diff --git a/Project.toml b/Project.toml
index 8486df7..bd44f53 100644
--- a/Project.toml
+++ b/Project.toml
@@ -45,7 +45,7 @@ MCMCDiagnosticTools = "0.2.6"
 Optim = "1"
 OptimizationNLopt = "0.1"
 Pathfinder = "0.8"
-PosteriorDB = "0.3.2"
+PosteriorDB = "0.3.2, 0.4"
 ProgressLogging = "0.1"
 StanLogDensityProblems = "0.1"
 TerminalLoggers = "0.1"