diff --git a/src/LinearResponse/LinearResponse.jl b/src/LinearResponse/LinearResponse.jl
index 23fb42be..01ec7816 100644
--- a/src/LinearResponse/LinearResponse.jl
+++ b/src/LinearResponse/LinearResponse.jl
@@ -8,7 +8,7 @@ using Plots: heatmap, theme_palette, scatter, RGB, cgrad
 using Latexify: Latexify, latexify, @L_str
 using Latexify.LaTeXStrings: LaTeXStrings
 
-using Symbolics: Num, Equation, substitute, unwrap
+using Symbolics: Num, Equation, unwrap
 using LinearAlgebra: norm, eigvals, eigen, eigvecs
 using OrderedCollections: OrderedDict