diff --git a/requirements.txt b/requirements.txt
index a2247fea500d67f6dfb762f0214ddbfb921d1b00..daefe6b51c395e2707d63246ccba62d40ad34fd7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
+bitstring
 docrep
 future
 numpy