diff --git a/test/Project.toml b/test/Project.toml
index 26440ed1b0..5bc1605aad 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -38,7 +38,7 @@ ExponentialUtilities = "1"
 GLPK = "0.11 - 0.15, 1"
 GR = "0"
 IntervalArithmetic = "0.15 - 0.21"
-IntervalMatrices = "0.8"
+IntervalMatrices = "0.8 - 0.9"
 Ipopt = "1"
 Javis = "0.5 - 0.9"
 JuMP = "0.21 - 0.23, 1"