diff --git a/examples/migrations-demo/flyway-demo/pom.xml b/examples/migrations-demo/flyway-demo/pom.xml
index 4b2a13b9..1ef16525 100644
--- a/examples/migrations-demo/flyway-demo/pom.xml
+++ b/examples/migrations-demo/flyway-demo/pom.xml
@@ -11,12 +11,15 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.3.0.RELEASE</version>
+        <version>3.1.3</version>
+        <relativePath/>
     </parent>
 	
 	<properties>
-		<maven.compiler.source>11</maven.compiler.source>
-		<maven.compiler.target>11</maven.compiler.target>
+		<maven.compiler.source>17</maven.compiler.source>
+		<maven.compiler.target>17</maven.compiler.target>
+        <h2.version>2.2.220</h2.version>
+        <snakeyaml.version>2.0</snakeyaml.version>
 	</properties>
 
     <dependencies>
@@ -36,6 +39,11 @@
             <version>${h2.version}</version>
         </dependency>
 
+        <dependency>
+            <groupId>org.yaml</groupId>
+            <artifactId>snakeyaml</artifactId>
+            <version>${snakeyaml.version}</version>
+        </dependency>
 
         <dependency>
             <groupId>org.flywaydb</groupId>
diff --git a/examples/migrations-demo/flyway-demo/src/main/java/db/migration/AddUsersToCoursesReferenceTable.java b/examples/migrations-demo/flyway-demo/src/main/java/db/migration/AddUsersToCoursesReferenceTable.java
index 5f01b132..82b16405 100644
--- a/examples/migrations-demo/flyway-demo/src/main/java/db/migration/AddUsersToCoursesReferenceTable.java
+++ b/examples/migrations-demo/flyway-demo/src/main/java/db/migration/AddUsersToCoursesReferenceTable.java
@@ -16,8 +16,13 @@ public class AddUsersToCoursesReferenceTable implements JavaMigration {
         DataSource ds = new SingleConnectionDataSource(context.getConnection(), true);
         JdbcOperations jdbc = new JdbcTemplate(ds);
 
-        jdbc.execute("create table users_courses(user_id bigint references users(id), " +
-                "course_id bigint references courses(id))");
+        jdbc.execute("""
+                CREATE TABLE users_courses (
+                    user_id bigint REFERENCES users(id),
+                    course_id bigint REFERENCES courses(id),
+                    PRIMARY KEY(user_id, course_id)
+                )
+        """);
     }
 
     @Override
@@ -35,11 +40,6 @@ public class AddUsersToCoursesReferenceTable implements JavaMigration {
         return null;
     }
 
-    @Override
-    public boolean isUndo() {
-        return false;
-    }
-
     @Override
     public boolean canExecuteInTransaction() {
         return true;
diff --git a/examples/migrations-demo/flyway-demo/src/main/java/db/migration/V3_1__2020_05_26_Add_courses_table.java b/examples/migrations-demo/flyway-demo/src/main/java/db/migration/V3_1__2020_05_26_Add_courses_table.java
index 71aab47c..7f09bf44 100644
--- a/examples/migrations-demo/flyway-demo/src/main/java/db/migration/V3_1__2020_05_26_Add_courses_table.java
+++ b/examples/migrations-demo/flyway-demo/src/main/java/db/migration/V3_1__2020_05_26_Add_courses_table.java
@@ -14,6 +14,13 @@ public class V3_1__2020_05_26_Add_courses_table extends BaseJavaMigration {
     public void migrate(Context context) throws Exception {
         DataSource ds = new SingleConnectionDataSource(context.getConnection(), true);
         JdbcOperations jdbc = new JdbcTemplate(ds);
-        jdbc.execute("create table courses(id bigserial, name varchar(255))");
+
+        jdbc.execute("""
+                create table courses (
+                    id bigserial,
+                    name varchar(255),
+                    primary key(id)
+                )
+        """);
     }
 }
diff --git a/examples/migrations-demo/flyway-demo/src/main/java/ru/otus/spring/config/AppConfig.java b/examples/migrations-demo/flyway-demo/src/main/java/ru/otus/spring/config/AppConfig.java
index 6c36acda..848c60e7 100644
--- a/examples/migrations-demo/flyway-demo/src/main/java/ru/otus/spring/config/AppConfig.java
+++ b/examples/migrations-demo/flyway-demo/src/main/java/ru/otus/spring/config/AppConfig.java
@@ -4,7 +4,7 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.DependsOn;
 import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
 
