diff --git a/Project.toml b/Project.toml
index 19c4df1..1369c04 100644
--- a/Project.toml
+++ b/Project.toml
@@ -35,7 +35,7 @@ OffsetArrays = "1"
 Parameters = "0.12"
 ParticleMethods = "0.1.0"
 Plots = "1"
-PoissonSolvers = "0.1.0"
+PoissonSolvers = "0.1.0, 0.3"
 RecursiveArrayTools = "2"
 TypedTables = "1"
 VlasovMethods = "0.1"