diff --git a/Project.toml b/Project.toml
index 2b49d2d..8f5006c 100644
--- a/Project.toml
+++ b/Project.toml
@@ -21,7 +21,7 @@ Symbolics = "0c5d862f-8b57-4792-8d23-62f2024744c7"
 
 [compat]
 Documenter = "0.25, 0.26, 0.27, 1"
-EulerLagrange = "0.3"
+EulerLagrange = "0.3, 0.4"
 GeometricBase = "0.7, 0.8, 0.9, 0.10"
 GeometricEquations = "0.18"
 GeometricSolutions = "0.3, 0.4"