diff --git a/environments/access-med/environment.yml b/environments/access-med/environment.yml
index acfd938..cbb38a4 100644
--- a/environments/access-med/environment.yml
+++ b/environments/access-med/environment.yml
@@ -72,6 +72,7 @@ dependencies:
 - astropy
 - tqdm
 - moderngl
+- ffmpeg
 - pip:
   - lavavu
   - railroad-diagrams ### Unlisted dependency of pip and pyparsing