diff --git a/Project.toml b/Project.toml
index d936c88a76..3206fdd1de 100644
--- a/Project.toml
+++ b/Project.toml
@@ -34,7 +34,7 @@ CSV = "0.10"
 DataFrames = "1"
 Dates = "1"
 EnumX = "1"
-HiGHS = "=1.23.0"
+HiGHS = "=1.23.0, 1"
 JSON = "0.21"
 JuMP = "1"
 LinearAlgebra = "1"