diff --git a/blazingcache-core/src/main/java/blazingcache/client/CacheEntry.java b/blazingcache-core/src/main/java/blazingcache/client/CacheEntry.java
index 26d1447..6c8fd09 100644
--- a/blazingcache-core/src/main/java/blazingcache/client/CacheEntry.java
+++ b/blazingcache-core/src/main/java/blazingcache/client/CacheEntry.java
@@ -143,7 +143,7 @@ public String toString() {
     }
 
     // only for tests
-    void discardInternalCachedObject() {
+    synchronized void discardInternalCachedObject() {
         reference = null;
     }
 
diff --git a/blazingcache-website/pom.xml b/blazingcache-website/pom.xml
index b2419b0..70c6a03 100644
--- a/blazingcache-website/pom.xml
+++ b/blazingcache-website/pom.xml
@@ -17,7 +17,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-site-plugin</artifactId>
-                <version>3.6</version>         
+                <version>3.7.1</version>         
             </plugin>            
             <plugin>
                 <groupId>com.github.spotbugs</groupId>
diff --git a/pom.xml b/pom.xml
index 0cc9005..ae53491 100644
--- a/pom.xml
+++ b/pom.xml
@@ -89,6 +89,14 @@
         </dependency>
     </dependencies>
     <build>
+        <pluginManagement>
+            <plugins>
+                <plugin>
+                    <artifactId>maven-site-plugin</artifactId>
+                    <version>3.7.1</version>
+                </plugin>
+            </plugins>
+        </pluginManagement>
         <plugins>
             <plugin>
                 <groupId>com.github.spotbugs</groupId>
@@ -99,7 +107,7 @@
                 <groupId>org.jacoco</groupId>
                 <artifactId>jacoco-maven-plugin</artifactId>
                 <version>${libs.jacoco}</version>
-            </plugin>
+            </plugin>            
         </plugins>
     </build>
     <profiles>