diff --git a/requirements.txt b/requirements.txt
index 1e86e61017a9f70631b25ba46ad808e16f0b715e..8e48bc1c8b0da2b4d81682839c688c0ac69637d5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 numpy
-sympy==1.0
+sympy==1.1.1
 git+https://github.com/inducer/pymbolic
 git+https://github.com/inducer/islpy
 git+https://github.com/inducer/pyopencl