diff --git a/2021-02/spring-30/spring-30-exercise/pom.xml b/2021-02/spring-30/spring-30-exercise/pom.xml
index 0c527020..6c20e937 100644
--- a/2021-02/spring-30/spring-30-exercise/pom.xml
+++ b/2021-02/spring-30/spring-30-exercise/pom.xml
@@ -10,8 +10,9 @@
 
     <parent>
         <groupId>org.springframework.boot</groupId>
-        <artifac5Id>spring-boot-starter-parent</artifac5Id>
+        <artifactId>spring-boot-starter-parent</artifactId>
         <version>2.5.1</version>
+        <relativePath/>
     </parent>
 
     <properties>
@@ -29,8 +30,7 @@
         </dependency>
         <dependency>
             <groupId>org.springframework.data</groupId>
-            <artifactId>spring-data-rest-hal-browser</artifactId>
-            <version>3.1.0.RELEASE</version>
+            <artifactId>spring-data-rest-hal-explorer</artifactId>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
diff --git a/2021-02/spring-30/spring-30-solution/pom.xml b/2021-02/spring-30/spring-30-solution/pom.xml
index 6e7d52d8..bea3750d 100644
--- a/2021-02/spring-30/spring-30-solution/pom.xml
+++ b/2021-02/spring-30/spring-30-solution/pom.xml
@@ -12,6 +12,7 @@
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
         <version>2.5.1</version>
+        <relativePath/>
     </parent>
 
     <properties>
@@ -29,8 +30,7 @@
         </dependency>
         <dependency>
             <groupId>org.springframework.data</groupId>
-            <artifactId>spring-data-rest-hal-browser</artifactId>
-            <version>3.1.0.RELEASE</version>
+            <artifactId>spring-data-rest-hal-explorer</artifactId>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>