diff --git a/environment.yml b/environment.yml
index ca80a2b9..ba0dc8c1 100644
--- a/environment.yml
+++ b/environment.yml
@@ -11,3 +11,4 @@ dependencies:
     - sphinx==5.0
     - sphinx-readable-theme==1.3.0
     - myst_nb==0.17.2
+    - lcov