diff --git a/src/build/module.ts b/src/build/module.ts
index d08f568b..f8080b25 100644
--- a/src/build/module.ts
+++ b/src/build/module.ts
@@ -26,10 +26,7 @@ import {
 export function buildQuery<T extends ObjectLiteral = ObjectLiteral>(
     input?: BuildInput<T>,
 ) : string {
-    if (
-        typeof input === 'undefined' ||
-        input === null
-    ) {
+    if (!input) {
         return '';
     }
 
diff --git a/src/build/parameter/type.ts b/src/build/parameter/type.ts
index 6068de2a..c614229e 100644
--- a/src/build/parameter/type.ts
+++ b/src/build/parameter/type.ts
@@ -29,7 +29,7 @@ export type BuildParameterInput<
             P extends `${Parameter.RELATIONS}` | `${URLParameter.RELATIONS}` ?
                 RelationsBuildInput<T> :
                 P extends `${Parameter.PAGINATION}` | `${URLParameter.PAGINATION}` ?
-                    PaginationBuildInput<T> :
+                    PaginationBuildInput :
                     P extends `${Parameter.SORT}` | `${URLParameter.SORT}` ?
                         SortBuildInput<T> :
                         never;
diff --git a/src/parameter/fields/parse.ts b/src/parameter/fields/parse.ts
index 933d153d..a5a3cd03 100644
--- a/src/parameter/fields/parse.ts
+++ b/src/parameter/fields/parse.ts
@@ -5,7 +5,7 @@
  * view the LICENSE file that was distributed with this source code.
  */
 
-import { merge } from 'smob';
+import { isObject, merge } from 'smob';
 import { ObjectLiteral } from '../../type';
 import {
     applyMapping, buildFieldWithPath, groupArrayByKeyPath, hasOwnProperty, isFieldPathAllowedByRelations,
@@ -37,7 +37,7 @@ function buildReverseRecord(
 }
 
 export function parseQueryFields<T extends ObjectLiteral = ObjectLiteral>(
-    data: unknown,
+    input: unknown,
     options?: FieldsParseOptions<T>,
 ) : FieldsParseOutput {
     options = options || {};
@@ -63,26 +63,22 @@ export function parseQueryFields<T extends ObjectLiteral = ObjectLiteral>(
         (
             typeof options.default !== 'undefined' ||
             typeof options.allowed !== 'undefined'
-        ) && keys.length === 0
+        ) &&
+        keys.length === 0
     ) {
         return [];
     }
 
-    const prototype: string = Object.prototype.toString.call(data);
-    if (
-        prototype !== '[object Object]' &&
-        prototype !== '[object Array]' &&
-        prototype !== '[object String]'
-    ) {
-        data = { [DEFAULT_ID]: [] };
-    }
-
-    if (prototype === '[object String]') {
-        data = { [DEFAULT_ID]: data };
-    }
+    let data : Record<string, any> = {
+        [DEFAULT_ID]: [],
+    };
 
-    if (prototype === '[object Array]') {
-        data = { [DEFAULT_ID]: data };
+    if (isObject(input)) {
+        data = input;
+    } else if (typeof input === 'string') {
+        data = { [DEFAULT_ID]: input };
+    } else if (Array.isArray(input)) {
+        data = { [DEFAULT_ID]: input };
     }
 
     options.mapping = options.mapping || {};
@@ -106,16 +102,13 @@ export function parseQueryFields<T extends ObjectLiteral = ObjectLiteral>(
 
         let fields : string[] = [];
 
-        if (
-            hasOwnProperty(data, path)
-        ) {
+        if (hasOwnProperty(data, path)) {
             fields = parseFieldsInput(data[path]);
         } else if (
-            hasOwnProperty(reverseMapping, path)
+            hasOwnProperty(reverseMapping, path) &&
+            hasOwnProperty(data, reverseMapping[path])
         ) {
-            if (hasOwnProperty(data, reverseMapping[path])) {
-                fields = parseFieldsInput(data[reverseMapping[path]]);
-            }
+            fields = parseFieldsInput(data[reverseMapping[path]]);
         }
 
