diff --git a/devtools/conda-envs/full-stack.yaml b/devtools/conda-envs/full-stack.yaml
index 1a88675..b1277fd 100644
--- a/devtools/conda-envs/full-stack.yaml
+++ b/devtools/conda-envs/full-stack.yaml
@@ -5,7 +5,7 @@ channels:
 dependencies:
   - python
   - pip
-  - openff-toolkit =0.15
+  - openff-toolkit ~=0.16
   - openff-fragmenter
   - openff-interchange =0.3
   - pymbar
@@ -31,4 +31,5 @@ dependencies:
 
   - openff-qcsubmit ~=0.50
   - qcarchivetesting
-  - h5py
\ No newline at end of file
+  - h5py
+