diff --git a/.changeset/warm-ducks-shake.md b/.changeset/warm-ducks-shake.md
new file mode 100644
index 000000000000..c8ff1d48f0a7
--- /dev/null
+++ b/.changeset/warm-ducks-shake.md
@@ -0,0 +1,5 @@
+---
+"svelte-migrate": patch
+---
+
+chore(deps): update dependency ts-morph to v21
diff --git a/packages/migrate/package.json b/packages/migrate/package.json
index 90520af8b54b..a53396fdfea2 100644
--- a/packages/migrate/package.json
+++ b/packages/migrate/package.json
@@ -29,7 +29,7 @@
 		"prompts": "^2.4.2",
 		"semver": "^7.5.3",
 		"tiny-glob": "^0.2.9",
-		"ts-morph": "^20.0.0",
+		"ts-morph": "^21.0.0",
 		"typescript": "^5.0.4"
 	},
 	"devDependencies": {
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 335adfb1f9f1..064ec62a9413 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -946,8 +946,8 @@ importers:
         specifier: ^0.2.9
         version: 0.2.9
       ts-morph:
-        specifier: ^20.0.0
-        version: 20.0.0
+        specifier: ^21.0.0
+        version: 21.0.1
       typescript:
         specifier: ^5.0.4
         version: 5.0.4
@@ -2112,12 +2112,12 @@ packages:
       - encoding
     dev: true
 
-  /@ts-morph/common@0.21.0:
-    resolution: {integrity: sha512-ES110Mmne5Vi4ypUKrtVQfXFDtCsDXiUiGxF6ILVlE90dDD4fdpC1LSjydl/ml7xJWKSDZwUYD2zkOePMSrPBA==}
+  /@ts-morph/common@0.22.0:
+    resolution: {integrity: sha512-HqNBuV/oIlMKdkLshXd1zKBqNQCsuPEsgQOkfFQ/eUKjRlwndXW1AjN9LVkBEIukm00gGXSRmfkl0Wv5VXLnlw==}
     dependencies:
-      fast-glob: 3.3.1
-      minimatch: 7.4.6
-      mkdirp: 2.1.6
+      fast-glob: 3.3.2
+      minimatch: 9.0.3
+      mkdirp: 3.0.1
       path-browserify: 1.0.1
     dev: false
 
@@ -3610,6 +3610,18 @@ packages:
       glob-parent: 5.1.2
       merge2: 1.4.1
       micromatch: 4.0.5
+    dev: true
+
+  /fast-glob@3.3.2:
+    resolution: {integrity: sha512-oX2ruAFQwf/Orj8m737Y5adxDQO0LAB7/S5MnxCdTNDd4p6BsyIVsv9JQsATbTSq8KHRpLwIHbVlUNatxd+1Ow==}
+    engines: {node: '>=8.6.0'}
+    dependencies:
+      '@nodelib/fs.stat': 2.0.5
+      '@nodelib/fs.walk': 1.2.8
+      glob-parent: 5.1.2
+      merge2: 1.4.1
+      micromatch: 4.0.5
+    dev: false
 
   /fast-json-stable-stringify@2.1.0:
     resolution: {integrity: sha512-lhd/wF+Lk98HZoTCtlVraHtfh5XYijIjalXck7saUtuanSDyLMxnHhSXEDJqHxD7msR8D0uCmqlkwjCV8xvwHw==}
@@ -4619,9 +4631,9 @@ packages:
     dependencies:
       brace-expansion: 2.0.1
 
-  /minimatch@7.4.6:
-    resolution: {integrity: sha512-sBz8G/YjVniEz6lKPNpKxXwazJe4c19fEfV2GDMX6AjFz+MX9uDWIZW8XreVhkFW3fkIdTv/gxWr/Kks5FFAVw==}
-    engines: {node: '>=10'}
+  /minimatch@9.0.3:
+    resolution: {integrity: sha512-RHiac9mvaRw0x3AYRgDC1CxAP7HTcNrrECeA8YYJeWnpo+2Q5CegtZjaotWTWxDG3UeGA1coE05iH1mPjT/2mg==}
+    engines: {node: '>=16 || 14 >=14.17'}
     dependencies:
       brace-expansion: 2.0.1
     dev: false
@@ -4680,8 +4692,8 @@ packages:
     hasBin: true
     dev: false
 
-  /mkdirp@2.1.6:
-    resolution: {integrity: sha512-+hEnITedc8LAtIP9u3HJDFIdcLV2vXP33sqLLIzkv1Db1zO/1OxbvYf0Y1OC/S/Qo5dxHXepofhmxL02PsKe+A==}
+  /mkdirp@3.0.1:
+    resolution: {integrity: sha512-+NsyUUAZDmo6YVHzL/stxSu3t9YS1iljliy3BSDrXJ/dkn1KYdmtZODGGjLcc9XLgVVpH4KshHB8XmZgMhaBXg==}
     engines: {node: '>=10'}
     hasBin: true
     dev: false
@@ -6101,10 +6113,10 @@ packages:
     resolution: {integrity: sha512-Y/arvbn+rrz3JCKl9C4kVNfTfSm2/mEp5FSz5EsZSANGPSlQrpRI5M4PKF+mJnE52jOO90PnPSc3Ur3bTQw0gA==}
     dev: true
 
-  /ts-morph@20.0.0:
-    resolution: {integrity: sha512-JVmEJy2Wow5n/84I3igthL9sudQ8qzjh/6i4tmYCm6IqYyKFlNbJZi7oBdjyqcWSWYRu3CtL0xbT6fS03ESZIg==}
+  /ts-morph@21.0.1:
+    resolution: {integrity: sha512-dbDtVdEAncKctzrVZ+Nr7kHpHkv+0JDJb2MjjpBaj8bFeCkePU9rHfMklmhuLFnpeq/EJZk2IhStY6NzqgjOkg==}
     dependencies:
-      '@ts-morph/common': 0.21.0
+      '@ts-morph/common': 0.22.0
       code-block-writer: 12.0.0
     dev: false