diff --git a/requirements.txt b/requirements.txt
index c1ac27e..5e77a99 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 Cython==0.29.14
 flake8==3.7.9
 Jinja2==2.10.3
-pycapnp==0.6.4
+pycapnp==1.0.0b1
 pylint==2.4.3
 pyyaml==5.1.2
 scons==3.1.1