diff --git a/util/read.cpp b/util/read.cpp
index fc88f1f..0e72f8a 100644
--- a/util/read.cpp
+++ b/util/read.cpp
@@ -11,7 +11,7 @@ class NullEventHandler : public YAML::EventHandler {
   typedef YAML::Mark Mark;
   typedef YAML::anchor_t anchor_t;
 
-  NullEventHandler() {}
+  NullEventHandler() = default;
 
   virtual void OnDocumentStart(const Mark&) {}
   virtual void OnDocumentEnd() {}
diff --git a/util/sandbox.cpp b/util/sandbox.cpp
index 1df25bb..814cf7b 100644
--- a/util/sandbox.cpp
+++ b/util/sandbox.cpp
@@ -9,7 +9,7 @@ class NullEventHandler : public YAML::EventHandler {
   typedef YAML::Mark Mark;
   typedef YAML::anchor_t anchor_t;
 
-  NullEventHandler() {}
+  NullEventHandler() = default;
 
   virtual void OnDocumentStart(const Mark&) {}
   virtual void OnDocumentEnd() {}