diff --git a/Project.toml b/Project.toml
index 6b2dcd5..215f546 100644
--- a/Project.toml
+++ b/Project.toml
@@ -19,7 +19,7 @@ StatsBase = "2913bbd2-ae8a-5f71-8c99-4fb6c76f3a91"
 Distributions = "0.25"
 ForwardDiff = "0.10, 1"
 KernelDensity = "0.6.9"
-Peaks = "0.5.3"
+Peaks = "0.5.3, 0.6"
 QuadGK = "2.11.2"
 Random = "1"
 Roots = "2"