diff --git a/package.json b/package.json
index e84b9c0..f040751 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "fluent-schema",
-  "version": "0.7.1",
+  "version": "0.7.2",
   "description": "JSON Schema fluent API",
   "main": "src/FluentSchema.js",
   "typings": "src/FluentSchema.d.ts",
diff --git a/src/BaseSchema.js b/src/BaseSchema.js
index da509db..01ac9c4 100644
--- a/src/BaseSchema.js
+++ b/src/BaseSchema.js
@@ -140,6 +140,34 @@ const BaseSchema = (
     return setAttribute({ schema, ...options }, ['default', defaults, 'any'])
   },
 
+  /**
+   * The value of readOnly can be left empty to indicate the property is readOnly.
+   * It takes an optional boolean which can be used to explicitly set readOnly true/false
+   *
+   * {@link readOnly|https://json-schema.org/latest/json-schema-validation.html#rfc.section.10.3}
+   * @param {boolean|undefined} isReadOnly
+   * @returns {BaseSchema}
+   */
+
+  readOnly: isReadOnly => {
+    const value = isReadOnly !== undefined ? isReadOnly : true
+    return setAttribute({ schema, ...options }, ['readOnly', value, 'boolean'])
+  },
+
+  /**
+   * The value of writeOnly can be left empty to indicate the property is writeOnly.
+   * It takes an optional boolean which can be used to explicitly set writeOnly true/false
+   *
+   * {@link writeOnly|https://json-schema.org/latest/json-schema-validation.html#rfc.section.10.3}
+   * @param {boolean|undefined} isWriteOnly
+   * @returns {BaseSchema}
+   */
+
+  writeOnly: isWriteOnly => {
+    const value = isWriteOnly !== undefined ? isWriteOnly : true
+    return setAttribute({ schema, ...options }, ['writeOnly', value, 'boolean'])
+  },
+
   /**
    * Required has to be chained to a property:
    * Examples:
diff --git a/src/BaseSchema.test.js b/src/BaseSchema.test.js
index ce8b158..3cfd13e 100644
--- a/src/BaseSchema.test.js
+++ b/src/BaseSchema.test.js
@@ -205,6 +205,54 @@ describe('BaseSchema', () => {
       })
     })
 
+    describe('readOnly', () => {
+      it('valid', () => {
+        expect(
+          BaseSchema()
+            .readOnly(true)
+            .valueOf().readOnly
+        ).toEqual(true)
+      })
+      it('valid with no value', () => {
+        expect(
+          BaseSchema()
+            .readOnly()
+            .valueOf().readOnly
+        ).toEqual(true)
+      })
+      it('can be set to false', () => {
+        expect(
+          BaseSchema()
+            .readOnly(false)
+            .valueOf().readOnly
+        ).toEqual(false)
+      })
+    })
+
+    describe('writeOnly', () => {
+      it('valid', () => {
+        expect(
+          BaseSchema()
+            .writeOnly(true)
+            .valueOf().writeOnly
+        ).toEqual(true)
+      })
+      it('valid with no value', () => {
+        expect(
+          BaseSchema()
+            .writeOnly()
+            .valueOf().writeOnly
+        ).toEqual(true)
+      })
+      it('can be set to false', () => {
+        expect(
+          BaseSchema()
+            .writeOnly(false)
+            .valueOf().writeOnly
+        ).toEqual(false)
+      })
+    })
+
     describe('ref', () => {
       it('base', () => {
         const ref = 'myRef'
diff --git a/src/FluentSchema.d.ts b/src/FluentSchema.d.ts
index 3e41571..1db3ff0 100644
--- a/src/FluentSchema.d.ts
+++ b/src/FluentSchema.d.ts
@@ -18,6 +18,8 @@ export interface BaseSchema<T> {
   anyOf: (schema: Array<JSONSchema>) => T
   allOf: (schema: Array<JSONSchema>) => T
   oneOf: (schema: Array<JSONSchema>) => T
+  readOnly: (isReadOnly?: boolean) => T
+  writeOnly: (isWriteOnly?: boolean) => T
 }
 
 export type TYPE =
diff --git a/src/types/index.ts b/src/types/index.ts
index c1f96b1..3b21499 100644
--- a/src/types/index.ts
+++ b/src/types/index.ts
@@ -48,6 +48,8 @@ const schema = S.object()
   .required()
   .prop('age', S.mixed<NumberSchema & StringSchema>(['string', 'integer']))
   .ifThen(S.object().prop('age', S.string()), S.required(['age']))
+  .readOnly()
+  .writeOnly(true)
 
   .valueOf()