         let transformed : FieldsInputTransformed = {
diff --git a/src/parameter/fields/utils/input.ts b/src/parameter/fields/utils/input.ts
index f75492c8..3d535d8d 100644
--- a/src/parameter/fields/utils/input.ts
+++ b/src/parameter/fields/utils/input.ts
@@ -9,8 +9,10 @@ import { FieldsInputTransformed } from '../type';
 import { FieldOperator } from '../constants';
 
 export function removeFieldInputOperator(field: string) {
-    return field.substring(0, 1) === FieldOperator.INCLUDE ||
-        field.substring(0, 1) === FieldOperator.EXCLUDE ?
+    const firstCharacter = field.substring(0, 1);
+
+    return firstCharacter === FieldOperator.INCLUDE ||
+        firstCharacter === FieldOperator.EXCLUDE ?
         field.substring(1) :
         field;
 }
@@ -27,9 +29,11 @@ export function transformFieldsInput(
     for (let i = 0; i < fields.length; i++) {
         let operator: FieldOperator | undefined;
 
-        if (fields[i].substring(0, 1) === FieldOperator.INCLUDE) {
+        const character = fields[i].substring(0, 1);
+
+        if (character === FieldOperator.INCLUDE) {
             operator = FieldOperator.INCLUDE;
-        } else if (fields[i].substring(0, 1) === FieldOperator.EXCLUDE) {
+        } else if (character === FieldOperator.EXCLUDE) {
             operator = FieldOperator.EXCLUDE;
         }
 
@@ -54,27 +58,18 @@ export function transformFieldsInput(
     return output;
 }
 
-export function parseFieldsInput(data: unknown): string[] {
-    const valuePrototype: string = Object.prototype.toString.call(data);
-    if (
-        valuePrototype !== '[object Array]' &&
-        valuePrototype !== '[object String]'
-    ) {
-        return [];
-    }
+export function parseFieldsInput(input: unknown): string[] {
+    let output: string[] = [];
 
-    let fieldsArr: string[] = [];
-
-    /* istanbul ignore next */
-    if (valuePrototype === '[object String]') {
-        fieldsArr = (data as string).split(',');
-    }
-
-    /* istanbul ignore next */
-    if (valuePrototype === '[object Array]') {
-        fieldsArr = (data as unknown[])
-            .filter((val) => typeof val === 'string') as string[];
+    if (typeof input === 'string') {
+        output = input.split(',');
+    } else if (Array.isArray(input)) {
+        for (let i = 0; i < input.length; i++) {
+            if (typeof input[i] === 'string') {
+                output.push(input[i]);
+            }
+        }
     }
 
-    return fieldsArr;
+    return output;
 }
diff --git a/src/parameter/filters/build.ts b/src/parameter/filters/build.ts
index a07a9d91..539b615e 100644
--- a/src/parameter/filters/build.ts
+++ b/src/parameter/filters/build.ts
@@ -52,7 +52,7 @@ export function buildQueryFilters<T extends ObjectLiteral = ObjectLiteral>(
     });
 }
 
-export function mergeQueryFilters<T>(
+export function mergeQueryFilters(
     target?: Record<string, any>,
     source?: Record<string, any>,
 ) : Record<string, any> {
diff --git a/src/parameter/filters/parse.ts b/src/parameter/filters/parse.ts
index 9df7e18b..9540b066 100644
--- a/src/parameter/filters/parse.ts
+++ b/src/parameter/filters/parse.ts
@@ -51,7 +51,7 @@ function transformFiltersParseOutputElement(element: FiltersParseOutputElement)
 
 function buildDefaultFiltersParseOutput<T extends ObjectLiteral = ObjectLiteral>(
     options: FiltersParseOptions<T>,
-    input?: Record<string, FiltersParseOutputElement>,
+    input: Record<string, FiltersParseOutputElement> = {},
 ) : FiltersParseOutput {
     const inputKeys = Object.keys(input || {});
 
diff --git a/src/parameter/pagination/build.ts b/src/parameter/pagination/build.ts
index 124c35e2..9c164243 100644
--- a/src/parameter/pagination/build.ts
+++ b/src/parameter/pagination/build.ts
@@ -6,12 +6,11 @@
  */
 
 import { merge } from 'smob';
-import { ObjectLiteral } from '../../type';
 import { PaginationBuildInput } from './type';
 
