diff --git a/requirements.txt b/requirements.txt
index ecb919fdba1d423cc2b397836f6412d1b69e257e..a3b444fe98fe52380c814cb30a04c770ba1e96c4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,6 +2,7 @@
 # should match https://pypi.python.org/pypi names. For the full spec or
 # dependency lines, see https://pip.readthedocs.org/en/1.1/requirements.html
 
+chardet
 psutil
 requests
 iso8601