diff --git a/packages/python/3.9.4/build.sh b/packages/python/3.9.4/build.sh
index f9ab88c..1966bd9 100755
--- a/packages/python/3.9.4/build.sh
+++ b/packages/python/3.9.4/build.sh
@@ -18,4 +18,4 @@ cd ..
 
 rm -rf build 
 
-bin/pip3 install numpy scipy pandas pycrypto whoosh bcrypt passlib
+bin/pip3 install numpy scipy pandas pycrypto whoosh bcrypt passlib sympy