diff --git a/src/main/java/org/gitlab4j/api/Constants.java b/src/main/java/org/gitlab4j/api/Constants.java
index 7a1c7ea4eabb86639dee9fb1540fb601bb53135e..c2c6d84f2c41bc5216e84bd07ae6381cec97042e 100644
--- a/src/main/java/org/gitlab4j/api/Constants.java
+++ b/src/main/java/org/gitlab4j/api/Constants.java
@@ -463,7 +463,7 @@ public interface Constants {
     /** Enum to use for specifying the event action_type. */
     public enum ActionType {
 
-        CREATED, UPDATED, CLOSED, REOPENED, PUSHED, COMMENTED, MERGED, JOINED, LEFT, DESTROYED, EXPIRED, REMOVED;
+        CREATED, UPDATED, OPENED, CLOSED, REOPENED, PUSHED, COMMENTED, MERGED, JOINED, LEFT, DESTROYED, EXPIRED, REMOVED, DELETED, APPROVED, ACCEPTED;
 
         private static JacksonJsonEnumHelper<ActionType> enumHelper = new JacksonJsonEnumHelper<>(ActionType.class);