diff --git a/requirements.txt b/requirements.txt
index ad1dc69..3572afe 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 -r _building/requirements.txt
 
 
-k3ut~=0.1.15
+k3ut>=0.1.15,<0.2