diff --git a/requirements.txt b/requirements.txt
index 8204d06123ea7735a026cff46285bebb34e68af7..ed07527b71bcc6b3fe19b41084eeb0f74ae20051 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 numpy
-sympy==1.1.1
+sympy
 pyrsistent
 git+https://github.com/inducer/pytools.git#egg=pytools
 git+https://github.com/inducer/pymbolic.git#egg=pymbolic