diff --git a/opensym2017/content/03-requirements.tex b/opensym2017/content/03-requirements.tex
index 47cc735..6eb12ed 100644
--- a/opensym2017/content/03-requirements.tex
+++ b/opensym2017/content/03-requirements.tex
@@ -127,7 +127,7 @@ to register an account at Github as well. Moreover, after the Edward Snowden
 case, the Brazilian government approved a specific law decree (8.135/2013) to
 rule its communication service. Summarily, services like Gmail, Google Drive,
 Dropbox, Live, Outlook, iCloud, as well, Google Groups, Github, etc do not
-could be user by a Brazilian public agent as tool for your work. To use these
+could be used by a Brazilian public agent as tool for your work. To use these
 kinds of services the Brazilian government needs to provide them to itself.
 Thus, we developed our own solution to cover all the requirements, producing a
 complete governmental integrated platform for collaborative software
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