-export function mergeQueryPagination<T extends ObjectLiteral = ObjectLiteral>(
-    target?: PaginationBuildInput<T>,
-    source?: PaginationBuildInput<T>,
-) : PaginationBuildInput<T> {
+export function mergeQueryPagination(
+    target?: PaginationBuildInput,
+    source?: PaginationBuildInput,
+) : PaginationBuildInput {
     return merge({}, target || {}, source || {});
 }
diff --git a/src/parameter/pagination/parse.ts b/src/parameter/pagination/parse.ts
index ea035aba..d0ee56ad 100644
--- a/src/parameter/pagination/parse.ts
+++ b/src/parameter/pagination/parse.ts
@@ -5,6 +5,7 @@
  * view the LICENSE file that was distributed with this source code.
  */
 
+import { isObject } from 'smob';
 import { PaginationParseOptions, PaginationParseOutput } from './type';
 
 // --------------------------------------------------
@@ -46,8 +47,7 @@ export function parseQueryPagination(
 
     const pagination : PaginationParseOutput = {};
 
-    const prototype: string = Object.prototype.toString.call(data);
-    if (prototype !== '[object Object]') {
+    if (!isObject(data)) {
         return finalizePagination(pagination, options);
     }
 
diff --git a/src/parameter/pagination/type.ts b/src/parameter/pagination/type.ts
index ad8370b8..2d232133 100644
--- a/src/parameter/pagination/type.ts
+++ b/src/parameter/pagination/type.ts
@@ -9,7 +9,7 @@
 // Build
 // -----------------------------------------------------------
 
-export type PaginationBuildInput<T> = {
+export type PaginationBuildInput = {
     limit?: number,
     offset?: number
 };
diff --git a/src/parameter/relations/build.ts b/src/parameter/relations/build.ts
index d3091dd7..a5878797 100644
--- a/src/parameter/relations/build.ts
+++ b/src/parameter/relations/build.ts
@@ -14,7 +14,7 @@ export function buildQueryRelations<T extends ObjectLiteral = ObjectLiteral>(
     input?: RelationsBuildInput<T>,
 ) : string[] {
     if (typeof input === 'undefined') {
-        return input;
+        return [];
     }
 
     return flattenToKeyPathArray(input);
diff --git a/src/parameter/relations/parse.ts b/src/parameter/relations/parse.ts
index 173d7ca3..c6201b9a 100644
--- a/src/parameter/relations/parse.ts
+++ b/src/parameter/relations/parse.ts
@@ -15,8 +15,8 @@ import { includeParents, isValidRelationPath } from './utils';
 // --------------------------------------------------
 
 export function parseQueryRelations<T extends ObjectLiteral = ObjectLiteral>(
-    data: unknown,
-    options?: RelationsParseOptions<T>,
+    input: unknown,
+    options: RelationsParseOptions<T> = {},
 ): RelationsParseOutput {
     options = options || {};
 
@@ -36,20 +36,14 @@ export function parseQueryRelations<T extends ObjectLiteral = ObjectLiteral>(
 
     let items: string[] = [];
 
-    const prototype: string = Object.prototype.toString.call(data);
-    if (
-        prototype !== '[object Array]' &&
-        prototype !== '[object String]'
-    ) {
-        return [];
-    }
-
-    if (prototype === '[object String]') {
-        items = (data as string).split(',');
-    }
-
-    if (prototype === '[object Array]') {
-        items = (data as any[]).filter((el) => typeof el === 'string');
+    if (typeof input === 'string') {
+        items = input.split(',');
+    } else if (Array.isArray(input)) {
+        for (let i = 0; i < input.length; i++) {
+            if (typeof input[i] === 'string') {
+                items.push(input[i]);
+            }
+        }
     }
 
     if (items.length === 0) {
@@ -64,7 +58,7 @@ export function parseQueryRelations<T extends ObjectLiteral = ObjectLiteral>(
     }
 
