diff --git a/Project.toml b/Project.toml
index 0e426947..d946989a 100644
--- a/Project.toml
+++ b/Project.toml
@@ -20,7 +20,7 @@ WebIO = "0f1e0344-ec1d-5b48-a673-e5cf874b6c29"
 Blink = "0.12"
 JSExpr = "0.5"
 JSON = "0.20, 0.21"
-PlotlyBase = "0.4"
+PlotlyBase = "0.4, 0.5"
 Reexport = "0.2"
 Requires = "1.0"
 WebIO = "0.8"