diff --git a/src/dgram.cpp b/src/dgram.cpp
index d23fe963..39493d6b 100644
--- a/src/dgram.cpp
+++ b/src/dgram.cpp
@@ -1,5 +1,5 @@
 /*
-    Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
+    Copyright (c) 2016 Contributors as noted in the AUTHORS file
 
     This file is part of libzmq, the ZeroMQ core engine in C++.
 
diff --git a/src/dgram.hpp b/src/dgram.hpp
index 85716f06..78063e04 100644
--- a/src/dgram.hpp
+++ b/src/dgram.hpp
@@ -1,5 +1,5 @@
 /*
-    Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
+    Copyright (c) 2016 Contributors as noted in the AUTHORS file
 
     This file is part of libzmq, the ZeroMQ core engine in C++.
 
diff --git a/tests/test_dgram.cpp b/tests/test_dgram.cpp
index bbd38c7a..aecba51b 100644
--- a/tests/test_dgram.cpp
+++ b/tests/test_dgram.cpp
@@ -1,5 +1,5 @@
 /*
-    Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
+    Copyright (c) 2016 Contributors as noted in the AUTHORS file
 
     This file is part of libzmq, the ZeroMQ core engine in C++.