diff --git a/src/event.rs b/src/event.rs
index 4e4d5d3..cd0d3ad 100644
--- a/src/event.rs
+++ b/src/event.rs
@@ -42,6 +42,12 @@ pub enum MergeRequestAction {
     Opened,
     #[serde(rename = "close")]
     Closed,
+    #[serde(rename = "reopen")]
+    Reopened,
+    #[serde(rename = "approved")]
+    Approved,
+    #[serde(rename = "unapproved")]
+    Unapproved,
     #[serde(rename = "merge")]
     Merged,
     #[serde(other)]
@@ -53,6 +59,9 @@ impl MergeRequestAction {
         match self {
             MergeRequestAction::Opened => "opened",
             MergeRequestAction::Closed => "closed",
+            MergeRequestAction::Reopened => "reopened",
+            MergeRequestAction::Approved => "approved",
+            MergeRequestAction::Unapproved => "unapproved",
             MergeRequestAction::Merged => "merged",
             MergeRequestAction::Other => "other",
         }