diff --git a/Project.toml b/Project.toml
index 6a97932..762d2fe 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "HerbInterpret"
 uuid = "5bbddadd-02c5-4713-84b8-97364418cca7"
 authors = ["Tilman Hinnerichs <t.r.hinnerichs@tudelft.nl>", "Jaap de Jong <jaapdejong15@gmail.com>", "Sebastijan Dumancic <s.dumancic@tudelft.nl>", "Reuben Gardos Reid <R.J.GardosReid@tudelft.nl>"]
-version = "0.1.3"
+version = "0.1.4"
 
 [deps]
 HerbCore = "2b23ba43-8213-43cb-b5ea-38c12b45bd45"
@@ -10,7 +10,7 @@ HerbSpecification = "6d54aada-062f-46d8-85cf-a1ceaf058a06"
 
 [compat]
 HerbCore = "^0.3.0"
-HerbGrammar = "^0.3.0"
+HerbGrammar = "^0.4.0"
 HerbSpecification = "^0.1.0"
 julia = "^1.8"