diff --git a/.github/workflows/maven-publish.yml b/.github/workflows/maven-publish.yml
index dab69fe..6e43a15 100644
--- a/.github/workflows/maven-publish.yml
+++ b/.github/workflows/maven-publish.yml
@@ -17,10 +17,10 @@ jobs:
 
     steps:
     - uses: actions/checkout@v3
-    - name: Set up JDK 11
+    - name: Set up JDK 21
       uses: actions/setup-java@v3
       with:
-        java-version: '11'
+        java-version: '21'
         distribution: 'temurin'
         server-id: github # Value of the distributionManagement/repository/id field of the pom.xml
         settings-path: ${{ github.workspace }} # location for the settings.xml file
diff --git a/pom.xml b/pom.xml
index 07aaad6..23f1383 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,20 +6,20 @@
 
     <groupId>org.springframework</groupId>
     <artifactId>fake-test</artifactId>
-    <version>1.0.3</version>
+    <version>1.0.4</version>
     <packaging>jar</packaging>
 
     <properties>
-        <maven.compiler.source>17</maven.compiler.source>
-        <maven.compiler.target>17</maven.compiler.target>
+        <maven.compiler.source>21</maven.compiler.source>
+        <maven.compiler.target>21</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
 
     <dependencies>
         <dependency>
-            <groupId>jakarta.persistence</groupId>
-            <artifactId>jakarta.persistence-api</artifactId>
-            <version>3.1.0</version>
+            <groupId>javax.persistence</groupId>
+            <artifactId>javax.persistence-api</artifactId>
+            <version>2.2</version>
         </dependency>
         <dependency>
             <groupId>org.springframework.data</groupId>
@@ -59,8 +59,8 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.8.1</version>
                 <configuration>
-                    <source>17</source>
-                    <target>17</target>
+                    <source>21</source>
+                    <target>21</target>
                 </configuration>
             </plugin>
             <plugin>
diff --git a/src/main/java/org/springframework/test/fake/CrudRepositoryFake.java b/src/main/java/org/springframework/test/fake/CrudRepositoryFake.java
index 95f4246..a7517ba 100644
--- a/src/main/java/org/springframework/test/fake/CrudRepositoryFake.java
+++ b/src/main/java/org/springframework/test/fake/CrudRepositoryFake.java
@@ -1,11 +1,7 @@
 package org.springframework.test.fake;
 
-import jakarta.persistence.Entity;
-import jakarta.persistence.Id;
+import javax.persistence.Id;
 import org.springframework.data.repository.CrudRepository;
-
-import java.lang.annotation.Annotation;
-import java.lang.reflect.Field;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Optional;
diff --git a/src/test/java/org/springframework/test/fake/Message.java b/src/test/java/org/springframework/test/fake/Message.java
index 488aac3..d36d9e6 100644
--- a/src/test/java/org/springframework/test/fake/Message.java
+++ b/src/test/java/org/springframework/test/fake/Message.java
@@ -2,10 +2,10 @@
 
 import java.util.Objects;
 
-import jakarta.persistence.Entity;
-import jakarta.persistence.GeneratedValue;
-import jakarta.persistence.GenerationType;
-import jakarta.persistence.Id;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
 
 @Entity
 public class Message {