diff --git a/packages/lexical-playground/src/commenting/index.ts b/packages/lexical-playground/src/commenting/index.ts
index 59aa95baec0..c37469ba5e8 100644
--- a/packages/lexical-playground/src/commenting/index.ts
+++ b/packages/lexical-playground/src/commenting/index.ts
@@ -41,7 +41,7 @@ function createUID(): string {
   return Math.random()
     .toString(36)
     .replace(/[^a-z]+/g, '')
-    .substr(0, 5);
+    .substring(0, 5);
 }
 
 export function createComment(
diff --git a/packages/lexical-playground/src/nodes/PollNode.tsx b/packages/lexical-playground/src/nodes/PollNode.tsx
index f4f57f47cda..e6d25ce268d 100644
--- a/packages/lexical-playground/src/nodes/PollNode.tsx
+++ b/packages/lexical-playground/src/nodes/PollNode.tsx
@@ -35,7 +35,7 @@ function createUID(): string {
   return Math.random()
     .toString(36)
     .replace(/[^a-z]+/g, '')
-    .substr(0, 5);
+    .substring(0, 5);
 }
 
 export function createPollOption(text = ''): Option {
diff --git a/packages/lexical-playground/src/plugins/AutocompletePlugin/index.tsx b/packages/lexical-playground/src/plugins/AutocompletePlugin/index.tsx
index 6a3da055337..c2f94339fbb 100644
--- a/packages/lexical-playground/src/plugins/AutocompletePlugin/index.tsx
+++ b/packages/lexical-playground/src/plugins/AutocompletePlugin/index.tsx
@@ -51,7 +51,7 @@ type SearchPromise = {
 export const uuid = Math.random()
   .toString(36)
   .replace(/[^a-z]+/g, '')
-  .substr(0, 5);
+  .substring(0, 5);
 
 // TODO lookup should be custom
 function $search(selection: null | BaseSelection): [boolean, string] {
diff --git a/packages/lexical-react/src/shared/LexicalMenu.ts b/packages/lexical-react/src/shared/LexicalMenu.ts
index 39caca2816d..05fc084eb00 100644
--- a/packages/lexical-react/src/shared/LexicalMenu.ts
+++ b/packages/lexical-react/src/shared/LexicalMenu.ts
@@ -111,7 +111,7 @@ function getFullMatchOffset(
 ): number {
   let triggerOffset = offset;
   for (let i = triggerOffset; i <= entryText.length; i++) {
-    if (documentText.substr(-i) === entryText.substr(0, i)) {
+    if (documentText.slice(-i) === entryText.substring(0, i)) {
       triggerOffset = i;
     }
   }
diff --git a/packages/lexical/src/LexicalUtils.ts b/packages/lexical/src/LexicalUtils.ts
index 695d45d05c2..d61cb0587e7 100644
--- a/packages/lexical/src/LexicalUtils.ts
+++ b/packages/lexical/src/LexicalUtils.ts
@@ -649,7 +649,7 @@ export function createUID(): string {
   return Math.random()
     .toString(36)
     .replace(/[^a-z]+/g, '')
-    .substr(0, 5);
+    .substring(0, 5);
 }
 
 export function getAnchorTextFromDOM(anchorNode: Node): null | string {