diff --git a/requirements.txt b/requirements.txt
index 6cef3a15d04d9832315353277ab43f7789468086..c4d401e3430862dab7ed63720bdeaaeeb5cae04b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1,2 @@
+wheel==0.33.6
 pymilter==1.0.4