diff --git a/web/app/components/base/mermaid/index.tsx b/web/app/components/base/mermaid/index.tsx
index 80271bb29..44df3e394 100644
--- a/web/app/components/base/mermaid/index.tsx
+++ b/web/app/components/base/mermaid/index.tsx
@@ -117,7 +117,7 @@ const Flowchart = React.forwardRef((props: {
   const [isInitialized, setIsInitialized] = useState(false)
   const [currentTheme, setCurrentTheme] = useState<'light' | 'dark'>(props.theme || 'light')
   const containerRef = useRef<HTMLDivElement>(null)
-  const chartId = useRef(`mermaid-chart-${Math.random().toString(36).substr(2, 9)}`).current
+  const chartId = useRef(`mermaid-chart-${Math.random().toString(36).slice(2, 11)}`).current
   const [isLoading, setIsLoading] = useState(true)
   const renderTimeoutRef = useRef<NodeJS.Timeout>()
   const [errMsg, setErrMsg] = useState('')
diff --git a/web/app/components/base/prompt-editor/utils.ts b/web/app/components/base/prompt-editor/utils.ts
index 4b2570e69..e66517204 100644
--- a/web/app/components/base/prompt-editor/utils.ts
+++ b/web/app/components/base/prompt-editor/utils.ts
@@ -259,7 +259,7 @@ 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.slice(0, i))
       triggerOffset = i
   }
   return triggerOffset
diff --git a/web/app/routePrefixHandle.tsx b/web/app/routePrefixHandle.tsx
index 58b861b01..ee4ef722f 100644
--- a/web/app/routePrefixHandle.tsx
+++ b/web/app/routePrefixHandle.tsx
@@ -9,7 +9,7 @@ export default function RoutePrefixHandle() {
   const handleRouteChange = () => {
     const addPrefixToImg = (e: HTMLImageElement) => {
       const url = new URL(e.src)
-      const prefix = url.pathname.substr(0, basePath.length)
+      const prefix = url.pathname.slice(0, basePath.length)
       if (prefix !== basePath && !url.href.startsWith('blob:') && !url.href.startsWith('data:')) {
         url.pathname = basePath + url.pathname
         e.src = url.toString()