diff --git a/internal/service/rds/consts.go b/internal/service/rds/consts.go
index 9cca79e89f2..a9692c76027 100644
--- a/internal/service/rds/consts.go
+++ b/internal/service/rds/consts.go
@@ -25,6 +25,7 @@ const (
 
 const (
 	storageTypeStandard = "standard"
+	storageTypeGP3      = "gp3"
 	storageTypeGP2      = "gp2"
 	storageTypeIO1      = "io1"
 )
@@ -32,6 +33,7 @@ const (
 func StorageType_Values() []string {
 	return []string{
 		storageTypeStandard,
+		storageTypeGP3,
 		storageTypeGP2,
 		storageTypeIO1,
 	}
diff --git a/website/docs/r/db_instance.html.markdown b/website/docs/r/db_instance.html.markdown
index 5c4fa1f8104..32a5d1b9442 100644
--- a/website/docs/r/db_instance.html.markdown
+++ b/website/docs/r/db_instance.html.markdown
@@ -198,7 +198,7 @@ RDS console, e.g: rds:production-2015-06-26-06-05.
 encrypted. Note that if you are creating a cross-region read replica this field
 is ignored and you should instead declare `kms_key_id` with a valid ARN. The
 default is `false` if not specified.
-* `storage_type` - (Optional) One of "standard" (magnetic), "gp2" (general
+* `storage_type` - (Optional) One of "standard" (magnetic), "gp3" / "gp2" (general
 purpose SSD), or "io1" (provisioned IOPS SSD). The default is "io1" if `iops` is
 specified, "gp2" if not.
 * `tags` - (Optional) A map of tags to assign to the resource. If configured with a provider [`default_tags` configuration block](https://registry.terraform.io/providers/hashicorp/aws/latest/docs#default_tags-configuration-block) present, tags with matching keys will overwrite those defined at the provider-level.