diff --git a/transformers/PartyTransformer.tsx b/transformers/PartyTransformer.tsx
index 3e63b0a7..30a03408 100644
--- a/transformers/PartyTransformer.tsx
+++ b/transformers/PartyTransformer.tsx
@@ -40,7 +40,7 @@ export function toObject(data: any): Party {
     },
     raid: Raid.toObject(data.raid),
     guidebooks: data.guidebooks,
-  } as Party
+  }
 }
 
 // Transforms Party object into API parameters
diff --git a/transformers/RaidGroupTransformer.tsx b/transformers/RaidGroupTransformer.tsx
index 09cb553b..7695a491 100644
--- a/transformers/RaidGroupTransformer.tsx
+++ b/transformers/RaidGroupTransformer.tsx
@@ -1,7 +1,7 @@
 import * as Raid from './RaidTransformer'
 
 // Transforms API response to RaidGroup object
-export function toObject(data: any) {
+export function toObject(data: any): RaidGroup {
   return {
     id: data.id,
     name: {
@@ -15,5 +15,5 @@ export function toObject(data: any) {
     extra: data.extra,
     guidebooks: data.guidebooks,
     hl: data.hl,
-  } as RaidGroup
+  }
 }
diff --git a/transformers/RaidTransformer.tsx b/transformers/RaidTransformer.tsx
index b3f02886..68021aec 100644
--- a/transformers/RaidTransformer.tsx
+++ b/transformers/RaidTransformer.tsx
@@ -2,7 +2,7 @@ import * as Element from './ElementTransformer'
 import * as RaidGroup from './RaidGroupTransformer'
 
 // Transforms API response to Raid object
-export function toObject(data: any) {
+export function toObject(data: any): Raid {
   return {
     id: data.id,
     group: RaidGroup.toObject(data.group),
@@ -13,5 +13,5 @@ export function toObject(data: any) {
     element: Element.toObject(data.element),
     level: data.level,
     slug: data.slug,
-  } as Raid
+  }
 }
diff --git a/transformers/UserTransformer.tsx b/transformers/UserTransformer.tsx
index 225b1aa1..077272a4 100644
--- a/transformers/UserTransformer.tsx
+++ b/transformers/UserTransformer.tsx
@@ -10,7 +10,7 @@ export function toObject(data: any): User {
     gender: data.gender,
     language: data.language,
     theme: data.theme,
-  } as User
+  }
 }
 
 // Transforms User object into API parameters