diff --git a/packages/schema/src/types/basic.ts b/packages/schema/src/types/basic.ts
index f086778f..686cea1f 100644
--- a/packages/schema/src/types/basic.ts
+++ b/packages/schema/src/types/basic.ts
@@ -5,6 +5,7 @@ import {
   isNumericString,
   toValidator,
   coerceNumericStringToNumber,
+  coerceBigIntStringToNumber,
 } from '../utils';
 
 function isValidStringValue(value: unknown): value is string {
@@ -44,3 +45,19 @@ export function boolean(): Schema<boolean, boolean> {
     map: value => (typeof value === 'boolean' ? value : value === 'true'),
   });
 }
+
+function isValidBigIntValue(value: unknown): value is bigint {
+  return (
+    typeof value === 'bigint' ||
+    (typeof value === 'string' && /^-?\d+$/.test(value))
+  );
+}
+
+/** Create a bigint schema */
+export function bigint(): Schema<bigint, bigint> {
+  return createSymmetricSchema({
+    type: 'bigint',
+    validate: toValidator(isValidBigIntValue),
+    map: coerceBigIntStringToNumber,
+  });
+}
diff --git a/packages/schema/src/utils.ts b/packages/schema/src/utils.ts
index 61074ebd..7ff615a9 100644
--- a/packages/schema/src/utils.ts
+++ b/packages/schema/src/utils.ts
@@ -102,6 +102,10 @@ export function coerceNumericStringToNumber(value: number | string): number {
   return typeof value === 'number' ? value : +value;
 }
 
+export function coerceBigIntStringToNumber(value: bigint | string): bigint {
+  return typeof value === 'bigint' ? value : BigInt(value);
+}
+
 export function once<Args extends any[], R>(
   func: (...args: Args) => R
 ): (...args: Args) => R {
diff --git a/packages/schema/test/types/bigInt.test.ts b/packages/schema/test/types/bigInt.test.ts
new file mode 100644
index 00000000..c9dd1bdc
--- /dev/null
+++ b/packages/schema/test/types/bigInt.test.ts
@@ -0,0 +1,120 @@
+import { bigint, validateAndMap, validateAndUnmap } from '../../src';
+describe('bigint', () => {
+  describe('Mapping', () => {
+    it('should accept bigint', () => {
+      const input = BigInt(9532532599932);
+      const schema = bigint();
+      const output = validateAndMap(input, schema);
+      expect(output.errors).toBeFalsy();
+      expect((output as any).result).toBe(input);
+    });
+
+    it('should accept negative bigint', () => {
+      const input = BigInt(-9532532599932);
+      const schema = bigint();
+      const output = validateAndMap(input, schema);
+      expect(output.errors).toBeFalsy();
+      expect((output as any).result).toBe(input);
+    });
+
+    it('should accept bigint string', () => {
+      const input = '9532532599932';
+      const schema = bigint();
+      const output = validateAndMap(input as any, schema);
+      expect(output.errors).toBeFalsy();
+      expect((output as any).result).toBe(BigInt(input));
+    });
+
+    it('should accept negative bigint string', () => {
+      const input = '-9532532599932';
+      const schema = bigint();
+      const output = validateAndMap(input as any, schema);
+      expect(output.errors).toBeFalsy();
+      expect((output as any).result).toBe(BigInt(input));
+    });
+
+    it('should fail on other types', () => {
+      const input = true;
+      const schema = bigint();
+      const output = validateAndMap(input as any, schema);
+      expect((output as any).result).toBeUndefined();
+      expect(output.errors).toHaveLength(1);
+      expect(output.errors).toMatchInlineSnapshot(`
+        Array [
+          Object {
+            "branch": Array [
+              true,
+            ],
+            "message": "Expected value to be of type 'bigint' but found 'boolean'.
+
+        Given value: true
+        Type: 'boolean'
+        Expected type: 'bigint'",
+            "path": Array [],
+            "type": "bigint",
+            "value": true,
+          },
+        ]
+      `);
+    });
+  });
+
+  describe('Unmapping', () => {
+    it('should accept bigint', () => {
+      const input = BigInt(9532532599932);
+      const schema = bigint();
+      const output = validateAndUnmap(input, schema);
+      expect(output.errors).toBeFalsy();
+      expect((output as any).result).toBe(input);
+    });
+
+    it('should accept negative bigint', () => {
+      const input = BigInt(-9532532599932);
+      const schema = bigint();
+      const output = validateAndUnmap(input, schema);
+      expect(output.errors).toBeFalsy();
+      expect((output as any).result).toBe(input);
+    });
+
+    it('should accept bigint string', () => {
+      const input = '9532532599932';
+      const schema = bigint();
+      const output = validateAndUnmap(input as any, schema);
+      expect(output.errors).toBeFalsy();
+      expect((output as any).result).toBe(BigInt(input));
+    });
+
+    it('should accept negative bigint string', () => {
+      const input = '-9532532599932';
+      const schema = bigint();
+      const output = validateAndUnmap(input as any, schema);
+      expect(output.errors).toBeFalsy();
+      expect((output as any).result).toBe(BigInt(input));
+    });
+
+    it('should fail on other types', () => {
+      const input = true;
+      const schema = bigint();
+      const output = validateAndUnmap(input as any, schema);
+      expect((output as any).result).toBeUndefined();
+      expect(output.errors).toHaveLength(1);
+      expect(output.errors).toMatchInlineSnapshot(`
+        Array [
+          Object {
+            "branch": Array [
+              true,
+            ],
+            "message": "Expected value to be of type 'bigint' but found 'boolean'.
+
+        Given value: true
+        Type: 'boolean'
+        Expected type: 'bigint'",
+            "path": Array [],
+            "type": "bigint",
+            "value": true,
+          },
+        ]
+      `);
+    });
+  });
+});