diff --git a/requirements.txt b/requirements.txt
index dd15a69ebf6dade1ca2fb2df0bdc3644b6b8c6d8..0c592bc1155b0724d45c58ff6c2bc6032b2cc03d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,5 +7,5 @@ git+https://github.com/inducer/islpy
 git+https://github.com/inducer/loopy
 git+https://gitlab.tiker.net/inducer/boxtree
 git+https://github.com/inducer/meshmode
-git+https://gitlab.tiker.net/inducer/sumpy
+git+https://gitlab.tiker.net/isuruf/sumpy@targetderivative
 git+https://gitlab.tiker.net/inducer/pyfmmlib