diff --git a/.changeset/modern-cycles-work.md b/.changeset/modern-cycles-work.md
new file mode 100644
index 000000000..8d3fb3878
--- /dev/null
+++ b/.changeset/modern-cycles-work.md
@@ -0,0 +1,5 @@
+---
+'@electric-sql/pglite': minor
+---
+
+Upgraded to PostgreSQL 18.3
diff --git a/packages/pglite-tools/src/pg_dump.ts b/packages/pglite-tools/src/pg_dump.ts
index acd32dd2b..7fb2f1a23 100644
--- a/packages/pglite-tools/src/pg_dump.ts
+++ b/packages/pglite-tools/src/pg_dump.ts
@@ -170,7 +170,13 @@ export async function pgDump({
     )
   }
 
-  const file = new File([execResult.fileContents], fileName, {
+  // remove \\restrict and \\unrestrict commands https://www.postgresql.org/docs/17/app-psql.html#APP-PSQL-META-COMMAND-RESTRICT
+  const contentsPruned = execResult.fileContents.replace(
+    /^(?:\\(?:un)?restrict\b.*\r?\n?)/gim,
+    '',
+  )
+
+  const file = new File([contentsPruned], fileName, {
     type: 'text/plain',
   })
 
diff --git a/packages/pglite/src/pglite.ts b/packages/pglite/src/pglite.ts
index 297efd2b8..fa1a09644 100644
--- a/packages/pglite/src/pglite.ts
+++ b/packages/pglite/src/pglite.ts
@@ -129,6 +129,8 @@ export class PGlite
     'max_parallel_workers=0',
     '-c',
     'max_parallel_workers_per_gather=0',
+    '-c',
+    'io_method=sync',
   ]
 
   /**
diff --git a/packages/pglite/tests/contrib/amcheck.test.js b/packages/pglite/tests/contrib/amcheck.test.js
index 87ec07efc..284dad4c7 100644
--- a/packages/pglite/tests/contrib/amcheck.test.js
+++ b/packages/pglite/tests/contrib/amcheck.test.js
@@ -33,17 +33,17 @@ it('amcheck', async () => {
     {
       bt_index_check: '',
       relname: 'pg_proc_proname_args_nsp_index',
-      relpages: 32,
+      relpages: 33,
     },
     {
       bt_index_check: '',
       relname: 'pg_description_o_c_o_index',
-      relpages: 23,
+      relpages: 24,
     },
     {
       bt_index_check: '',
       relname: 'pg_attribute_relid_attnam_index',
-      relpages: 15,
+      relpages: 16,
     },
     {
       bt_index_check: '',
@@ -67,17 +67,17 @@ it('amcheck', async () => {
     },
     {
       bt_index_check: '',
-      relname: 'pg_amop_fam_strat_index',
+      relname: 'pg_operator_oprname_l_r_n_index',
       relpages: 6,
     },
     {
       bt_index_check: '',
-      relname: 'pg_operator_oprname_l_r_n_index',
+      relname: 'pg_amop_fam_strat_index',
       relpages: 6,
     },
     {
       bt_index_check: '',
-      relname: 'pg_amop_opr_fam_index',
+      relname: 'pg_class_relname_nsp_index',
       relpages: 6,
     },
   ])
diff --git a/postgres-pglite b/postgres-pglite
index 01792c31a..0dcbc4475 160000
--- a/postgres-pglite
+++ b/postgres-pglite
@@ -1 +1 @@
-Subproject commit 01792c31a62b7045eb22e93d7dad022bb64b1184
+Subproject commit 0dcbc4475254b83342509aad6ea32dc60e27350c