diff --git a/Requirements.txt b/Requirements.txt
index 0fe9d673..40527bcd 100644
--- a/Requirements.txt
+++ b/Requirements.txt
@@ -1,3 +1,4 @@
 Jinja2==2.7.3
 argparse==1.2.1
+chardet==2.2.1
 https://github.com/tiarno/plastex/archive/master.zip
\ No newline at end of file