diff --git a/Project.toml b/Project.toml
index a1a4267f..d992ea80 100644
--- a/Project.toml
+++ b/Project.toml
@@ -20,7 +20,7 @@ WebIO = "0f1e0344-ec1d-5b48-a673-e5cf874b6c29"
 
 [compat]
 Blink = "0.12"
-JSExpr = "0.5"
+JSExpr = "0.5, 1"
 JSON = "0.20, 0.21"
 PlotlyBase = "0.6, ^0.7, 0.8"
 Reexport = "0.2, 1"