diff --git a/packages/language-server/package.json b/packages/language-server/package.json
index fc66d7b54..612883700 100644
--- a/packages/language-server/package.json
+++ b/packages/language-server/package.json
@@ -58,6 +58,7 @@
         "svelte-preprocess": "~5.1.0",
         "svelte2tsx": "workspace:~",
         "typescript": "^5.3.2",
+        "typescript-auto-import-cache": "^0.3.0",
         "vscode-css-languageservice": "~6.2.10",
         "vscode-html-languageservice": "~5.1.1",
         "vscode-languageserver": "8.0.2",
diff --git a/packages/language-server/src/plugins/typescript/LSAndTSDocResolver.ts b/packages/language-server/src/plugins/typescript/LSAndTSDocResolver.ts
index 2d438cedb..45cb586d7 100644
--- a/packages/language-server/src/plugins/typescript/LSAndTSDocResolver.ts
+++ b/packages/language-server/src/plugins/typescript/LSAndTSDocResolver.ts
@@ -71,6 +71,10 @@ export class LSAndTSDocResolver {
         this.getCanonicalFileName = createGetCanonicalFileName(
             (options?.tsSystem ?? ts.sys).useCaseSensitiveFileNames
         );
+
+        configManager.onChange(() => {
+            this.configChanged = true;
+        });
     }
 
     /**
@@ -96,6 +100,8 @@ export class LSAndTSDocResolver {
     private extendedConfigCache = new Map<string, ts.ExtendedConfigCacheEntry>();
     private getCanonicalFileName: GetCanonicalFileName;
 
+    private configChanged = true;
+
     private get lsDocumentContext(): LanguageServiceDocumentContext {
         return {
             ambientTypesSource: this.options?.isSvelteCheck ? 'svelte-check' : 'svelte2tsx',
@@ -121,6 +127,11 @@ export class LSAndTSDocResolver {
     }> {
         const { tsDoc, lsContainer, userPreferences } = await this.getLSAndTSDocWorker(document);
 
+        if (this.configChanged) {
+            this.configChanged = false;
+            lsContainer.setUserPreferences(userPreferences);
+        }
+
         return { tsDoc, lang: lsContainer.getService(), userPreferences };
     }
 
diff --git a/packages/language-server/src/plugins/typescript/service.ts b/packages/language-server/src/plugins/typescript/service.ts
index 09cac7fba..e0f3da4ee 100644
--- a/packages/language-server/src/plugins/typescript/service.ts
+++ b/packages/language-server/src/plugins/typescript/service.ts
@@ -21,6 +21,7 @@ import {
     hasTsExtensions,
     isSvelteFilePath
 } from './utils';
+import { createLanguageService as createLanguageServiceWithCache } from 'typescript-auto-import-cache';
 
 export interface LanguageServiceContainer {
     readonly tsconfigPath: string;
@@ -47,6 +48,8 @@ export interface LanguageServiceContainer {
      */
     fileBelongsToProject(filePath: string, isNew: boolean): boolean;
 
+    setUserPreferences(preferences: ts.UserPreferences): void;
+
     dispose(): void;
 }
 
@@ -302,7 +305,6 @@ async function createLanguageService(
         tsSystem.useCaseSensitiveFileNames
     );
 
-    const languageService = ts.createLanguageService(host, documentRegistry);
     const transformationConfig: SvelteSnapshotOptions = {
         parse: svelteCompiler?.parse,
         version: svelteCompiler?.VERSION,
@@ -310,6 +312,14 @@ async function createLanguageService(
         typingsNamespace: raw?.svelteOptions?.namespace || 'svelteHTML'
     };
 
