diff --git a/pyproject.toml b/pyproject.toml
index b881556..399ee46 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,7 +18,10 @@ classifiers = [
   "License :: OSI Approved :: MIT License",
   "Operating System :: OS Independent",
 ]
-dependencies = ["viser>=0.2.1"]
+dependencies = [
+  "viser>=0.2.1", 
+  "splines==0.3.0"
+]
 
 [project.optional-dependencies]
 dev = ["black", "isort", "ipdb"]