diff --git a/requirements.txt b/requirements.txt
index 7027fed52..c65ea9f71 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ recursivenodes
 git+https://github.com/inducer/pytools.git#egg=pytools
 git+https://github.com/inducer/gmsh_interop.git#egg=gmsh_interop
 git+https://github.com/inducer/pyvisfile.git#egg=pyvisfile
-git+https://github.com/inducer/modepy.git#egg=modepy
+git+https://github.com/alexfikl/modepy.git@tensor-face-mass-matrix#egg=modepy
 git+https://github.com/inducer/pyopencl.git#egg=pyopencl
 git+https://github.com/inducer/islpy.git#egg=islpy