diff --git a/package.json b/package.json
index 8093893..b92d295 100644
--- a/package.json
+++ b/package.json
@@ -33,7 +33,7 @@
     "builder-victory-component": "^5.1.2",
     "d3-shape": "^1.0.0",
     "lodash": "^4.17.4",
-    "victory-core": "^20.4.0"
+    "victory-core": "^20.6.0"
   },
   "devDependencies": {
     "@kadira/storybook": "^1.25.0",
diff --git a/src/components/victory-pie.js b/src/components/victory-pie.js
index 6e799b5..217751d 100644
--- a/src/components/victory-pie.js
+++ b/src/components/victory-pie.js
@@ -79,6 +79,23 @@ class VictoryPie extends React.Component {
       ]),
       eventHandlers: PropTypes.object
     })),
+    externalEventMutations: PropTypes.arrayOf(PropTypes.shape({
+      callback: PropTypes.function,
+      childName: PropTypes.oneOfType([
+        PropTypes.string,
+        PropTypes.array
+      ]),
+      eventKey: PropTypes.oneOfType([
+        PropTypes.array,
+        CustomPropTypes.allOfType([CustomPropTypes.integer, CustomPropTypes.nonNegative]),
+        PropTypes.string
+      ]),
+      mutation: PropTypes.function,
+      target: PropTypes.oneOfType([
+        PropTypes.string,
+        PropTypes.array
+      ])
+    })),
     groupComponent: PropTypes.element,
     height: CustomPropTypes.nonNegative,
     innerRadius: CustomPropTypes.nonNegative,