diff --git a/environment.yml b/environment.yml
index 97eaed4d..b825df22 100644
--- a/environment.yml
+++ b/environment.yml
@@ -1,6 +1,8 @@
 dependencies:
   - python=3.6.1
   - pip
+  - openssl
+  - xz
   - setuptools
   - wheel
   - zlib