diff --git a/Project.toml b/Project.toml
index c6963d7..43e9354 100644
--- a/Project.toml
+++ b/Project.toml
@@ -36,7 +36,7 @@ MultivariateStats = "0.9, 0.10"
 NearestNeighbors = "0.4"
 POMDPModels = "0.4.20"
 POMDPTools = "0.1.6"
-POMDPs = "0.9.6"
+POMDPs = "0.9.6, 1"
 ParticleFilters = "0.5.6"
 StaticArrays = "1.9.3"
 julia = "1"