diff --git a/Project.toml b/Project.toml
index a924edc35a..5f6e62ebf9 100644
--- a/Project.toml
+++ b/Project.toml
@@ -98,7 +98,7 @@ GPUArraysCore = "0.1, 0.2"
 GenericLinearAlgebra = "0.3"
 GeometryOptimization = "0.1.3"
 Interpolations = "0.14, 0.15, 0.16"
-IntervalArithmetic = "0.20"
+IntervalArithmetic = "0.20, 1"
 IterTools = "1"
 JLD2 = "0.4, 0.5, 0.6"
 JSON3 = "1"