diff --git a/etc/environment.yml b/etc/environment.yml
index 81da6e8..b9816be 100644
--- a/etc/environment.yml
+++ b/etc/environment.yml
@@ -8,6 +8,5 @@ dependencies:
   - rdkit
   - pytest
   - tqdm
-  - pip
-  - pip:
-    - tensorflow
+  - numpy=1.19.*
+  - tensorflow