+    const serviceWithCache = createLanguageServiceWithCache(
+        ts as any,
+        tsSystemWithPackageJsonCache,
+        host,
+        () => ts.createLanguageService(host, documentRegistry)
+    );
+    const { languageService } = serviceWithCache;
+
     docContext.globalSnapshotsManager.onChange(scheduleUpdate);
 
     reduceLanguageServiceCapabilityIfFileSizeTooBig();
@@ -329,6 +339,7 @@ async function createLanguageService(
         fileBelongsToProject,
         snapshotManager,
         invalidateModuleCache,
+        setUserPreferences,
         dispose
     };
 
@@ -368,6 +379,8 @@ async function createLanguageService(
 
         if (!prevSnapshot) {
             svelteModuleLoader.deleteUnresolvedResolutionsFromCache(filePath);
+            // @ts-expect-error
+            host?.getCachedExportInfoMap()?.clear();
         }
 
         const newSnapshot = DocumentSnapshot.fromDocument(document, transformationConfig);
@@ -443,9 +456,20 @@ async function createLanguageService(
     function updateProjectFiles(): void {
         projectVersion++;
         dirty = true;
-        const projectFileCountBefore = snapshotManager.getProjectFileNames().length;
+        const projectFileBefore = snapshotManager.getProjectFileNames();
+        const projectFileCountBefore = projectFileBefore.length;
         snapshotManager.updateProjectFiles();
-        const projectFileCountAfter = snapshotManager.getProjectFileNames().length;
+        const projectFileAfter = snapshotManager.getProjectFileNames();
+        const projectFileCountAfter = projectFileAfter.length;
+
+        const hasAddedOrRemoved =
+            projectFileCountAfter !== projectFileCountBefore ||
+            checkProjectFileUpdate(projectFileBefore, projectFileAfter);
+
+        if (hasAddedOrRemoved) {
+            // @ts-expect-error
+            host?.getCachedExportInfoMap()?.clear();
+        }
 
         if (projectFileCountAfter <= projectFileCountBefore) {
             return;
@@ -454,6 +478,25 @@ async function createLanguageService(
         reduceLanguageServiceCapabilityIfFileSizeTooBig();
     }
 
+    function checkProjectFileUpdate(oldFiles: string[], newFiles: string[]) {
+        const oldSet = new Set(oldFiles);
+        const newSet = new Set(newFiles);
+
+        for (const file of oldSet) {
+            if (!newSet.has(file)) {
+                return true;
+            }
+        }
+
+        for (const file of newSet) {
+            if (!oldSet.has(file)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
     function getScriptFileNames() {
         const projectFiles = languageServiceReducedMode
             ? []
@@ -645,6 +688,10 @@ async function createLanguageService(
         }
     }
 
+    function setUserPreferences(userPreferences: ts.UserPreferences) {
+        serviceWithCache.setPreferences?.(userPreferences);
+    }
+
     function dispose() {
         languageService.dispose();
         snapshotManager.dispose();
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index f1fb51a95..cd08d4437 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -60,6 +60,9 @@ importers:
       typescript:
         specifier: ^5.3.2
         version: 5.3.2
+      typescript-auto-import-cache:
+        specifier: ^0.3.0
+        version: 0.3.0
       vscode-css-languageservice:
         specifier: ~6.2.10
         version: 6.2.10
@@ -1924,6 +1927,12 @@ packages:
     engines: {node: '>=4'}
     dev: true
 
+  /typescript-auto-import-cache@0.3.0:
+    resolution: {integrity: sha512-Rq6/q4O9iyqUdjvOoyas7x/Qf9nWUMeqpP3YeTaLA+uECgfy5wOhfOS+SW/+fZ/uI/ZcKaf+2/ZhFzXh8xfofQ==}
+    dependencies:
+      semver: 7.5.1
+    dev: false
+
   /typescript@5.3.2:
     resolution: {integrity: sha512-6l+RyNy7oAHDfxC4FzSJcz9vnjTKxrLpDG5M2Vu4SHRVNg6xzqZp6LYSR9zjqQTu8DU/f5xwxUdADOkbrIX2gQ==}
     engines: {node: '>=14.17'}