diff --git a/COPYING b/COPYING
index 94875825..43d83b44 100644
--- a/COPYING
+++ b/COPYING
@@ -1,4 +1,4 @@
-Copyright (C) 2015-2018 Toshinori Sato (@overlast)
+Copyright (C) 2015-2019 Toshinori Sato (@overlast)
 
       https://github.com/neologd/mecab-ipadic-neologd
 
diff --git a/README.ja.md b/README.ja.md
index ba23c920..ca99582c 100644
--- a/README.ja.md
+++ b/README.ja.md
@@ -399,7 +399,7 @@ mecab-ipadic-NEologd 使ってみて良い結果が得られた時は、ぜひ
 とても大きな励みになります。
 
 ## Copyrights
-Copyright (c) 2015-2018 Toshinori Sato (@overlast) All rights reserved.
+Copyright (c) 2015-2019 Toshinori Sato (@overlast) All rights reserved.
 
 ライセンスは Apache License, Version 2.0 です。下記をご参照下さい。
 
diff --git a/README.md b/README.md
index 457e173a..770f9215 100644
--- a/README.md
+++ b/README.md
@@ -290,7 +290,7 @@ Please use the following bibtex, when you refer mecab-ipadic-NEologd from your p
 Please star this github repository if mecab-ipadic-NEologd is very useful to your project ;)
 
 ## Copyrights
-Copyright (c) 2015-2018 Toshinori Sato (@overlast) All rights reserved.
+Copyright (c) 2015-2019 Toshinori Sato (@overlast) All rights reserved.
 
 We select the 'Apache License, Version 2.0'. Please check following link.
 
diff --git a/bin/install-mecab-ipadic-neologd b/bin/install-mecab-ipadic-neologd
index b64a5eef..8bf4c90f 100755
--- a/bin/install-mecab-ipadic-neologd
+++ b/bin/install-mecab-ipadic-neologd
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-# Copyright (C) 2015-2018 Toshinori Sato (@overlast)
+# Copyright (C) 2015-2019 Toshinori Sato (@overlast)
 #
 #       https://github.com/neologd/mecab-ipadic-neologd
 #
diff --git a/libexec/copy-dict-seed.sh b/libexec/copy-dict-seed.sh
index bfcbfb15..fcda3f2f 100755
--- a/libexec/copy-dict-seed.sh
+++ b/libexec/copy-dict-seed.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-# Copyright (C) 2015-2018 Toshinori Sato (@overlast)
+# Copyright (C) 2015-2019 Toshinori Sato (@overlast)
 #
 #       https://github.com/neologd/mecab-ipadic-neologd
 #
diff --git a/libexec/eliminate_redundant_entry.pl b/libexec/eliminate_redundant_entry.pl
index da98cf7d..e6f27ce5 100755
--- a/libexec/eliminate_redundant_entry.pl
+++ b/libexec/eliminate_redundant_entry.pl
@@ -1,6 +1,6 @@
 #!/usr/bin/env perl
 
-# Copyright (C) 2015-2018 Toshinori Sato (@overlast)
+# Copyright (C) 2015-2019 Toshinori Sato (@overlast)
 #
 #       https://github.com/neologd/mecab-ipadic-neologd
 #
diff --git a/libexec/git_rm_from_log_too.sh b/libexec/git_rm_from_log_too.sh
index bf489bb6..3e7b9a48 100755
--- a/libexec/git_rm_from_log_too.sh
+++ b/libexec/git_rm_from_log_too.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-# Copyright (C) 2015-2018 Toshinori Sato (@overlast)
+# Copyright (C) 2015-2019 Toshinori Sato (@overlast)
 #
 #       https://github.com/neologd/mecab-ipadic-neologd
 #
diff --git a/libexec/iconv_euc_to_utf8.sh b/libexec/iconv_euc_to_utf8.sh
index 60ce500d..983fbe4d 100755
--- a/libexec/iconv_euc_to_utf8.sh
+++ b/libexec/iconv_euc_to_utf8.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-# Copyright (C) 2015-2018 Toshinori Sato (@overlast)
+# Copyright (C) 2015-2019 Toshinori Sato (@overlast)
 #
 #       https://github.com/neologd/mecab-ipadic-neologd
 #
diff --git a/libexec/install-mecab-ipadic-neologd.sh b/libexec/install-mecab-ipadic-neologd.sh
index 8dad3266..8efaa2cb 100755
--- a/libexec/install-mecab-ipadic-neologd.sh
+++ b/libexec/install-mecab-ipadic-neologd.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-# Copyright (C) 2015-2018 Toshinori Sato (@overlast)
+# Copyright (C) 2015-2019 Toshinori Sato (@overlast)
 #
 #       https://github.com/neologd/mecab-ipadic-neologd
 #
diff --git a/libexec/make-mecab-ipadic-neologd.sh b/libexec/make-mecab-ipadic-neologd.sh
index f95b6a57..8b7e52ce 100755
--- a/libexec/make-mecab-ipadic-neologd.sh
+++ b/libexec/make-mecab-ipadic-neologd.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-# Copyright (C) 2015-2018 Toshinori Sato (@overlast)
+# Copyright (C) 2015-2019 Toshinori Sato (@overlast)
 #
 #       https://github.com/neologd/mecab-ipadic-neologd
 #
diff --git a/libexec/merge-ext-columns-using-git.sh b/libexec/merge-ext-columns-using-git.sh
index 55393b33..fe1fa4f8 100755
--- a/libexec/merge-ext-columns-using-git.sh
+++ b/libexec/merge-ext-columns-using-git.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-# Copyright (C) 2015-2018 Toshinori Sato (@overlast)
+# Copyright (C) 2015-2019 Toshinori Sato (@overlast)
 #
 #       https://github.com/neologd/mecab-ipadic-neologd
 #
diff --git a/libexec/test-mecab-ipadic-neologd.sh b/libexec/test-mecab-ipadic-neologd.sh
index 1f04bbe1..f3f914cb 100755
--- a/libexec/test-mecab-ipadic-neologd.sh
+++ b/libexec/test-mecab-ipadic-neologd.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-# Copyright (C) 2015-2018 Toshinori Sato (@overlast)
+# Copyright (C) 2015-2019 Toshinori Sato (@overlast)
 #
 #       https://github.com/neologd/mecab-ipadic-neologd
 #