diff --git a/libs/walproposer/src/walproposer.rs b/libs/walproposer/src/walproposer.rs
index 7251545792..8ab8fb1a07 100644
--- a/libs/walproposer/src/walproposer.rs
+++ b/libs/walproposer/src/walproposer.rs
@@ -453,9 +453,12 @@ mod tests {
                 event_mask: 0,
             }),
             expected_messages: vec![
-                // Greeting(ProposerGreeting { protocol_version: 2, pg_version: 160001, proposer_id: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], system_id: 0, timeline_id: 9e4c8f36063c6c6e93bc20d65a820f3d, tenant_id: 9e4c8f36063c6c6e93bc20d65a820f3d, tli: 1, wal_seg_size: 16777216 })
+                // TODO: When updating Postgres versions, this test will cause
+                // problems. Postgres version in message needs updating.
+                //
+                // Greeting(ProposerGreeting { protocol_version: 2, pg_version: 160002, proposer_id: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], system_id: 0, timeline_id: 9e4c8f36063c6c6e93bc20d65a820f3d, tenant_id: 9e4c8f36063c6c6e93bc20d65a820f3d, tli: 1, wal_seg_size: 16777216 })
                 vec![
-                    103, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 1, 113, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+                    103, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 2, 113, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
                     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 158, 76, 143, 54, 6, 60, 108, 110,
                     147, 188, 32, 214, 90, 130, 15, 61, 158, 76, 143, 54, 6, 60, 108, 110, 147,
                     188, 32, 214, 90, 130, 15, 61, 1, 0, 0, 0, 0, 0, 0, 1,
diff --git a/vendor/postgres-v16 b/vendor/postgres-v16
index f7ea954989..550cdd26d4 160000
--- a/vendor/postgres-v16
+++ b/vendor/postgres-v16
@@ -1 +1 @@
-Subproject commit f7ea954989a2e7901f858779cff55259f203479a
+Subproject commit 550cdd26d445afdd26b15aa93c8c2f3dc52f8361
diff --git a/vendor/revisions.json b/vendor/revisions.json
index c7076231e5..91ebb8cb34 100644
--- a/vendor/revisions.json
+++ b/vendor/revisions.json
@@ -1,5 +1,5 @@
 {
-    "postgres-v16": "f7ea954989a2e7901f858779cff55259f203479a",
+    "postgres-v16": "550cdd26d445afdd26b15aa93c8c2f3dc52f8361",
     "postgres-v15": "6ee78a3c29e33cafd85ba09568b6b5eb031d29b9",
     "postgres-v14": "018fb052011081dc2733d3118d12e5c36df6eba1"
 }