diff --git a/.changeset/tired-mugs-wave.md b/.changeset/tired-mugs-wave.md
new file mode 100644
index 000000000..032497635
--- /dev/null
+++ b/.changeset/tired-mugs-wave.md
@@ -0,0 +1,5 @@
+---
+"aws-sdk-js-codemod": patch
+---
+
+Bump TypeScript to 5.9
diff --git a/package.json b/package.json
index a70d0a197..72e5f2bf9 100644
--- a/package.json
+++ b/package.json
@@ -52,7 +52,7 @@
     "@types/node": "^18.19.112",
     "aws-sdk": "2.1692.0",
     "tsx": "^4.20.3",
-    "typescript": "~5.8.3"
+    "typescript": "~5.9.2"
   },
   "engines": {
     "node": ">=18.0.0"
diff --git a/yarn.lock b/yarn.lock
index d93fc5ec3..7d894c7e6 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1210,7 +1210,7 @@ __metadata:
     aws-sdk: "npm:2.1692.0"
     jscodeshift: "npm:17.3.0"
     tsx: "npm:^4.20.3"
-    typescript: "npm:~5.8.3"
+    typescript: "npm:~5.9.2"
   bin:
     aws-sdk-js-codemod: bin/aws-sdk-js-codemod
   languageName: unknown
@@ -3216,23 +3216,23 @@ __metadata:
   languageName: node
   linkType: hard
 
-"typescript@npm:~5.8.3":
-  version: 5.8.3
-  resolution: "typescript@npm:5.8.3"
+"typescript@npm:~5.9.2":
+  version: 5.9.2
+  resolution: "typescript@npm:5.9.2"
   bin:
     tsc: bin/tsc
     tsserver: bin/tsserver
-  checksum: 10c0/5f8bb01196e542e64d44db3d16ee0e4063ce4f3e3966df6005f2588e86d91c03e1fb131c2581baf0fb65ee79669eea6e161cd448178986587e9f6844446dbb48
+  checksum: 10c0/cd635d50f02d6cf98ed42de2f76289701c1ec587a363369255f01ed15aaf22be0813226bff3c53e99d971f9b540e0b3cc7583dbe05faded49b1b0bed2f638a18
   languageName: node
   linkType: hard
 
-"typescript@patch:typescript@npm%3A~5.8.3#optional!builtin<compat/typescript>":
-  version: 5.8.3
-  resolution: "typescript@patch:typescript@npm%3A5.8.3#optional!builtin<compat/typescript>::version=5.8.3&hash=5786d5"
+"typescript@patch:typescript@npm%3A~5.9.2#optional!builtin<compat/typescript>":
+  version: 5.9.2
+  resolution: "typescript@patch:typescript@npm%3A5.9.2#optional!builtin<compat/typescript>::version=5.9.2&hash=5786d5"
   bin:
     tsc: bin/tsc
     tsserver: bin/tsserver
-  checksum: 10c0/39117e346ff8ebd87ae1510b3a77d5d92dae5a89bde588c747d25da5c146603a99c8ee588c7ef80faaf123d89ed46f6dbd918d534d641083177d5fac38b8a1cb
+  checksum: 10c0/34d2a8e23eb8e0d1875072064d5e1d9c102e0bdce56a10a25c0b917b8aa9001a9cf5c225df12497e99da107dc379360bc138163c66b55b95f5b105b50578067e
   languageName: node
   linkType: hard