diff --git a/CHANGES_NEXT_RELEASE b/CHANGES_NEXT_RELEASE
index 9f08b77..6f28b02 100644
--- a/CHANGES_NEXT_RELEASE
+++ b/CHANGES_NEXT_RELEASE
@@ -1 +1,2 @@
+- Upgrade to use Esper 8.8 from Esper 8.4
 - Remove: RPM package stuff
diff --git a/perseo-main/pom.xml b/perseo-main/pom.xml
index e8cf2d7..4891c6b 100644
--- a/perseo-main/pom.xml
+++ b/perseo-main/pom.xml
@@ -69,17 +69,17 @@
         <dependency>
             <groupId>com.espertech</groupId>
             <artifactId>esper-runtime</artifactId>
-            <version>8.4.0</version>
+            <version>8.8.0</version>
         </dependency>
         <dependency>
             <groupId>com.espertech</groupId>
             <artifactId>esper-common</artifactId>
-            <version>8.4.0</version>
+            <version>8.8.0</version>
         </dependency>
         <dependency>
             <groupId>com.espertech</groupId>
             <artifactId>esper-compiler</artifactId>
-            <version>8.4.0</version>
+            <version>8.8.0</version>
         </dependency>
         <dependency>
             <groupId>com.espertech</groupId>
diff --git a/perseo-main/src/test/java/com/telefonica/iot/perseo/test/EventBeanMock.java b/perseo-main/src/test/java/com/telefonica/iot/perseo/test/EventBeanMock.java
index df74e21..3f717a7 100644
--- a/perseo-main/src/test/java/com/telefonica/iot/perseo/test/EventBeanMock.java
+++ b/perseo-main/src/test/java/com/telefonica/iot/perseo/test/EventBeanMock.java
@@ -27,9 +27,8 @@
 import com.espertech.esper.common.client.EventType;
 import com.espertech.esper.common.client.FragmentEventType;
 import com.espertech.esper.common.client.PropertyAccessException;
-// To be used with Esper 8.7
-// import com.espertech.esper.common.client.type.EPTypeClass;
-// import com.espertech.esper.common.client.type.EPType;
+import com.espertech.esper.common.client.type.EPTypeClass;
+import com.espertech.esper.common.client.type.EPType;
 import java.util.Iterator;
 import java.util.Map;
 
@@ -132,16 +131,15 @@ public java.util.Set<EventType> getDeepSuperTypesAsSet(){
             throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
         }
 
-        // To be used with Esper 8.7
-        // @Override
-        // public EPTypeClass getUnderlyingEPType() {
-        //     throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
-        // }
+        @Override
+        public EPTypeClass getUnderlyingEPType() {
+            throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+        }
 
-        // @Override
-        // public EPType getPropertyEPType(java.lang.String string) {
-        //     throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
-        // }
+        @Override
+        public EPType getPropertyEPType(java.lang.String string) {
+            throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+        }
         };
 
     @Override