diff --git a/controller/store/sql/postgresql/019_v0_4_26_permission_model.sql b/controller/store/sql/postgresql/019_v0_4_26_permission_model.sql
new file mode 100644
index 00000000..af8dcac6
--- /dev/null
+++ b/controller/store/sql/postgresql/019_v0_4_26_permission_model.sql
@@ -0,0 +1,14 @@
+-- +migrate Up
+
+create type permission_mode_type as enum('open', 'closed');
+
+alter table shares add column permission_mode permission_mode_type not null default('open');
+
+create table access_grants (
+    id                  serial                  primary key,
+    share_id            integer                 references shares(id),
+    account_id          integer                 references accounts(id),
+    created_at          timestamptz             not null default(current_timestamp),
+    updated_at          timestamptz             not null default(current_timestamp),
+    deleted             boolean                 not null default(false)
+);
\ No newline at end of file
diff --git a/controller/store/sql/sqlite3/019_v0_4_26_permission_model.sql b/controller/store/sql/sqlite3/019_v0_4_26_permission_model.sql
new file mode 100644
index 00000000..102618c9
--- /dev/null
+++ b/controller/store/sql/sqlite3/019_v0_4_26_permission_model.sql
@@ -0,0 +1,12 @@
+-- +migrate Up
+
+alter table shares add column permission_mode string not null default('open');
+
+create table access_grants (
+    id                  serial                  primary key,
+    share_id            integer                 references shares(id),
+    account_id          integer                 references accounts(id),
+    created_at          datetime                not null default(strftime('%Y-%m-%d %H:%M:%f', 'now')),
+    updated_at          datetime                not null default(strftime('%Y-%m-%d %H:%M:%f', 'now')),
+    deleted             boolean                 not null default(false)
+);
\ No newline at end of file