diff --git a/Project.toml b/Project.toml
index e242c6d..32c26f6 100644
--- a/Project.toml
+++ b/Project.toml
@@ -9,6 +9,7 @@ MAT = "23992714-dd62-5051-b70f-ba57cb901cac"
 Plots = "91a5bcdd-55d7-5caf-9e0b-520d859cae80"
 
 [compat]
+FFTW = "1"
 Images = "0.26"
 Plots = "1"