diff --git a/.changeset/fuzzy-seas-reply.md b/.changeset/fuzzy-seas-reply.md
new file mode 100644
index 000000000..555d54067
--- /dev/null
+++ b/.changeset/fuzzy-seas-reply.md
@@ -0,0 +1,5 @@
+---
+'@electric-sql/pglite': patch
+---
+
+Fix convert_to
diff --git a/packages/pglite/tests/basic.test.ts b/packages/pglite/tests/basic.test.ts
index b45c562f2..c21c34cfd 100644
--- a/packages/pglite/tests/basic.test.ts
+++ b/packages/pglite/tests/basic.test.ts
@@ -932,5 +932,33 @@ await testEsmCjsAndDTC(async (importType) => {
         rowCount: 1,
       })
     })
+    it('serialize with no concrete type', async () => {
+      const res0 = await db.exec(`SELECT 1`)
+
+      const res1 = await db.exec(`SELECT convert_to('abc', 'LATIN1')`)
+
+      expect(res1).toEqual([
+        {
+          rows: [
+            {
+              convert_to: new Uint8Array([97, 98, 99]),
+            },
+          ],
+          fields: [
+            {
+              name: 'convert_to',
+              dataTypeID: 17,
+            },
+          ],
+          command: 'SELECT',
+          affectedRows: 0,
+          rowCount: 1,
+        },
+      ])
+
+      const res2 = await db.exec(`SELECT 1`)
+
+      expect(res2).toEqual(res0)
+    })
   })
 })
diff --git a/postgres-pglite b/postgres-pglite
index 0090558b9..6dab6d9c3 160000
--- a/postgres-pglite
+++ b/postgres-pglite
@@ -1 +1 @@
-Subproject commit 0090558b9522cdcdce206d282c062d01334524cd
+Subproject commit 6dab6d9c37607f32b56d4778b6de95ac0d7438fc