diff --git a/Project.toml b/Project.toml
index b49b6e8185..965db8ce8f 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "DFTK"
 uuid = "acf6eb54-70d9-11e9-0013-234b7a5f5337"
-authors = ["Michael F. Herbst <info@michael-herbst.com>", "Antoine Levitt <antoine.levitt@inria.fr>"]
 version = "0.7.19"
+authors = ["Michael F. Herbst <info@michael-herbst.com>", "Antoine Levitt <antoine.levitt@inria.fr>"]
 
 [deps]
 AbstractFFTs = "621f4979-c628-5d54-868e-fcf4e3e8185c"
@@ -110,7 +110,7 @@ LinearMaps = "3"
 Logging = "1"
 MPI = "0.20.22"
 Markdown = "1"
-Optim = "1"
+Optim = "1, 2"
 PeriodicTable = "1"
 PkgVersion = "0.3"
 Plots = "1"