diff --git a/pom.xml b/pom.xml
index ae6d38f..db2352e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -328,7 +328,7 @@
             <version>1.9.3</version>
         </dependency>
         <dependency>
-            <groupId>org.hibernate</groupId>
+            <groupId>org.hibernate.validator</groupId>
             <artifactId>hibernate-validator</artifactId>
             <version>6.0.5.Final</version>
         </dependency>
diff --git a/src/main/java/net/media/openrtb25/request/Pmp.java b/src/main/java/net/media/openrtb25/request/Pmp.java
index 5aa8657..3f44762 100644
--- a/src/main/java/net/media/openrtb25/request/Pmp.java
+++ b/src/main/java/net/media/openrtb25/request/Pmp.java
@@ -53,7 +53,7 @@ public Map<String, Object> getExt() {
     return this.ext;
   }
 
-  public void setExt(Map ext) {
+  public void setExt(Map<String, Object> ext) {
     this.ext = ext;
   }