diff --git a/Project.toml b/Project.toml
index 85e6695..cb5e477 100644
--- a/Project.toml
+++ b/Project.toml
@@ -20,7 +20,7 @@ UnPack = "3a884ed6-31ef-47d7-9d2a-63182c4928ed"
 [compat]
 BEASTXMLConstructor = "0.1.2"
 BeastUtils = "0.1.2"
-CSV = "0.8"
+CSV = "0.8, 0.9"
 DataFrames = "0.20, 0.21, 0.22, 1.0"
 EzXML = "1.0, 1.1"
 JLD = "0.9, 0.10, 0.12"