diff --git a/pkgs/servers/sql/postgresql/ext/pg_net.nix b/pkgs/servers/sql/postgresql/ext/pg_net.nix
index b3d24025c2b9..c754b7104f43 100644
--- a/pkgs/servers/sql/postgresql/ext/pg_net.nix
+++ b/pkgs/servers/sql/postgresql/ext/pg_net.nix
@@ -8,18 +8,20 @@
 
 postgresqlBuildExtension (finalAttrs: {
   pname = "pg_net";
-  version = "0.16.0";
+  version = "0.18.0";
 
   src = fetchFromGitHub {
     owner = "supabase";
     repo = "pg_net";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-Jtb4jGvci70Yb6YoEsr8sSHz30kFeYFitnLjtJK1CGI=";
+    hash = "sha256-MXZewz6vb1ZEGMzbk/x0VtBDH2GxnwYWsy3EjJnas2U=";
   };
 
   buildInputs = [ curl ];
 
-  env.NIX_CFLAGS_COMPILE = "-Wno-error";
+  env.NIX_CFLAGS_COMPILE = toString (
+    lib.optional (lib.versionAtLeast postgresql.version "18") "-Wno-error=missing-variable-declarations"
+  );
 
   meta = {
     description = "Async networking for Postgres";