     if (options.allowed) {
-        items = items.filter((item) => isPathCoveredByParseAllowedOption(options.allowed, item));
+        items = items.filter((item) => isPathCoveredByParseAllowedOption(options.allowed as string[], item));
     } else {
         items = items.filter((item) => isValidRelationPath(item));
     }
@@ -94,7 +88,7 @@ export function parseQueryRelations<T extends ObjectLiteral = ObjectLiteral>(
             ) {
                 value = options.pathMapping[key];
             } else {
-                value = parts.pop();
+                value = parts.pop() as string;
             }
 
             return {
diff --git a/src/parameter/sort/parse.ts b/src/parameter/sort/parse.ts
index d4c1b53d..2bc77510 100644
--- a/src/parameter/sort/parse.ts
+++ b/src/parameter/sort/parse.ts
@@ -5,6 +5,7 @@
  * view the LICENSE file that was distributed with this source code.
  */
 
+import { isObject } from 'smob';
 import { ObjectLiteral } from '../../type';
 import {
     applyMapping,
@@ -87,13 +88,11 @@ export function parseQuerySort<T extends ObjectLiteral = ObjectLiteral>(
 
     options.mapping = options.mapping || {};
 
-    const prototype = Object.prototype.toString.call(data);
-
     /* istanbul ignore next */
     if (
-        prototype !== '[object String]' &&
-        prototype !== '[object Array]' &&
-        prototype !== '[object Object]'
+        typeof data !== 'string' &&
+        !Array.isArray(data) &&
+        !isObject(data)
     ) {
         return buildDefaultSortParseOutput(options);
     }
@@ -198,7 +197,7 @@ export function parseQuerySort<T extends ObjectLiteral = ObjectLiteral>(
         for (let i = 0; i < options.allowed.length; i++) {
             const temp : SortParseOutput = [];
 
-            const keyPaths = flattenParseAllowedOption(options.allowed[i]);
+            const keyPaths = flattenParseAllowedOption(options.allowed[i] as string[]);
 
             for (let j = 0; j < keyPaths.length; j++) {
                 let keyWithAlias : string = keyPaths[j];
@@ -206,7 +205,7 @@ export function parseQuerySort<T extends ObjectLiteral = ObjectLiteral>(
 
                 const parts = keyWithAlias.split('.');
                 if (parts.length > 1) {
-                    key = parts.pop();
+                    key = parts.pop() as string;
                 } else {
                     key = keyWithAlias;
 
diff --git a/src/parameter/utils/parse/allowed-option.ts b/src/parameter/utils/parse/allowed-option.ts
index 4a4c9634..69692fc6 100644
--- a/src/parameter/utils/parse/allowed-option.ts
+++ b/src/parameter/utils/parse/allowed-option.ts
@@ -5,17 +5,21 @@
  * view the LICENSE file that was distributed with this source code.
  */
 
-import { NestedKeys, NestedResourceKeys } from '../../../type';
+import { NestedKeys, NestedResourceKeys, ObjectLiteral } from '../../../type';
 import { flattenToKeyPathArray } from '../../../utils';
 import { ParseAllowedOption } from '../../type';
 
-export function flattenParseAllowedOption<T>(
-    input: ParseAllowedOption<T>,
+export function flattenParseAllowedOption<T extends ObjectLiteral>(
+    input?: ParseAllowedOption<T>,
 ) : string[] {
+    if (typeof input === 'undefined') {
+        return [];
+    }
+
     return flattenToKeyPathArray(input);
 }
 
-export function isPathCoveredByParseAllowedOption<T>(
+export function isPathCoveredByParseAllowedOption<T extends ObjectLiteral>(
     input: ParseAllowedOption<T> |
     NestedKeys<T>[] |
     NestedResourceKeys<T>[],
diff --git a/src/parse/module.ts b/src/parse/module.ts
index 7ea294cb..e72bbb32 100644
--- a/src/parse/module.ts
+++ b/src/parse/module.ts
@@ -19,7 +19,7 @@ import { ParseInput, ParseOptions, ParseOutput } from './type';
 
 export function parseQuery<T extends ObjectLiteral = ObjectLiteral>(
     input: ParseInput,
-    options?: ParseOptions<T>,
+    options: ParseOptions<T> = {},
 ) : ParseOutput {
     options = options || {};
 
