diff --git a/Project.toml b/Project.toml
index 72f1163..ec69a89 100644
--- a/Project.toml
+++ b/Project.toml
@@ -69,7 +69,7 @@ Static = "0.5, 0.6"
 StatsBase = "0.33"
 StatsFuns = "0.9, 1"
 SymbolicUtils = "0.17, 0.18, 0.19"
-TransformVariables = "0.5, 0.6"
+TransformVariables = "0.5, 0.6, 0.8"
 TupleVectors = "0.1, 0.2"
 julia = "1.6"