diff --git a/requirements.txt b/requirements.txt
index 0123b8dd14..c58deb5e63 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 pip>=9.0.1
 numpy>1.16
-sympy<1.6
+sympy<1.10
 scipy
 flake8>=2.1.0
 nbval