diff --git a/js/util/validation.js b/js/util/validation.js
index 9f8f7a9..e2e07bc 100644
--- a/js/util/validation.js
+++ b/js/util/validation.js
@@ -64,6 +64,26 @@ export const isIn = function(valueC, message = "Value must be one of: %{1}") {
     return validation;
 };
 
+export const isUpper = function(message = "Value contains lower cased characters") {
+    const validation = (value, ctx) => {
+        if (value === null) return true;
+        if (value === "") return true;
+        if (value === value.toUpperCase()) return true;
+        throw new ValidationError(message);
+    };
+    return validation;
+};
+
+export const isLower = function(message = "Value contains upper cased characters") {
+    const validation = (value, ctx) => {
+        if (value === null) return true;
+        if (value === "") return true;
+        if (value === value.toLowerCase()) return true;
+        throw new ValidationError(message);
+    };
+    return validation;
+};
+
 export const isSimple = function(message = "Value contains invalid characters") {
     const validation = (value, ctx) => {
         if (value === null) return true;
@@ -103,3 +123,30 @@ export const isRegex = function(regex, message = "Value has incorrect format") {
     };
     return validation;
 };
+
+export const stringGt = function(valueC, message = "Must be larger than %{1} characters") {
+    const validation = (value, ctx) => {
+        if (value === null) return true;
+        if (value.length > valueC) return true;
+        throw new ValidationError(message.replace("%{1}", String(valueC)));
+    };
+    return validation;
+};
+
+export const stringLt = function(valueC, message = "Must be smaller than %{1} characters") {
+    const validation = (value, ctx) => {
+        if (value === null) return true;
+        if (value.length < valueC) return true;
+        throw new ValidationError(message.replace("%{1}", String(valueC)));
+    };
+    return validation;
+};
+
+export const stringEq = function(valueC, message = "Must be exactly %{1} characters") {
+    const validation = (value, ctx) => {
+        if (value === null) return true;
+        if (value.length === valueC) return true;
+        throw new ValidationError(message.replace("%{1}", String(valueC)));
+    };
+    return validation;
+};
diff --git a/test/util/validation.js b/test/util/validation.js
index 5169cfa..9a40498 100644
--- a/test/util/validation.js
+++ b/test/util/validation.js
@@ -124,6 +124,54 @@ describe("#isIn()", function() {
     });
 });
 
