diff --git a/Project.toml b/Project.toml
index 3172dde..8a61d4f 100644
--- a/Project.toml
+++ b/Project.toml
@@ -22,7 +22,7 @@ DiffRules = "1.5"
 DocStringExtensions = "~0.8, ~0.9"
 ForwardDiff = "1"
 IntervalArithmetic = "1"
-IntervalRootFinding = "~0.6"
+IntervalRootFinding = "~0.6, 0.7"
 NaNMath = "0.3.5, 1.0"
 NNlib = "~0.8, ~0.9"
 Reexport = "~0.2, ~1"