diff --git a/core-java-modules/core-java-15/pom.xml b/core-java-modules/core-java-15/pom.xml
index c6f1454078..df8aeafca9 100644
--- a/core-java-modules/core-java-15/pom.xml
+++ b/core-java-modules/core-java-15/pom.xml
@@ -51,8 +51,8 @@
                 <configuration>
                     <release>${maven.compiler.release}</release>
                     <compilerArgs>--enable-preview</compilerArgs>
-                    <source>15</source>
-                    <target>15</target>
+                    <source>14</source>
+                    <target>14</target>
                 </configuration>
             </plugin>
             <plugin>
diff --git a/core-java-modules/core-java-15/src/main/java/whatsnew/records/Person.java b/core-java-modules/core-java-15/src/main/java/com/baeldung/whatsnew/records/Person.java
similarity index 88%
rename from core-java-modules/core-java-15/src/main/java/whatsnew/records/Person.java
rename to core-java-modules/core-java-15/src/main/java/com/baeldung/whatsnew/records/Person.java
index 9d668b1f85..e59fa86ed6 100644
--- a/core-java-modules/core-java-15/src/main/java/whatsnew/records/Person.java
+++ b/core-java-modules/core-java-15/src/main/java/com/baeldung/whatsnew/records/Person.java
@@ -1,4 +1,4 @@
-package whatsnew.records;
+package com.baeldung.whatsnew.records;
 
 /**
  * Java record with a header indicating 2 fields.
diff --git a/core-java-modules/core-java-15/src/main/java/whatsnew/sealedclasses/Employee.java b/core-java-modules/core-java-15/src/main/java/com/baeldung/whatsnew/sealedclasses/Employee.java
similarity index 76%
rename from core-java-modules/core-java-15/src/main/java/whatsnew/sealedclasses/Employee.java
rename to core-java-modules/core-java-15/src/main/java/com/baeldung/whatsnew/sealedclasses/Employee.java
index 72c73a4312..e9a2e25417 100644
--- a/core-java-modules/core-java-15/src/main/java/whatsnew/sealedclasses/Employee.java
+++ b/core-java-modules/core-java-15/src/main/java/com/baeldung/whatsnew/sealedclasses/Employee.java
@@ -1,4 +1,4 @@
-package whatsnew.sealedclasses;
+package com.baeldung.whatsnew.sealedclasses;
 
 import java.util.Date;
 
diff --git a/core-java-modules/core-java-15/src/main/java/whatsnew/sealedclasses/Manager.java b/core-java-modules/core-java-15/src/main/java/com/baeldung/whatsnew/sealedclasses/Manager.java
similarity index 51%
rename from core-java-modules/core-java-15/src/main/java/whatsnew/sealedclasses/Manager.java
rename to core-java-modules/core-java-15/src/main/java/com/baeldung/whatsnew/sealedclasses/Manager.java
index 043a37182a..79c50b057e 100644
--- a/core-java-modules/core-java-15/src/main/java/whatsnew/sealedclasses/Manager.java
+++ b/core-java-modules/core-java-15/src/main/java/com/baeldung/whatsnew/sealedclasses/Manager.java
@@ -1,4 +1,4 @@
-package whatsnew.sealedclasses;
+package com.baeldung.whatsnew.sealedclasses;
 
 public final class Manager extends Person {
 }
diff --git a/core-java-modules/core-java-15/src/main/java/whatsnew/sealedclasses/Person.java b/core-java-modules/core-java-15/src/main/java/com/baeldung/whatsnew/sealedclasses/Person.java
similarity index 92%
rename from core-java-modules/core-java-15/src/main/java/whatsnew/sealedclasses/Person.java
rename to core-java-modules/core-java-15/src/main/java/com/baeldung/whatsnew/sealedclasses/Person.java
index a5fca45772..d4beb64867 100644
--- a/core-java-modules/core-java-15/src/main/java/whatsnew/sealedclasses/Person.java
+++ b/core-java-modules/core-java-15/src/main/java/com/baeldung/whatsnew/sealedclasses/Person.java
@@ -1,4 +1,4 @@
-package whatsnew.sealedclasses;
+package com.baeldung.whatsnew.sealedclasses;
 
 import java.util.Date;