diff --git a/test/ppl/Project.toml b/test/ppl/Project.toml
index b798dc56..9b5132d2 100644
--- a/test/ppl/Project.toml
+++ b/test/ppl/Project.toml
@@ -6,5 +6,5 @@ Turing = "fce5fe82-541a-59a6-adf8-730c64b5f9a0"
 [compat]
 AbstractGPs = "0.5"
 Distributions = "0.25"
-Turing = "0.24, 0.25"
+Turing = "0.24, 0.25, 0.28"
 julia = "1.6"