diff --git a/requirements.txt b/requirements.txt
index fb3b7322..9554a1e2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ progressbar2
 pyjson5
 pytest
 pyyaml
-scipy
+scipy==1.2.1
 simplejson
 sympy
 textx