diff --git a/Project.toml b/Project.toml
index 34525f9..b54a285 100644
--- a/Project.toml
+++ b/Project.toml
@@ -19,7 +19,7 @@ SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 Aqua = "=0.8.16"
 BandedMatrices = "1"
 CompactBasisFunctions = "0.3, 0.4"
-ContinuumArrays = "0.18, 0.19, 0.20"
+ContinuumArrays = "0.18, 0.19, 0.20, 0.21"
 DomainSets = "0.8"
 FFTW = "1"
 GeometricBase = "0.14.8"