diff --git a/native/v8_extensions/onig_scanner.mm b/native/v8_extensions/onig_scanner.mm
index 082a166b2..007626db9 100644
--- a/native/v8_extensions/onig_scanner.mm
+++ b/native/v8_extensions/onig_scanner.mm
@@ -23,6 +23,9 @@ class OnigScannerUserData : public CefBase {
   }
   
   ~OnigScannerUserData() {
+    for (vector<OnigRegexp *>::iterator iter = regExps.begin(); iter < regExps.end(); iter++) {
+      [*iter release];
+    }
   }
   
   CefRefPtr<CefV8Value> CaptureIndicesForMatch(OnigResult *result) {