-import javax.persistence.EntityManagerFactory;
+import jakarta.persistence.EntityManagerFactory;
 import javax.sql.DataSource;
 
 public class AppConfig {
diff --git a/examples/migrations-demo/flyway-demo/src/main/resources/db/migration/1.0/V1_1__2019_01_11_Add_users_table.sql b/examples/migrations-demo/flyway-demo/src/main/resources/db/migration/1.0/V1_1__2019_01_11_Add_users_table.sql
index 1d12422d..3ab54e0c 100644
--- a/examples/migrations-demo/flyway-demo/src/main/resources/db/migration/1.0/V1_1__2019_01_11_Add_users_table.sql
+++ b/examples/migrations-demo/flyway-demo/src/main/resources/db/migration/1.0/V1_1__2019_01_11_Add_users_table.sql
@@ -1,4 +1,9 @@
 --date: 2019-01-11
 --author: ydvorzhetskiy
 
-create table users (id bigserial, login varchar(50), password varchar(50))
\ No newline at end of file
+create table users (
+    id bigserial,
+    login varchar(50),
+    password varchar(50),
+    primary key(id)
+)
\ No newline at end of file
diff --git a/examples/migrations-demo/flyway-demo/src/main/resources/db/migration/2.0/V2_2__2020_05_25_Add_emails_table.sql b/examples/migrations-demo/flyway-demo/src/main/resources/db/migration/2.0/V2_2__2020_05_25_Add_emails_table.sql
index c03d2734..ecf1827b 100644
--- a/examples/migrations-demo/flyway-demo/src/main/resources/db/migration/2.0/V2_2__2020_05_25_Add_emails_table.sql
+++ b/examples/migrations-demo/flyway-demo/src/main/resources/db/migration/2.0/V2_2__2020_05_25_Add_emails_table.sql
@@ -4,5 +4,6 @@
 create table emails (
     id bigserial,
     user_id bigint references users(id) ON DELETE CASCADE,
-    email varchar(50)
+    email varchar(50),
+    primary key(id)
 )
\ No newline at end of file
diff --git a/examples/migrations-demo/flyway-demo/src/main/resources/db/migration/data/R__0004_Add_courses.sql b/examples/migrations-demo/flyway-demo/src/main/resources/db/migration/data/R__0004_Add_courses.sql
index d8a6eafa..26305d30 100644
--- a/examples/migrations-demo/flyway-demo/src/main/resources/db/migration/data/R__0004_Add_courses.sql
+++ b/examples/migrations-demo/flyway-demo/src/main/resources/db/migration/data/R__0004_Add_courses.sql
@@ -6,5 +6,5 @@ values (1, 'Разработчик Java'),
 
 insert into users_courses (user_id, course_id)
 values (1, 1), (1, 2), (1, 3), (1, 4),
-       (2, 1), (2, 2), (1, 3),
+       (2, 1), (2, 2), (2, 3),
        (3, 3), (3, 4);
\ No newline at end of file
diff --git a/examples/migrations-demo/liquibase-demo/pom.xml b/examples/migrations-demo/liquibase-demo/pom.xml
index 74ef6864..8ebe4db8 100644
--- a/examples/migrations-demo/liquibase-demo/pom.xml
+++ b/examples/migrations-demo/liquibase-demo/pom.xml
@@ -11,12 +11,15 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.3.0.RELEASE</version>
+        <version>3.1.3</version>
+        <relativePath/>
     </parent>
 	
 	<properties>
-		<maven.compiler.source>11</maven.compiler.source>
-		<maven.compiler.target>11</maven.compiler.target>
+		<maven.compiler.source>17</maven.compiler.source>
+		<maven.compiler.target>17</maven.compiler.target>
+        <h2.version>2.2.220</h2.version>
+        <snakeyaml.version>2.0</snakeyaml.version>
 	</properties>
 
     <dependencies>
@@ -30,6 +33,12 @@
             <artifactId>spring-boot-starter-data-jpa</artifactId>
         </dependency>
 
+        <dependency>
+            <groupId>org.yaml</groupId>
+            <artifactId>snakeyaml</artifactId>
+            <version>${snakeyaml.version}</version>
+        </dependency>
+
         <dependency>
             <groupId>com.h2database</groupId>
             <artifactId>h2</artifactId>