diff --git a/docs/classes/google-spreadsheet-worksheet.md b/docs/classes/google-spreadsheet-worksheet.md
index 4246fe9..0f25de9 100644
--- a/docs/classes/google-spreadsheet-worksheet.md
+++ b/docs/classes/google-spreadsheet-worksheet.md
@@ -289,6 +289,30 @@ Param|Type|Required|Description
 - ✨ **Side effects** - new row(s) or column(s) are inserted into the sheet
 - 🚨 **Warning** - Does not update cached rows/cells, so be sure to reload rows/cells before trying to make any updates to sheet contents
 
+### Protected Ranges
+
+#### `addProtectedRange(protectedRange)` (async) :id=fn-addProtectedRange
+> Adds a new protected range.
+
+Param|Type|Required|Description
+---|---|---|---
+`protectedRange`|Object<br>[ProtectedRange](https://developers.google.com/sheets/api/reference/rest/v4/spreadsheets/sheets#protectedrange)|✅|The protected range to be added. The protectedRangeId field is optional; if one is not set, an id will be randomly generated. (It is an error to specify the ID of a range that already exists.)
+
+#### `updateProtectedRange(protectedRange, fields)` (async) :id=fn-updateProtectedRange
+> Updates an existing protected range with the specified protectedRangeId.
+
+Param|Type|Required|Description
+---|---|---|---
+`protectedRange`|Object<br>[ProtectedRange](https://developers.google.com/sheets/api/reference/rest/v4/spreadsheets/sheets#protectedrange)|✅|The protected range to update with the new properties.
+`fields`|String|✅|The fields that should be updated. At least one field must be specified. The root protectedRange is implied and should not be specified. A single "*" can be used as short-hand for listing every field.
+
+#### `deleteProtectedRange(protectedRangeId)` (async) :id=fn-deleteProtectedRange
+> Deletes the protected range with the given ID.
+
+Param|Type|Required|Description
+---|---|---|---
+`protectedRangeId`|Number|✅|The ID of the protected range to delete.
+
 ### Other
 
 #### `clear(a1Range)` (async) :id=fn-clear
diff --git a/src/lib/GoogleSpreadsheet.ts b/src/lib/GoogleSpreadsheet.ts
index 656d3f3..ccea4ad 100644
--- a/src/lib/GoogleSpreadsheet.ts
+++ b/src/lib/GoogleSpreadsheet.ts
@@ -7,7 +7,7 @@ import * as _ from './lodash';
 import { GoogleSpreadsheetWorksheet } from './GoogleSpreadsheetWorksheet';
 import { axiosParamsSerializer, getFieldMask } from './utils';
 import {
-  DataFilter, GridRange, NamedRangeId, SpreadsheetId, SpreadsheetProperties, WorksheetId, WorksheetProperties,
+  DataFilter, GridRange, NamedRangeId, ProtectedRange, SpreadsheetId, SpreadsheetProperties, WorksheetId, WorksheetProperties,
 } from './types/sheets-types';
 import { PermissionRoles, PermissionsList, PublicPermissionRoles } from './types/drive-types';
 import { RecursivePartial } from './types/util-types';
@@ -223,13 +223,13 @@ export class GoogleSpreadsheet {
   _updateRawProperties(newProperties: SpreadsheetProperties) { this._rawProperties = newProperties; }
 
   /** @internal */
-  _updateOrCreateSheet(sheetInfo: { properties: WorksheetProperties, data: any }) {
-    const { properties, data } = sheetInfo;
+  _updateOrCreateSheet(sheetInfo: { properties: WorksheetProperties, data: any, protectedRanges?: ProtectedRange[] }) {
+    const { properties, data, protectedRanges } = sheetInfo;
     const { sheetId } = properties;
     if (!this._rawSheets[sheetId]) {
-      this._rawSheets[sheetId] = new GoogleSpreadsheetWorksheet(this, properties, data);
+      this._rawSheets[sheetId] = new GoogleSpreadsheetWorksheet(this, properties, data, protectedRanges);
     } else {
-      this._rawSheets[sheetId].updateRawData(properties, data);
+      this._rawSheets[sheetId].updateRawData(properties, data, protectedRanges);
     }
   }
 
diff --git a/src/lib/GoogleSpreadsheetWorksheet.ts b/src/lib/GoogleSpreadsheetWorksheet.ts
index 176dbf7..0fc40e8 100644
--- a/src/lib/GoogleSpreadsheetWorksheet.ts
+++ b/src/lib/GoogleSpreadsheetWorksheet.ts
@@ -13,6 +13,8 @@ import {
   RowIndex, ColumnIndex, DataFilterWithoutWorksheetId, DataFilter, GetValuesRequestOptions, WorksheetGridProperties,
   WorksheetDimensionProperties, CellDataRange, AddRowOptions, GridRangeWithOptionalWorksheetId,
   DataValidationRule,
+  ProtectedRange,
+  Integer,
 } from './types/sheets-types';
 
 
@@ -29,6 +31,7 @@ export class GoogleSpreadsheetWorksheet {
   private _cells: GoogleSpreadsheetCell[][] = [];
   private _rowMetadata: any[] = [];
   private _columnMetadata: any[] = [];
+  private _protectedRanges: ProtectedRange[] | null = null;
 
   private _headerValues: string[] | undefined;
   get headerValues() {
@@ -42,7 +45,8 @@ export class GoogleSpreadsheetWorksheet {
     /** parent GoogleSpreadsheet instance */
     readonly _spreadsheet: GoogleSpreadsheet,
     rawProperties: WorksheetProperties,
-    rawCellData?: CellDataRange[]
+    rawCellData?: CellDataRange[],
+    protectedRanges?: ProtectedRange[]
   ) {
     this._headerRowIndex = 1;
 
