diff --git a/Project.toml b/Project.toml
index 9f6d59b6e..8cb8a575e 100644
--- a/Project.toml
+++ b/Project.toml
@@ -60,7 +60,7 @@ LaTeXStrings = "1"
 Measurements = "2"
 NLSolversBase = "7"
 Optim = "0.19,0.20"
-PDMats = "0.9"
+PDMats = "0.9, 0.10"
 ParallelProcessingTools = "0.4"
 Parameters = "0.12"
 PositiveFactorizations = "0.2"