diff --git a/.circleci/conda_env.yml b/.circleci/conda_env.yml
index f8ae988..4df7936 100644
--- a/.circleci/conda_env.yml
+++ b/.circleci/conda_env.yml
@@ -3,6 +3,7 @@ channels:
   - conda-forge
 dependencies:
   - gcc_linux-64
+  - gfortran_linux-64
   - setuptools
   - python
   - numpy