diff --git a/requirements.txt b/requirements.txt
index a670e1706f81b56bb9e8da65139db7bbc40e35c8..04bb87e3f46500d4458a27854d0ff7c05f67e12d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 numpy
-islpy>=2013.1
+git+git://github.com/inducer/islpy
 cgen
 git+git://github.com/inducer/pyopencl
 git+git://github.com/inducer/pymbolic