diff --git a/Project.toml b/Project.toml
index 31b2c16..fa71b06 100644
--- a/Project.toml
+++ b/Project.toml
@@ -16,13 +16,13 @@ Tensors = "48a634ad-e948-5137-8d70-aa71f2a747f4"
 
 [compat]
 BinaryProvider = "0.5.7"
-CxxWrap = "= 0.8.1"
+CxxWrap = "= 0.8.1, 0.9"
 FEMBase = "0.2.2"
 FEMMaterials = "0.1.0"
 Materials = "0.2.0"
-julia = "1"
 Parameters = "0.12.0"
 Tensors = "1.2.0"
+julia = "1"
 
 [extras]
 JuAFEM = "30d91d44-8115-11e8-1d28-c19a5ac16de8"