diff --git a/opensym2017/content/05-requirements.tex b/opensym2017/content/05-requirements.tex
index 57f8678..9621846 100644
--- a/opensym2017/content/05-requirements.tex
+++ b/opensym2017/content/05-requirements.tex
@@ -3,11 +3,12 @@
 
 By preparing the SPB Portal evolution, the Brazilian Government has executed
 three steps to collect the requirements. The first step was the collection of
-proposals using an online tool called Pligg and the open sharing of them on the
-Internet.  In this step, the citizens have written and voted on proposals they
-were more interested in. At the end, the Brazilian Government collected about
-100 proposals and its initial perspective was to give to the most voted ones
-the priority of implementation on the new SPB Portal.
+proposals using an online tool called Pligg\footnote{\url{https://pligg.com}}
+and the open sharing of them on the Internet.  In this step, the citizens have
+written and voted on proposals they were more interested in. At the end, the
+Brazilian Government collected about 100 proposals and its initial perspective
+was to give to the most voted ones the priority of implementation on the new
+SPB Portal.
 
 The second step was two face-to-face meetings that aimed to discuss ideas (not
 necessarily based on the previous collected proposals) to improve the SPB
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