diff --git a/Project.toml b/Project.toml
index 4c0aa40..b832e0f 100644
--- a/Project.toml
+++ b/Project.toml
@@ -21,7 +21,7 @@ DiscreteValueIteration = "0.4.4"
 POMDPTools = "0.1, 1"
 POMDPs = "0.9, 1"
 Parameters = "0.12"
-ParticleFilters = "0.5"
+ParticleFilters = "0.5, 0.6"
 StaticArrays = "1"
 julia = "1"