diff --git a/source/tanya/async/event/epoll.d b/source/tanya/async/event/epoll.d
index ce2f15e..f0020ac 100644
--- a/source/tanya/async/event/epoll.d
+++ b/source/tanya/async/event/epoll.d
@@ -5,7 +5,7 @@
 /**
  * Event loop implementation for Linux.
  *
- * Copyright: Eugene Wissner 2016-2017.
+ * Copyright: Eugene Wissner 2016-2018.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/source/tanya/async/event/iocp.d b/source/tanya/async/event/iocp.d
index 69a49d3..9d09dcd 100644
--- a/source/tanya/async/event/iocp.d
+++ b/source/tanya/async/event/iocp.d
@@ -5,7 +5,7 @@
 /**
  * Event loop implementation for Windows.
  *
- * Copyright: Eugene Wissner 2016-2017.
+ * Copyright: Eugene Wissner 2016-2018.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/source/tanya/async/event/kqueue.d b/source/tanya/async/event/kqueue.d
index a170a15..0fb4739 100644
--- a/source/tanya/async/event/kqueue.d
+++ b/source/tanya/async/event/kqueue.d
@@ -5,7 +5,7 @@
 /*
  * Event loop implementation for *BSD.
  *
- * Copyright: Eugene Wissner 2016-2017.
+ * Copyright: Eugene Wissner 2016-2018.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/source/tanya/async/event/selector.d b/source/tanya/async/event/selector.d
index e388263..f8149cf 100644
--- a/source/tanya/async/event/selector.d
+++ b/source/tanya/async/event/selector.d
@@ -5,7 +5,7 @@
 /*
  * This module contains base implementations for reactor event loops.
  *
- * Copyright: Eugene Wissner 2016-2017.
+ * Copyright: Eugene Wissner 2016-2018.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/source/tanya/async/iocp.d b/source/tanya/async/iocp.d
index 1a72c60..2887c4a 100644
--- a/source/tanya/async/iocp.d
+++ b/source/tanya/async/iocp.d
@@ -7,7 +7,7 @@
  *
  * Note: Available only on Windows.
  *
- * Copyright: Eugene Wissner 2016-2017.
+ * Copyright: Eugene Wissner 2016-2018.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
@@ -53,4 +53,4 @@ class State
 
     /// For keeping events or event masks.
     int event;
-}
\ No newline at end of file
+}
diff --git a/source/tanya/async/loop.d b/source/tanya/async/loop.d
index 5f78183..a87eab3 100644
--- a/source/tanya/async/loop.d
+++ b/source/tanya/async/loop.d
@@ -60,7 +60,7 @@
  * }
  * ---
  *
- * Copyright: Eugene Wissner 2016-2017.
+ * Copyright: Eugene Wissner 2016-2018.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
@@ -70,8 +70,6 @@
 module tanya.async.loop;
 
 import core.time;
-import std.algorithm.iteration;
-import std.algorithm.mutation;
 import std.typecons;
 import tanya.async.transport;
 import tanya.async.watcher;
diff --git a/source/tanya/async/package.d b/source/tanya/async/package.d
index 9958f66..140206e 100644
--- a/source/tanya/async/package.d
+++ b/source/tanya/async/package.d
@@ -5,7 +5,7 @@
 /**
  * This package provides asynchronous capabilities.
  *
- * Copyright: Eugene Wissner 2016-2017.
+ * Copyright: Eugene Wissner 2016-2018.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/source/tanya/async/protocol.d b/source/tanya/async/protocol.d
index 728ef19..2795c16 100644
--- a/source/tanya/async/protocol.d
+++ b/source/tanya/async/protocol.d
@@ -9,7 +9,7 @@
  * When an event from the network arrives, a protocol method gets
  * called and can respond to the event.
  *
- * Copyright: Eugene Wissner 2016-2017.
+ * Copyright: Eugene Wissner 2016-2018.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/source/tanya/async/transport.d b/source/tanya/async/transport.d
index a2a5d28..108a295 100644
--- a/source/tanya/async/transport.d
+++ b/source/tanya/async/transport.d
@@ -6,7 +6,7 @@
  * This module contains transports which are responsible for data dilvery
  * between two parties of an asynchronous communication.
  *
- * Copyright: Eugene Wissner 2016-2017.
+ * Copyright: Eugene Wissner 2016-2018.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/source/tanya/async/watcher.d b/source/tanya/async/watcher.d
index c9d58b3..9ecb300 100644
--- a/source/tanya/async/watcher.d
+++ b/source/tanya/async/watcher.d
@@ -5,7 +5,7 @@
 /**
  * Watchers register user's interest in some event.
  *
- * Copyright: Eugene Wissner 2016-2017.
+ * Copyright: Eugene Wissner 2016-2018.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
@@ -14,8 +14,6 @@
  */
 module tanya.async.watcher;
 
-import std.exception;
-import std.functional;
 import tanya.async.loop;
 import tanya.async.protocol;
 import tanya.async.transport;