@@ -53,6 +57,7 @@ export class GoogleSpreadsheetWorksheet {
 
     this._rowMetadata = []; // 1d sparse array
     this._columnMetadata = [];
+    if(protectedRanges) this._protectedRanges = protectedRanges;
 
     if (rawCellData) this._fillCellData(rawCellData);
   }
@@ -166,6 +171,7 @@ export class GoogleSpreadsheetWorksheet {
   get hidden() { return this._getProp('hidden'); }
   get tabColor() { return this._getProp('tabColor'); }
   get rightToLeft() { return this._getProp('rightToLeft'); }
+  get protectedRanges() { return this._protectedRanges; }
   private get _headerRange() {
     return `A${this._headerRowIndex}:${this.lastColumnLetter}${this._headerRowIndex}`;
   }
@@ -864,20 +870,43 @@ export class GoogleSpreadsheetWorksheet {
     // Request type = `setBasicFilter`
     // https://developers.google.com/sheets/api/reference/rest/v4/spreadsheets/request#SetBasicFilterRequest
   }
+  
+  /**
+   * Adds a new protected range.
+   * @see https://developers.google.com/sheets/api/reference/rest/v4/spreadsheets/request#AddProtectedRangeRequest
+   */
+  async addProtectedRange(protectedRange: ProtectedRange) {
+
 
-  async addProtectedRange() {
-    // Request type = `addProtectedRange`
-    // https://developers.google.com/sheets/api/reference/rest/v4/spreadsheets/request#AddProtectedRangeRequest
+    // check of range definition
+    if (!protectedRange.range && !protectedRange.namedRangeId) {
+      throw new Error('No range specified: range or namedRangeId required');
+    }
+
+    return this._makeSingleUpdateRequest('addProtectedRange', {
+      protectedRange: protectedRange
+    });
   }
 
-  async updateProtectedRange() {
-    // Request type = `updateProtectedRange`
-    // https://developers.google.com/sheets/api/reference/rest/v4/spreadsheets/request#UpdateProtectedRangeRequest
+  /**
+   * Updates an existing protected range with the specified protectedRangeId.
+   * @see https://developers.google.com/sheets/api/reference/rest/v4/spreadsheets/request#UpdateProtectedRangeRequest
+   */
+  async updateProtectedRange(protectedRange: ProtectedRange, fields: string) {
+    return this._makeSingleUpdateRequest('updateProtectedRange', {
+      protectedRange: protectedRange,
+      fields: fields
+    });
   }
 
-  async deleteProtectedRange() {
-    // Request type = `deleteProtectedRange`
-    // https://developers.google.com/sheets/api/reference/rest/v4/spreadsheets/request#DeleteProtectedRangeRequest
+  /**
+   * Deletes the protected range with the given ID.
+   * @see https://developers.google.com/sheets/api/reference/rest/v4/spreadsheets/request#DeleteProtectedRangeRequest
+   */
+  async deleteProtectedRange(protectedRangeId: Integer) {
+    return this._makeSingleUpdateRequest('deleteProtectedRange', {
+      protectedRangeId: protectedRangeId
+    });
   }
 
   async autoResizeDimensions() {
diff --git a/src/lib/types/sheets-types.ts b/src/lib/types/sheets-types.ts
index 3777d59..bfdee6e 100644
--- a/src/lib/types/sheets-types.ts
+++ b/src/lib/types/sheets-types.ts
@@ -413,6 +413,41 @@ export type GridRangeWithOptionalWorksheetId = MakeOptional<GridRange, 'sheetId'
 export type DataFilter = A1Range | GridRange;
 export type DataFilterWithoutWorksheetId = A1Range | GridRangeWithoutWorksheetId;
 
+/**
+ * object describing the ediors of a protected range in a sheet
+ * see https://developers.google.com/sheets/api/reference/rest/v4/spreadsheets/sheets#editors
+ * */
+export type Editors = {
+  /** The email addresses of users with edit access to the protected range. */
+  users?: string[],
+  /** The email addresses of groups with edit access to the protected range. */
+  groups?: string[],
+  /** True if anyone in the document's domain has edit access to the protected range. */
+  domainUsersCanEdit?: boolean
+};
+
+/**
+ * object describing a protected range in a sheet
+ * see https://developers.google.com/sheets/api/reference/rest/v4/spreadsheets/sheets#protectedrange
+ * */
+export type ProtectedRange = {
+  /** The ID of the protected range. This field is read-only. */
+  protectedRangeId?: Integer,
+  /** The range that is being protected. */
+  range?: GridRange,
+  /** The named range this protected range is backed by, if any. */
+  namedRangeId?: NamedRangeId,
+  /** The description of this protected range. */
+  description: string,
+  /** True if this protected range will show a warning when editing. */
+  warningOnly: boolean,
+  /** True if the user who requested this protected range can edit the protected area. This field is read-only. */
+  requestingUserCanEdit?: boolean,
+  /** The list of unprotected ranges within a protected sheet. */
+  unprotectedRanges?: GridRange[];
+  /** The users and groups with edit access to the protected range. */
+  editors: Editors
+}
 
 /** @see https://developers.google.com/sheets/api/reference/rest/v4/spreadsheets/other#colorstyle */
 export type ColorStyle = { rgbColor: Color } | { themeColor: ThemeColorType };