgrade.UpgradeFingerprint).lvl;
+                const existingLevel = (JSON.parse(upgrade.UpgradeFingerprint) as { lvl: number }).lvl;
                 numConsumed -= arcaneLevelCounts[existingLevel];
             }
             upgrade.UpgradeFingerprint = JSON.stringify({ lvl: json.newRank });
diff --git a/src/services/inventoryService.ts b/src/services/inventoryService.ts
index 9d51f597..ac02b28e 100644
--- a/src/services/inventoryService.ts
+++ b/src/services/inventoryService.ts
@@ -906,8 +906,7 @@ export const upgradeMod = async (artifactsData: IArtifactsRequest, accountId: st
         const { ItemType, UpgradeFingerprint, ItemId } = Upgrade;
 
         const safeUpgradeFingerprint = UpgradeFingerprint || '{"lvl":0}';
-        // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
-        const parsedUpgradeFingerprint = JSON.parse(safeUpgradeFingerprint);
+        const parsedUpgradeFingerprint = JSON.parse(safeUpgradeFingerprint) as { lvl: number };
         parsedUpgradeFingerprint.lvl += LevelDiff;
         const stringifiedUpgradeFingerprint = JSON.stringify(parsedUpgradeFingerprint);