diff --git a/.changeset/healthy-drinks-compete.md b/.changeset/healthy-drinks-compete.md
new file mode 100644
index 000000000000..80edab017183
--- /dev/null
+++ b/.changeset/healthy-drinks-compete.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+chore: upgrade esm-env for Vite 6 support
diff --git a/packages/svelte/package.json b/packages/svelte/package.json
index 61f2ec2d546b..5bf1863bc4c5 100644
--- a/packages/svelte/package.json
+++ b/packages/svelte/package.json
@@ -142,7 +142,7 @@
     "acorn-typescript": "^1.4.13",
     "aria-query": "^5.3.1",
     "axobject-query": "^4.1.0",
-    "esm-env": "^1.0.0",
+    "esm-env": "^1.2.0",
     "esrap": "^1.2.2",
     "is-reference": "^3.0.3",
     "locate-character": "^3.0.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 261a82f30081..2556f0c10022 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -81,8 +81,8 @@ importers:
         specifier: ^4.1.0
         version: 4.1.0
       esm-env:
-        specifier: ^1.0.0
-        version: 1.0.0
+        specifier: ^1.2.0
+        version: 1.2.0
       esrap:
         specifier: ^1.2.2
         version: 1.2.2
@@ -224,7 +224,7 @@ importers:
         version: 6.0.1(@lezer/common@1.2.1)
       esm-env:
         specifier: ^1.0.0
-        version: 1.0.0
+        version: 1.2.0
       marked:
         specifier: ^7.0.2
         version: 7.0.5
@@ -1236,7 +1236,7 @@ packages:
     resolution: {integrity: sha512-W9pAhw0ja1Edb5GVdIF1mjZw/ASI0AlShXM83UUGe2DVr5TdAPEA1OA8m/g8zWp9x6On7gqufY+FatDbC3MDQg==}
 
   concat-map@0.0.1:
-    resolution: {integrity: sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=}
+    resolution: {integrity: sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg==}
 
   console-control-strings@1.1.0:
     resolution: {integrity: sha512-ty/fTekppD2fIwRvnZAVdeOiGd1c7YXEixbgJTNzqcxJWKQnjJ/V1bNEEE6hygpM3WjwHFUVK6HTjWSzV4a8sQ==}
@@ -1442,8 +1442,8 @@ packages:
       jiti:
         optional: true
 
-  esm-env@1.0.0:
-    resolution: {integrity: sha512-Cf6VksWPsTuW01vU9Mk/3vRue91Zevka5SjyNf3nEpokFRuqt/KjUQoGAwq9qMmhpLTHmXzSIrFRw8zxWzmFBA==}
+  esm-env@1.2.0:
+    resolution: {integrity: sha512-OhSQuHL3mUcaQHjGe8UMG8GsJIJHYYz0flR0h9fiTPNMupLMkb7TvcRD0EeJXW5a8GHBgfz08b6FDLNK7kkPQA==}
 
   espree@10.1.0:
     resolution: {integrity: sha512-M1M6CpiE6ffoigIOWYO9UDP8TMUw9kqb21tf+08IgDYjCsOvCuDt4jQcZmoYxx+w7zlKw9/N0KXfto+I8/FrXA==}
@@ -3531,7 +3531,7 @@ snapshots:
       '@types/cookie': 0.6.0
       cookie: 0.6.0
       devalue: 5.1.1
-      esm-env: 1.0.0
+      esm-env: 1.2.0
       import-meta-resolve: 4.1.0
       kleur: 4.1.5
       magic-string: 0.30.11
@@ -3546,7 +3546,7 @@ snapshots:
   '@sveltejs/site-kit@6.0.0-next.64(@sveltejs/kit@2.8.3(@sveltejs/vite-plugin-svelte@4.0.0-next.6(svelte@packages+svelte)(vite@5.4.6(@types/node@20.12.7)(lightningcss@1.23.0)(sass@1.70.0)(terser@5.27.0)))(svelte@packages+svelte)(vite@5.4.6(@types/node@20.12.7)(lightningcss@1.23.0)(sass@1.70.0)(terser@5.27.0)))(svelte@packages+svelte)':
     dependencies:
       '@sveltejs/kit': 2.8.3(@sveltejs/vite-plugin-svelte@4.0.0-next.6(svelte@packages+svelte)(vite@5.4.6(@types/node@20.12.7)(lightningcss@1.23.0)(sass@1.70.0)(terser@5.27.0)))(svelte@packages+svelte)(vite@5.4.6(@types/node@20.12.7)(lightningcss@1.23.0)(sass@1.70.0)(terser@5.27.0))
-      esm-env: 1.0.0
+      esm-env: 1.2.0
       svelte: link:packages/svelte
       svelte-persisted-store: 0.9.2(svelte@packages+svelte)
 
@@ -4194,7 +4194,7 @@ snapshots:
     transitivePeerDependencies:
       - supports-color
 
-  esm-env@1.0.0: {}
+  esm-env@1.2.0: {}
 
   espree@10.1.0:
     dependencies: