diff --git a/devtools/conda-envs/test_env.yaml b/devtools/conda-envs/test_env.yaml
index ae4925c85..2b39af98d 100644
--- a/devtools/conda-envs/test_env.yaml
+++ b/devtools/conda-envs/test_env.yaml
@@ -3,7 +3,7 @@ channels:
   - conda-forge
   - openeye
 dependencies:
-  - ambertools <23
+  - ambertools
   - arsenic
   - autograd
   - click