diff --git a/LICENSE b/LICENSE
index c201f4e33c23d53acc284f6fe43cb71a78865194..d645695673349e3947e8e5ae42332d0ac3164cd7 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,8 +1,202 @@
-* COMMENT -*- mode: org -*-
-#+Date: 2019-04-11
-Time-stamp: <2019-04-11>
-
-* Credit
-** peppa-pig-50.png is created from linux kernel logo at
-https://www.kernel.org/theme/images/logos/tux.png under Creative Commons
-Attribution ShareAlike 4.0 International License.
+
+ Apache License
+ Version 2.0, January 2004
+ http://www.apache.org/licenses/
+
+ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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+ form, that is based on (or derived from) the Work and for which the
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+ "Contribution" shall mean any work of authorship, including
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+ "Contributor" shall mean Licensor and any individual or Legal Entity
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+ 2. Grant of Copyright License. Subject to the terms and conditions of
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+ meet the following conditions:
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+ (a) You must give any other recipients of the Work or
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+ (b) You must cause any modified files to carry prominent notices
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+ (c) You must retain, in the Source form of any Derivative Works
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+ notices within Derivative Works that You distribute, alongside
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+ that such additional attribution notices cannot be construed
+ as modifying the License.
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+ You may add Your own copyright statement to Your modifications and
+ may provide additional or different license terms and conditions
+ for use, reproduction, or distribution of Your modifications, or
+ for any such Derivative Works as a whole, provided Your use,
+ reproduction, and distribution of the Work otherwise complies with
+ the conditions stated in this License.
+
+ 5. Submission of Contributions. Unless You explicitly state otherwise,
+ any Contribution intentionally submitted for inclusion in the Work
+ by You to the Licensor shall be under the terms and conditions of
+ this License, without any additional terms or conditions.
+ Notwithstanding the above, nothing herein shall supersede or modify
+ the terms of any separate license agreement you may have executed
+ with Licensor regarding such Contributions.
+
+ 6. Trademarks. This License does not grant permission to use the trade
+ names, trademarks, service marks, or product names of the Licensor,
+ except as required for reasonable and customary use in describing the
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+ 7. Disclaimer of Warranty. Unless required by applicable law or
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+ 8. Limitation of Liability. In no event and under no legal theory,
+ whether in tort (including negligence), contract, or otherwise,
+ unless required by applicable law (such as deliberate and grossly
+ negligent acts) or agreed to in writing, shall any Contributor be
+ liable to You for damages, including any direct, indirect, special,
+ incidental, or consequential damages of any character arising as a
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+ has been advised of the possibility of such damages.
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+
+ APPENDIX: How to apply the Apache License to your work.
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+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
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+
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diff --git a/NOTICE b/NOTICE
new file mode 100644
index 0000000000000000000000000000000000000000..9046f3a834c2325c7e88483aaae0fdd993a573ae
--- /dev/null
+++ b/NOTICE
@@ -0,0 +1,11 @@
+* COMMENT -*- mode: org -*-
+#+Date: 2019-04-11
+Time-stamp: <2019-09-02>
+
+* zero-panel
+Copyright (C) 2019 Yuanle Song <sylecn@gmail.com>
+
+* Credit
+peppa-pig-50.png is created from linux kernel logo at
+https://www.kernel.org/theme/images/logos/tux.png under Creative Commons
+Attribution ShareAlike 4.0 International License.
diff --git a/README b/README
new file mode 100644
index 0000000000000000000000000000000000000000..72d7e792b75b0ca154cdf5c3fbbe83255f108ba1
--- /dev/null
+++ b/README
@@ -0,0 +1,9 @@
+* COMMENT -*- mode: org -*-
+#+Date: 2019-09-02
+Time-stamp: <2019-09-02>
+
+* zero-panel
+zero-panel is a dbus service to provides a gtk3 based panel for showing
+candidates for zero-el input methods.
+
+You can check zero-el document at https://blog.emacsos.com/zero-el.html
diff --git a/client-demo.c b/client-demo.c
index 23c0e032805b0d6e7f0f3cddc9447b3b5c7b353f..2cab911db0b0eb57cdc468c604efea1323b52e55 100644
--- a/client-demo.c
+++ b/client-demo.c
@@ -1,3 +1,16 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
#include <gio/gio.h>
#include <glib.h>
#ifdef G_OS_UNIX
diff --git a/meson.build b/meson.build
index b58e57f9417f33867eea01a7ecc3c5e0a3697eb2..43567a3cb1e079e2bb68cea8dd6fd5bb842ca4d2 100644
--- a/meson.build
+++ b/meson.build
@@ -1,6 +1,6 @@
# -*- mode: conf -*-
project('zero-panel', 'c',
- version: '1.0.0',
+ version: '1.0.1',
license: 'EPL-2.0',
default_options: [
'warning_level=3',
diff --git a/operational b/operational
new file mode 100644
index 0000000000000000000000000000000000000000..a9ef1a03ddfaedf6c15bc5770bd6eb5b021151f0
--- /dev/null
+++ b/operational
@@ -0,0 +1,13 @@
+* COMMENT -*- mode: org -*-
+#+Date: 2019-09-02
+Time-stamp: <2019-09-02>
+#+STARTUP: content
+* notes :entry:
+* later :entry:
+* current :entry:
+**
+** 2019-09-02 remove black bg in round corner. should be transparent.
+is it because I don't have a compositor that support alpha?
+* done :entry:
+** 2019-09-02 apply apache license.
+* wontfix :entry:
diff --git a/server.c b/server.c
index 4ab3bf09236c95d4402909e749c7c5f68671bcde..73419436a590b5480ec05c0708ab51c964cbad19 100644
--- a/server.c
+++ b/server.c
@@ -1,3 +1,16 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
#include <stdlib.h>
#include <gtk/gtk.h>
#ifdef G_OS_UNIX