diff --git a/requirements.txt b/requirements.txt
index d46cea68..d7525730 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-sympy!=1.5*,!=1.6rc1,!=1.6rc2,!=1.6,!=1.10,!=1.10.*
+sympy!=1.5,!=1.5.*,!=1.6rc1,!=1.6rc2,!=1.6,!=1.10,!=1.10.*
 scipy
 numpy>=1.8.2
 pytest