diff --git a/src/CONST.ts b/src/CONST.ts
index a50d79947aa3..dd85fee354d4 100755
--- a/src/CONST.ts
+++ b/src/CONST.ts
@@ -843,7 +843,7 @@ const CONST = {
         },
         RESERVED_ROOM_NAMES: ['#admins', '#announce'],
         MAX_PREVIEW_AVATARS: 4,
-        MAX_ROOM_NAME_LENGTH: 79,
+        MAX_ROOM_NAME_LENGTH: 99,
         LAST_MESSAGE_TEXT_MAX_LENGTH: 200,
         OWNER_EMAIL_FAKE: '__FAKE__',
         OWNER_ACCOUNT_ID_FAKE: 0,
@@ -1856,7 +1856,7 @@ const CONST = {
         CARD_NUMBER: /^[0-9]{15,16}$/,
         CARD_SECURITY_CODE: /^[0-9]{3,4}$/,
         CARD_EXPIRATION_DATE: /^(0[1-9]|1[0-2])([^0-9])?([0-9]{4}|([0-9]{2}))$/,
-        ROOM_NAME: /^#[\p{Ll}0-9-]{1,80}$/u,
+        ROOM_NAME: /^#[\p{Ll}0-9-]{1,100}$/u,
 
         // eslint-disable-next-line max-len, no-misleading-character-class
         EMOJI: /[\p{Extended_Pictographic}\u200d\u{1f1e6}-\u{1f1ff}\u{1f3fb}-\u{1f3ff}\u{e0020}-\u{e007f}\u20E3\uFE0F]|[#*0-9]\uFE0F?\u20E3/gu,
diff --git a/tests/unit/ValidationUtilsTest.ts b/tests/unit/ValidationUtilsTest.ts
index a14d71136b22..fc5dacee2cf2 100644
--- a/tests/unit/ValidationUtilsTest.ts
+++ b/tests/unit/ValidationUtilsTest.ts
@@ -241,8 +241,8 @@ describe('ValidationUtils', () => {
             expect(ValidationUtils.isValidRoomName('#')).toBe(false);
         });
 
-        test('room name with 81 characters', () => {
-            expect(ValidationUtils.isValidRoomName('#123456789012345678901234567890123456789012345678901234567890123456789012345678901')).toBe(false);
+        test('room name with 101 characters', () => {
+            expect(ValidationUtils.isValidRoomName('#12345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901')).toBe(false);
         });
 
         test('room name with lowercase letters, numbers, and dashes', () => {