diff --git a/.changeset/chatty-bulldogs-dream.md b/.changeset/chatty-bulldogs-dream.md
new file mode 100644
index 00000000000..39837912d86
--- /dev/null
+++ b/.changeset/chatty-bulldogs-dream.md
@@ -0,0 +1,6 @@
+---
+'@keystone-ui/core': patch
+'@keystone-next/types': patch
+---
+
+Fixed TypeScript errors in declarations
diff --git a/design-system/packages/core/package.json b/design-system/packages/core/package.json
index 0de101afa03..a9af2306d5f 100644
--- a/design-system/packages/core/package.json
+++ b/design-system/packages/core/package.json
@@ -5,7 +5,6 @@
   "main": "dist/core.cjs.js",
   "module": "dist/core.esm.js",
   "devDependencies": {
-    "@types/facepaint": "^1.2.1",
     "@types/react": "^17.0.11",
     "react": "^17.0.2",
     "react-dom": "^17.0.2"
@@ -17,6 +16,7 @@
   "dependencies": {
     "@babel/runtime": "^7.14.6",
     "@emotion/react": "^11.4.0",
+    "@types/facepaint": "^1.2.1",
     "facepaint": "^1.2.1"
   },
   "engines": {
diff --git a/packages-next/types/src/legacy-filters.ts b/packages-next/types/src/legacy-filters.ts
index 3cdd73840c0..7706f5f2d1e 100644
--- a/packages-next/types/src/legacy-filters.ts
+++ b/packages-next/types/src/legacy-filters.ts
@@ -3,7 +3,7 @@ import { schema } from '.';
 const identity = (x: any) => x;
 
 export const impls = {
-  equalityConditions<T>(fieldKey: string, f: (a: any) => any = identity) {
+  equalityConditions<T>(fieldKey: string, f: (a: any) => any = identity): any {
     return {
       [fieldKey]: (value: T) => ({ [fieldKey]: { equals: f(value) } }),
       [`${fieldKey}_not`]: (value: T | null) =>
@@ -14,7 +14,7 @@ export const impls = {
             },
     };
   },
-  equalityConditionsInsensitive(fieldKey: string, f: (a: any) => any = identity) {
+  equalityConditionsInsensitive(fieldKey: string, f: (a: any) => any = identity): any {
     return {
       [`${fieldKey}_i`]: (value: string) => ({
         [fieldKey]: { equals: f(value), mode: 'insensitive' },
@@ -31,7 +31,7 @@ export const impls = {
     };
   },
 
-  inConditions<T>(fieldKey: string, f: (a: any) => any = identity) {
+  inConditions<T>(fieldKey: string, f: (a: any) => any = identity): any {
     return {
       [`${fieldKey}_in`]: (value: (T | null)[]) =>
         (value.includes(null)
@@ -56,7 +56,7 @@ export const impls = {
     };
   },
 
-  orderingConditions<T>(fieldKey: string, f: (a: any) => any = identity) {
+  orderingConditions<T>(fieldKey: string, f: (a: any) => any = identity): any {
     return {
       [`${fieldKey}_lt`]: (value: T) => ({ [fieldKey]: { lt: f(value) } }),
       [`${fieldKey}_lte`]: (value: T) => ({ [fieldKey]: { lte: f(value) } }),
@@ -65,7 +65,7 @@ export const impls = {
     };
   },
 
-  containsConditions(fieldKey: string, f: (a: any) => any = identity) {
+  containsConditions(fieldKey: string, f: (a: any) => any = identity): any {
     return {
       [`${fieldKey}_contains`]: (value: string) => ({ [fieldKey]: { contains: f(value) } }),
       [`${fieldKey}_not_contains`]: (value: string) => ({
@@ -74,7 +74,7 @@ export const impls = {
     };
   },
 
-  stringConditions(fieldKey: string, f: (a: any) => any = identity) {
+  stringConditions(fieldKey: string, f: (a: any) => any = identity): any {
     return {
       ...impls.containsConditions(fieldKey, f),
       [`${fieldKey}_starts_with`]: (value: string) => ({ [fieldKey]: { startsWith: f(value) } }),
@@ -88,7 +88,7 @@ export const impls = {
     };
   },
 
-  stringConditionsInsensitive(fieldKey: string, f: (a: any) => any = identity) {
+  stringConditionsInsensitive(fieldKey: string, f: (a: any) => any = identity): any {
     return {
       [`${fieldKey}_contains_i`]: (value: string) => ({
         [fieldKey]: { contains: f(value), mode: 'insensitive' },