diff --git a/DESCRIPTION b/DESCRIPTION
index 71f20118..684bd25e 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -11,7 +11,7 @@ Description: Este pacote disponibiliza uma base de dados sobre os
seguintes sistemas que abastecem a Região Metropolitana de São Paulo:
Cantareira, Alto Tietê, Guarapiranga, Cotia, Rio Grande, Rio Claro,
São Loureço. Dados obtidos através da API da SABESP.
-License: GPL (>= 3)
+License: CC BY 4.0
Encoding: UTF-8
LazyData: true
Roxygen: list(markdown = TRUE)
diff --git a/LICENSE.md b/LICENSE.md
index 175443ce..0fb847eb 100644
--- a/LICENSE.md
+++ b/LICENSE.md
@@ -1,595 +1,395 @@
-GNU General Public License
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-connection with the Program, unless a warranty or assumption of liability accompanies
-a copy of the Program in return for a fee.
-
-_END OF TERMS AND CONDITIONS_
-
-## How to Apply These Terms to Your New Programs
-
-If you develop a new program, and you want it to be of the greatest possible use to
-the public, the best way to achieve this is to make it free software which everyone
-can redistribute and change under these terms.
-
-To do so, attach the following notices to the program. It is safest to attach them
-to the start of each source file to most effectively state the exclusion of warranty;
-and each file should have at least the “copyright” line and a pointer to
-where the full notice is found.
-
-
- Copyright (C)
-
- This program is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see .
-
-Also add information on how to contact you by electronic and paper mail.
-
-If the program does terminal interaction, make it output a short notice like this
-when it starts in an interactive mode:
-
- Copyright (C)
- This program comes with ABSOLUTELY NO WARRANTY; for details type 'show w'.
- This is free software, and you are welcome to redistribute it
- under certain conditions; type 'show c' for details.
-
-The hypothetical commands `show w` and `show c` should show the appropriate parts of
-the General Public License. Of course, your program's commands might be different;
-for a GUI interface, you would use an “about box”.
-
-You should also get your employer (if you work as a programmer) or school, if any, to
-sign a “copyright disclaimer” for the program, if necessary. For more
-information on this, and how to apply and follow the GNU GPL, see
-<>.
-
-The GNU General Public License does not permit incorporating your program into
-proprietary programs. If your program is a subroutine library, you may consider it
-more useful to permit linking proprietary applications with the library. If this is
-what you want to do, use the GNU Lesser General Public License instead of this
-License. But first, please read
-<>.
+Attribution 4.0 International
+
+=======================================================================
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+Section 2 -- Scope.
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+
+ b. produce, reproduce, and Share Adapted Material.
+
+ 2. Exceptions and Limitations. For the avoidance of doubt, where
+ Exceptions and Limitations apply to Your use, this Public
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+ Licensor waives and/or agrees not to assert any right or
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+ simply making modifications authorized by this Section 2(a)
+ (4) never produces Adapted Material.
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+ 5. Downstream recipients.
+
+ a. Offer from the Licensor -- Licensed Material. Every
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+Section 3 -- License Conditions.
+
+Your exercise of the Licensed Rights is expressly made subject to the
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+
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+Section 5 -- Disclaimer of Warranties and Limitation of Liability.
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+Section 6 -- Term and Termination.
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+ For the avoidance of doubt, this Section 6(b) does not affect any
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