diff --git a/demo-12/rds.tf b/demo-12/rds.tf
index 9aee3c6..15fbd4c 100644
--- a/demo-12/rds.tf
+++ b/demo-12/rds.tf
@@ -6,7 +6,7 @@ resource "aws_db_subnet_group" "mariadb-subnet" {
 
 resource "aws_db_parameter_group" "mariadb-parameters" {
   name        = "mariadb-parameters"
-  family      = "mariadb10.1"
+  family      = "mariadb10.4"
   description = "MariaDB parameter group"
 
   parameter {
@@ -18,7 +18,7 @@ resource "aws_db_parameter_group" "mariadb-parameters" {
 resource "aws_db_instance" "mariadb" {
   allocated_storage       = 100 # 100 GB of storage, gives us more IOPS than a lower number
   engine                  = "mariadb"
-  engine_version          = "10.1.14"
+  engine_version          = "10.4.13"
   instance_class          = "db.t2.small" # use micro if you want to use the free tier
   identifier              = "mariadb"
   name                    = "mariadb"
diff --git a/demo-17/rds.tf b/demo-17/rds.tf
index a98519c..909c2cb 100644
--- a/demo-17/rds.tf
+++ b/demo-17/rds.tf
@@ -6,7 +6,7 @@ resource "aws_db_subnet_group" "mariadb-subnet" {
 
 resource "aws_db_parameter_group" "mariadb-parameters" {
   name        = "mariadb-params"
-  family      = "mariadb10.1"
+  family      = "mariadb10.4"
   description = "MariaDB parameter group"
 
   parameter {
@@ -18,7 +18,7 @@ resource "aws_db_parameter_group" "mariadb-parameters" {
 resource "aws_db_instance" "mariadb" {
   allocated_storage         = 100 # 100 GB of storage, gives us more IOPS than a lower number
   engine                    = "mariadb"
-  engine_version            = "10.1.14"
+  engine_version            = "10.4.13"
   instance_class            = "db.t2.small" # use micro if you want to use the free tier
   identifier                = "mariadb"
   name                      = "mydatabase"     # database name