diff --git a/irc/caps/constants.go b/irc/caps/constants.go
index c43b84be..ea004ea1 100644
--- a/irc/caps/constants.go
+++ b/irc/caps/constants.go
@@ -1,4 +1,6 @@
-// Package caps holds capabilities.
+// Copyright (c) 2017 Daniel Oaks <daniel@danieloaks.net>
+// released under the MIT license
+
 package caps
 
 // Capability represents an optional feature that a client may request from the server.
diff --git a/irc/caps/set.go b/irc/caps/set.go
index c5ad4207..f18852bd 100644
--- a/irc/caps/set.go
+++ b/irc/caps/set.go
@@ -1,4 +1,6 @@
-// Package caps holds capabilities.
+// Copyright (c) 2017 Daniel Oaks <daniel@danieloaks.net>
+// released under the MIT license
+
 package caps
 
 import (
diff --git a/irc/caps/values.go b/irc/caps/values.go
index e8fb9979..b274f35f 100644
--- a/irc/caps/values.go
+++ b/irc/caps/values.go
@@ -1,3 +1,6 @@
+// Copyright (c) 2017 Daniel Oaks <daniel@danieloaks.net>
+// released under the MIT license
+
 package caps
 
 import "sync"
diff --git a/irc/caps/version.go b/irc/caps/version.go
index b718f2fa..96c610f1 100644
--- a/irc/caps/version.go
+++ b/irc/caps/version.go
@@ -1,3 +1,6 @@
+// Copyright (c) 2017 Daniel Oaks <daniel@danieloaks.net>
+// released under the MIT license
+
 package caps
 
 // Version is used to select which max version of CAP the client supports.
diff --git a/irc/sno/constants.go b/irc/sno/constants.go
index 16a3aa55..697348a9 100644
--- a/irc/sno/constants.go
+++ b/irc/sno/constants.go
@@ -1,3 +1,6 @@
+// Copyright (c) 2017 Daniel Oaks <daniel@danieloaks.net>
+// released under the MIT license
+
 // Package sno holds Server Notice masks for easy reference.
 package sno