diff --git a/requirements.txt b/requirements.txt
index a4cb4025..acc6214a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,5 +5,7 @@ git+https://github.com/inducer/pymbolic.git#egg=pymbolic
 git+https://github.com/inducer/pyopencl.git#egg=pyopencl
 git+https://github.com/inducer/islpy.git#egg=islpy
 
+git+https://github.com/kaushikcfd/feinsum.git#egg=feinsum
+
 git+https://github.com/inducer/loopy.git#egg=loopy
 git+https://github.com/inducer/pytato.git#egg=pytato