diff --git a/environment-dev.yml b/environment-dev.yml
index 8f202f0..52277b2 100644
--- a/environment-dev.yml
+++ b/environment-dev.yml
@@ -11,5 +11,6 @@ dependencies:
   - codecov
   - dill
   - cloudpickle
+  - tblib
   - versioneer
   - pyyaml
diff --git a/environment.yml b/environment.yml
index 338825d..7203b62 100644
--- a/environment.yml
+++ b/environment.yml
@@ -6,3 +6,4 @@ dependencies:
   - mpi4py
   - dill
   - cloudpickle
+  - tblib