+describe("#isUpper()", function() {
+    it("should verify basic is simple conditions", () => {
+        let result;
+
+        result = yonius.isUpper()("HELLO");
+        assert.strictEqual(result, true);
+
+        result = yonius.isUpper()("HELLO.WORLD");
+        assert.strictEqual(result, true);
+
+        result = yonius.isUpper()(null);
+        assert.strictEqual(result, true);
+
+        assert.throws(
+            () => yonius.isUpper()("illegal!"),
+            err => {
+                assert.strictEqual(err instanceof yonius.ValidationError, true);
+                assert.strictEqual(err.message, "Value contains lower cased characters");
+                return true;
+            }
+        );
+    });
+});
+
+describe("#isLower()", function() {
+    it("should verify basic is simple conditions", () => {
+        let result;
+
+        result = yonius.isLower()("hello");
+        assert.strictEqual(result, true);
+
+        result = yonius.isLower()("hello.hello");
+        assert.strictEqual(result, true);
+
+        result = yonius.isLower()(null);
+        assert.strictEqual(result, true);
+
+        assert.throws(
+            () => yonius.isLower()("ILLEGAL!"),
+            err => {
+                assert.strictEqual(err instanceof yonius.ValidationError, true);
+                assert.strictEqual(err.message, "Value contains upper cased characters");
+                return true;
+            }
+        );
+    });
+});
+
 describe("#isSimple()", function() {
     it("should verify basic is simple conditions", () => {
         let result;
@@ -213,3 +261,72 @@ describe("#isRegex()", function() {
         );
     });
 });
+
+describe("#stringGt()", function() {
+    it("should verify basic greater than operations", () => {
+        let result;
+
+        result = yonius.stringGt(2)("hel");
+        assert.strictEqual(result, true);
+
+        result = yonius.stringGt(4)("hello");
+        assert.strictEqual(result, true);
+
+        result = yonius.stringGt(4)(null);
+        assert.strictEqual(result, true);
+
+        assert.throws(
+            () => yonius.stringGt(4)("hell"),
+            err => {
+                assert.strictEqual(err instanceof yonius.ValidationError, true);
+                assert.strictEqual(err.message, "Must be larger than 4 characters");
+                return true;
+            }
+        );
+    });
+});
+
+describe("#stringLt()", function() {
+    it("should verify basic greater than operations", () => {
+        let result;
+
+        result = yonius.stringLt(2)("h");
+        assert.strictEqual(result, true);
+
+        result = yonius.stringLt(4)("hel");
+        assert.strictEqual(result, true);
+
+        result = yonius.stringLt(4)(null);
+        assert.strictEqual(result, true);
+
+        assert.throws(
+            () => yonius.stringLt(4)("hell"),
+            err => {
+                assert.strictEqual(err instanceof yonius.ValidationError, true);
+                assert.strictEqual(err.message, "Must be smaller than 4 characters");
+                return true;
+            }
+        );
+    });
+});
+
+describe("#stringEq()", function() {
+    it("should verify basic greater than operations", () => {
+        let result;
+
+        result = yonius.stringEq(2)("he");
+        assert.strictEqual(result, true);
+
+        result = yonius.stringEq(4)(null);
+        assert.strictEqual(result, true);
+
+        assert.throws(
+            () => yonius.stringEq(4)("hel"),
+            err => {
+                assert.strictEqual(err instanceof yonius.ValidationError, true);
+                assert.strictEqual(err.message, "Must be exactly 4 characters");
+                return true;
+            }
+        );
+    });
+});
diff --git a/types/base/main.d.ts b/types/base/main.d.ts
index 5f1d95f..fb628e5 100644
--- a/types/base/main.d.ts
+++ b/types/base/main.d.ts
@@ -1,3 +1,3 @@
-export declare function register(name: string, value: any): void;
+export declare function register(name: string, value: unknown): void;
 export declare function unregister(name: string): void;
-export declare function request(name: string): any;
+export declare function request(name: string): unknown;
diff --git a/types/data/model.d.ts b/types/data/model.d.ts
index 631d3b8..2ff0ebb 100644
--- a/types/data/model.d.ts
+++ b/types/data/model.d.ts
@@ -1,16 +1,16 @@
 export declare class Model {
     static niw<T = Model>(this: { new(): T }): T
-    static find<T = Model>(this: { new(): T }, params?: Record<string, any>): T[]
-    static get<T = Model>(this: { new(): T }, params?: Record<string, any>): T
+    static find<T = Model>(this: { new(): T }, params?: Record<string, unknown>): T[]
+    static get<T = Model>(this: { new(): T }, params?: Record<string, unknown>): T
 
     constructor(options?: { fill?: boolean })
-    apply<T = Model>(this: T, model: Record<string, any>): Promise<T>
+    apply<T = Model>(this: T, model: Record<string, unknown>): Promise<T>
     save<T = Model>(this: T): Promise<T>
     delete<T = Model>(this: T, options?: {
         preDelete?: boolean,
         postDelete?: boolean,
-        beforeCallbacks?: ((self: T, model: Record<string, any>) => void)[],
-        afterCallbacks?: ((self: T, model: Record<string, any>) => void)[]
+        beforeCallbacks?: ((self: T, model: Record<string, unknown>) => void)[],
+        afterCallbacks?: ((self: T, model: Record<string, unknown>) => void)[]
     }): Promise<T>
 
