diff --git a/src/main/resources/db/changelog/changes/add-default-cars-to-cars-table.yaml b/src/main/resources/db/changelog/changes/add-default-cars-to-cars-table.yaml
new file mode 100644
index 0000000..d1927d2
--- /dev/null
+++ b/src/main/resources/db/changelog/changes/add-default-cars-to-cars-table.yaml
@@ -0,0 +1,115 @@
+databaseChangeLog:
+  - changeSet:
+      id: insert-car-1
+      author: Dmytro Varukha
+      changes:
+        - insert:
+            tableName: cars
+            columns:
+              - column:
+                  name: model
+                  value: "Toyota Corolla"
+              - column:
+                  name: brand
+                  value: "Toyota"
+              - column:
+                  name: inventory
+                  value: 10
+              - column:
+                  name: car_type
+                  value: "SEDAN"
+              - column:
+                  name: daily_fee
+                  value: 50.00
+
+  - changeSet:
+      id: insert-car-2
+      author: Dmytro Varukha
+      changes:
+        - insert:
+            tableName: cars
+            columns:
+              - column:
+                  name: model
+                  value: "Honda Civic"
+              - column:
+                  name: brand
+                  value: "Honda"
+              - column:
+                  name: inventory
+                  value: 8
+              - column:
+                  name: car_type
+                  value: "SEDAN"
+              - column:
+                  name: daily_fee
+                  value: 45.00
+
+  - changeSet:
+      id: insert-car-3
+      author: Dmytro Varukha
+      changes:
+        - insert:
+            tableName: cars
+            columns:
+              - column:
+                  name: model
+                  value: "Ford Mustang"
+              - column:
+                  name: brand
+                  value: "Ford"
+              - column:
+                  name: inventory
+                  value: 5
+              - column:
+                  name: car_type
+                  value: "UNIVERSAL"
+              - column:
+                  name: daily_fee
+                  value: 80.00
+
+  - changeSet:
+      id: insert-car-4
+      author: Dmytro Varukha
+      changes:
+        - insert:
+            tableName: cars
+            columns:
+              - column:
+                  name: model
+                  value: "Volkswagen Golf"
+              - column:
+                  name: brand
+                  value: "Volkswagen"
+              - column:
+                  name: inventory
+                  value: 7
+              - column:
+                  name: car_type
+                  value: "HATCHBACK"
+              - column:
+                  name: daily_fee
+                  value: 55.00
+
+  - changeSet:
+      id: insert-car-5
+      author: Dmytro Varukha
+      changes:
+        - insert:
+            tableName: cars
+            columns:
+              - column:
+                  name: model
+                  value: "Chevrolet Tahoe"
+              - column:
+                  name: brand
+                  value: "Chevrolet"
+              - column:
+                  name: inventory
+                  value: 4
+              - column:
+                  name: car_type
+                  value: "SUV"
+              - column:
+                  name: daily_fee
+                  value: 70.00
diff --git a/src/main/resources/db/changelog/changes/add-default-rentals-to-rentals-table.yaml b/src/main/resources/db/changelog/changes/add-default-rentals-to-rentals-table.yaml
new file mode 100644
index 0000000..492eec0
--- /dev/null
+++ b/src/main/resources/db/changelog/changes/add-default-rentals-to-rentals-table.yaml
@@ -0,0 +1,60 @@
+databaseChangeLog:
+  - changeSet:
+      id: insert-rental-1
+      author: Dmytro Varukha
+      changes:
+        - insert:
+            tableName: rentals
+            columns:
+              - column:
+                  name: rental_date
+                  value: "2023-10-15 09:00:00"
+              - column:
+                  name: return_date
+                  value: "2023-10-18 15:00:00"
+              - column:
+                  name: car_id
+                  value: 1
+              - column:
+                  name: user_id
+                  value: 1
+
+  - changeSet:
+      id: insert-rental-2
+      author: Dmytro Varukha
+      changes:
+        - insert:
+            tableName: rentals
+            columns:
+              - column:
+                  name: rental_date
+                  value: "2023-10-20 11:30:00"
+              - column:
+                  name: return_date
+                  value: "2023-10-25 10:15:00"
+              - column:
+                  name: car_id
+                  value: 2
+              - column:
+                  name: user_id
+                  value: 2
+
+  - changeSet:
+      id: insert-rental-3
+      author: Dmytro Varukha
+      changes:
+        - insert:
+            tableName: rentals
+            columns:
+              - column:
+                  name: rental_date
+                  value: "2023-10-12 14:45:00"
+              - column:
+                  name: return_date
+                  value: "2023-10-16 16:30:00"
+              - column:
+                  name: car_id
+                  value: 3
+              - column:
+                  name: user_id
+                  value: 3
diff --git a/src/main/resources/db/changelog/changes/add-default-users-to-users-table.yaml b/src/main/resources/db/changelog/changes/add-default-users-to-users-table.yaml
new file mode 100644
index 0000000..75ceb75
--- /dev/null
+++ b/src/main/resources/db/changelog/changes/add-default-users-to-users-table.yaml
@@ -0,0 +1,69 @@
+databaseChangeLog:
+  - changeSet:
+      id: insert-user-1
+      author: Dmytro Varukha
+      changes:
+        - insert:
+            tableName: users
+            columns:
+              - column:
+                  name: email
+                  value: user1@example.com
+              - column:
+                  name: first_name
+                  value: John
+              - column:
+                  name: last_name
+                  value: Doe
+              - column:
+                  name: password
+                  value: password1
+              - column:
+                  name: telegram_chat_id
+                  value: 1234567
+
+  - changeSet:
+      id: insert-user-2
+      author: Dmytro Varukha
+      changes:
+        - insert:
+            tableName: users
+            columns:
+              - column:
+                  name: email
+                  value: user2@example.com
+              - column:
+                  name: first_name
+                  value: Jane
+              - column:
+                  name: last_name
+                  value: Smith
+              - column:
+                  name: password
+                  value: password2
+              - column:
+                  name: telegram_chat_id
+                  value: 9876543
+
+  - changeSet:
+      id: insert-user-3
+      author: Dmytro Varukha
+      changes:
+        - insert:
+            tableName: users
+            columns:
+              - column:
+                  name: email
+                  value: user3@example.com
+              - column:
+                  name: first_name
+                  value: Alice
+              - column:
+                  name: last_name
+                  value: Johnson
+              - column:
+                  name: password
+                  value: password3
+              - column:
+                  name: telegram_chat_id
+                  value: 5555555
diff --git a/src/main/resources/db/changelog/db.changelog-master.yaml b/src/main/resources/db/changelog/db.changelog-master.yaml
index 49fe811..e538309 100644
--- a/src/main/resources/db/changelog/db.changelog-master.yaml
+++ b/src/main/resources/db/changelog/db.changelog-master.yaml
@@ -11,3 +11,9 @@ databaseChangeLog:
       file: db/changelog/changes/create-rentals-table.yaml
   - include:
       file: db/changelog/changes/create-payments-table.yaml
+  - include:
+      file: db/changelog/changes/add-default-cars-to-cars-table.yaml
+  - include:
+      file: db/changelog/changes/add-default-users-to-users-table.yaml
+  - include:
+      file: db/changelog/changes/add-default-rentals-to-rentals-table.yaml