diff --git a/requirements.txt b/requirements.txt
index deb093942eb18a06631afdde454793a5da1d2fb4..101166fb2a22e850d7698f14b16369bf083ca3d4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,5 @@
 numpy
+git+https://github.com/inducer/pytools.git
 git+https://github.com/inducer/pymbolic.git
 git+https://github.com/inducer/islpy.git
 git+https://github.com/inducer/pyopencl.git