diff --git a/Project.toml b/Project.toml
index 6c18083a..2a9fd3e6 100644
--- a/Project.toml
+++ b/Project.toml
@@ -82,7 +82,7 @@ Logging = "1.9"
 Memoize = "0.4.4"
 NumericalIntegration = "0.3.3"
 Optim = "1.4, 2"
-Peaks = "0.3.2, 0.4, 0.5"
+Peaks = "0.3.2, 0.4, 0.5, 0.6"
 PhysicalConstants = "0.2"
 Pkg = "1.9"
 Polynomials = "2, 3, 4"