diff --git a/Project.toml b/Project.toml
index e4e1ea2ac..91d190d65 100644
--- a/Project.toml
+++ b/Project.toml
@@ -41,7 +41,7 @@ AbstractTrees = "0.4"
 ArrayInterface = "7.8"
 Bijections = "0.1.2, 0.2"
 ChainRulesCore = "1"
-Combinatorics = "1 - 1.0.2"
+Combinatorics = "1 - 1.0.2, 1"
 ConstructionBase = "1.5.7"
 DataStructures = "0.18, 0.19"
 DocStringExtensions = "0.8, 0.9"