@@ -30,7 +30,7 @@ export function parseQuery<T extends ObjectLiteral = ObjectLiteral>(
             }
         }
 
-        return data;
+        return data || {} as T;
     };
 
     const output : ParseOutput = {};
diff --git a/src/parse/parameter/module.ts b/src/parse/parameter/module.ts
index 1b6dd479..6c6e38b7 100644
--- a/src/parse/parameter/module.ts
+++ b/src/parse/parameter/module.ts
@@ -74,6 +74,6 @@ function invalidToEmptyObject<V>(
 ): NonNullable<V> {
     return typeof value === 'boolean' ||
         typeof value === 'undefined' ?
-        {} as V :
-        value;
+        {} as NonNullable<V> :
+        value as NonNullable<V>;
 }
diff --git a/src/parse/parameter/utils.ts b/src/parse/parameter/utils.ts
index a3216b9b..9fe07773 100644
--- a/src/parse/parameter/utils.ts
+++ b/src/parse/parameter/utils.ts
@@ -5,14 +5,16 @@
  * view the LICENSE file that was distributed with this source code.
  */
 
+import { isObject } from 'smob';
+
 export function buildQueryParameterOptions<T extends Record<string, any>>(
     input?: T | boolean,
 ) : T {
-    if (typeof input === 'boolean') {
-        return {} as T;
+    if (isObject(input)) {
+        return input;
     }
 
-    return input;
+    return {} as T;
 }
 
 export function isQueryParameterEnabled<T extends Record<string, any>>(
diff --git a/src/utils/array.ts b/src/utils/array.ts
index a3b6d2df..6d191db9 100644
--- a/src/utils/array.ts
+++ b/src/utils/array.ts
@@ -122,7 +122,7 @@ export function groupArrayByKeyPath(input: string[]): Record<string, string[]> {
             key = DEFAULT_ID;
             name = input[i];
         } else {
-            name = parts.pop();
+            name = parts.pop() as string;
             key = parts.join('.');
         }
 
diff --git a/src/utils/field.ts b/src/utils/field.ts
index 0fdd22ed..631927d9 100644
--- a/src/utils/field.ts
+++ b/src/utils/field.ts
@@ -11,7 +11,7 @@ export function getFieldDetails(field: string) : FieldDetails {
     const parts : string[] = field.split('.');
 
     return {
-        name: parts.pop(),
+        name: parts.pop() as string,
         path: parts.length > 0 ? parts.join('.') : undefined,
     };
 }
diff --git a/src/utils/mapping.ts b/src/utils/mapping.ts
index 71ae9e53..ab2f1391 100644
--- a/src/utils/mapping.ts
+++ b/src/utils/mapping.ts
@@ -57,7 +57,11 @@ export function applyMapping(
     }
 
     if (onlyKey) {
-        return output.pop();
+        return output.pop() || name;
+    }
+
+    if (output.length === 0) {
+        return name;
     }
 
     return output.join('.');
diff --git a/tsconfig.json b/tsconfig.json
index b2a5626d..074512fe 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,28 +1,12 @@
 {
+    "extends": "@tada5hi/tsconfig",
     "compilerOptions": {
-        "strict": true,
-        "skipLibCheck": true,
-        "esModuleInterop": true,
-        "declaration": true,
-        "declarationDir": "dist",
-        "experimentalDecorators": true,
-        "emitDecoratorMetadata": true,
-        "lib": [
-            "ESNext"
-        ],
-        "module": "ESNext",
-        "moduleResolution": "Node",
-        "newLine": "LF",
-        "noFallthroughCasesInSwitch": true,
-        "noImplicitAny": true,
-        "noImplicitReturns": true,
-        "noImplicitThis": false,
-        "noUnusedParameters": false,
-        "noUnusedLocals": true,
         "outDir": "dist",
-        "sourceMap": true,
-        "strictNullChecks": false,
-        "target": "ESNext"
+        "declarationMap": true,
+
+        "lib": ["ESNext"],
+        "module": "ESNext",
+        "target": "ES2020"
     },
     "include": [
         "src/**/*.ts"