diff --git a/Project.toml b/Project.toml
index 494989cf..dcb908b4 100644
--- a/Project.toml
+++ b/Project.toml
@@ -39,6 +39,7 @@ EinExprs = "0.2"
 GraphMakie = "0.4,0.5"
 Graphs = "1.7"
 Makie = "0.18, 0.19"
+Muscle = "0.1"
 NetworkLayout = "0.4"
 OMEinsum = "0.7"
 Permutations = "0.4"