     validate(): Promise<void>
diff --git a/types/util/assert.d.ts b/types/util/assert.d.ts
index f6075fc..986be76 100644
--- a/types/util/assert.d.ts
+++ b/types/util/assert.d.ts
@@ -1 +1 @@
-export declare function verify(condition: boolean, message?: string, code?: number, exception?: any, kwargs?: any): void;
+export declare function verify(condition: boolean, message?: string, code?: number, exception?: unknown, kwargs?: unknown): void;
diff --git a/types/util/config.d.ts b/types/util/config.d.ts
index a42c91f..53a1d2d 100644
--- a/types/util/config.d.ts
+++ b/types/util/config.d.ts
@@ -1,2 +1,2 @@
-export declare function load(names?: Array<string>, path?: string, encoding?: string, force?: boolean, ctx?: any): Promise<void>;
-export declare function conf(name: string, fallback?: any, cast?: string, ctx?: any): any;
+export declare function load(names?: Array<string>, path?: string, encoding?: string, force?: boolean, ctx?: unknown): Promise<void>;
+export declare function conf(name: string, fallback?: unknown, cast?: string, ctx?: unknown): unknown;
diff --git a/types/util/data.d.ts b/types/util/data.d.ts
index 6c27ec4..4bb7d0f 100644
--- a/types/util/data.d.ts
+++ b/types/util/data.d.ts
@@ -1,9 +1,9 @@
 export declare function getObject(
-    params: Record<string, any>,
+    params: Record<string, unknown>,
     options: {
         alias?: boolean,
         page?: boolean,
         find?: boolean,
         norm?: boolean
     }
-): Record<string, any>;
+): Record<string, unknown>;
diff --git a/types/util/validation.d.ts b/types/util/validation.d.ts
index 193d442..4e4bde3 100644
--- a/types/util/validation.d.ts
+++ b/types/util/validation.d.ts
@@ -1,40 +1,63 @@
 export declare function eq<T>(
     valueC: T,
     message?: string
-): (value?: T, ctx?: any) => boolean;
+): (value?: T, ctx?: unknown) => boolean;
 
 export declare function gt<T>(
     valueC: T,
     message?: string
-): (value?: T, ctx?: any) => boolean;
+): (value?: T, ctx?: unknown) => boolean;
 
 export declare function gte<T>(
     valueC: T,
     message?: string
-): (value?: T, ctx?: any) => boolean;
+): (value?: T, ctx?: unknown) => boolean;
 
 export declare function notEmpty(
     message?: string
-): (value?: string | unknown[], ctx?: any) => boolean;
+): (value?: string | unknown[], ctx?: unknown) => boolean;
 
 export declare function isIn<T>(
     valueC: T[],
     message?: string
-): (value?: T, ctx?: any) => boolean;
+): (value?: T, ctx?: unknown) => boolean;
+
+export declare function isUpper(
+    message?: string
+): (value?: string, ctx?: unknown) => boolean;
+
+export declare function isLower(
+    message?: string
+): (value?: string, ctx?: unknown) => boolean;
 
 export declare function isSimple(
     message?: string
-): (value?: string, ctx?: any) => boolean;
+): (value?: string, ctx?: unknown) => boolean;
 
 export declare function isEmail(
     message?: string
-): (value?: string, ctx?: any) => boolean;
+): (value?: string, ctx?: unknown) => boolean;
 
 export declare function isUrl(
     message?: string
-): (value?: string, ctx?: any) => boolean;
+): (value?: string, ctx?: unknown) => boolean;
 
 export declare function isRegex(
     regex: string,
     message?: string
-): (value?: string, ctx?: any) => boolean;
+): (value?: string, ctx?: unknown) => boolean;
+
+export declare function stringGt(
+    valueC: number,
+    message?: string
+): (value?: string, ctx?: unknown) => boolean;
+
+export declare function stringLt(
+    valueC: number,
+    message?: string
+): (value?: string, ctx?: unknown) => boolean;
+
+export declare function stringEq(
+    valueC: number,
+    message?: string
+): (value?: string, ctx?: unknown) => boolean;