diff --git a/Project.toml b/Project.toml
index f425456..2e8467d 100644
--- a/Project.toml
+++ b/Project.toml
@@ -51,6 +51,7 @@ TOML = "fa267f1f-6049-4f14-aa54-33bafae1ed76"
 
 [compat]
 CSV = "0.7, 0.8, 0.9.11, 0.10"
+DSP = "0.8"
 DataFrames = "0.20, 0.21, 0.22, 0.23, 0.24, 1, 1.1"
 DataInterpolations = "4.5, 5"
 EchelleCCFs = "0.2.8"