diff --git a/Cargo.toml b/Cargo.toml
index b62878cc8..9276fb2d4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -51,7 +51,7 @@ images = ["image", "lazy_static"]
 
 [dev-dependencies]
 color-backtrace = "0.7" # wait for MSVR 1.70 to update
-ctor = "0.4"
+ctor = "0.6"
 maplit = "1.0"
 
 [dev-dependencies.async-std]