diff --git a/pkgs/servers/sql/postgresql/ext/pg_cron.nix b/pkgs/servers/sql/postgresql/ext/pg_cron.nix
index ef019030ddb1..bb5dca058bfe 100644
--- a/pkgs/servers/sql/postgresql/ext/pg_cron.nix
+++ b/pkgs/servers/sql/postgresql/ext/pg_cron.nix
@@ -7,22 +7,16 @@
 
 postgresqlBuildExtension (finalAttrs: {
   pname = "pg_cron";
-  version = "1.6.5";
+  version = "1.6.6";
 
   src = fetchFromGitHub {
     owner = "citusdata";
     repo = "pg_cron";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-Llksil7Fk7jvJJmCpfCN0Qm2b2I4J1VOA7/ibytO+KM=";
+    hash = "sha256-N6lLmfegUeHCpwXztMifTRvajlVLyxL0j+8edouKIOQ=";
   };
 
   meta = {
-    # PostgreSQL 18 support issue upstream: https://github.com/citusdata/pg_cron/issues/396
-    # Note: already fixed on `main` branch.
-    # Check after next package update.
-    broken = lib.warnIf (
-      finalAttrs.version != "1.6.5"
-    ) "Is postgresql18Packages.pg_cron still broken?" (lib.versionAtLeast postgresql.version "18");
     description = "Run Cron jobs through PostgreSQL";
     homepage = "https://github.com/citusdata/pg_cron";
     changelog = "https://github.com/citusdata/pg_cron/releases/tag/v${finalAttrs.version}";