diff --git a/packages/python/2.7.18/build.sh b/packages/python/2.7.18/build.sh
index d973d04..3cd371d 100755
--- a/packages/python/2.7.18/build.sh
+++ b/packages/python/2.7.18/build.sh
@@ -18,4 +18,4 @@ cd ..
 
 rm -rf build 
 
-bin/pip2 install numpy scipy pandas pycrypto whoosh bcrypt passlib
+bin/pip2 install numpy==1.16.* scipy==1.2.* pandas==0.23.* pycrypto whoosh bcrypt==3.1.* passlib