diff --git a/Cargo.toml b/Cargo.toml
index 6c75951..407e497 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,7 +26,7 @@ bytes = "0.4"
 fnv = "1.0.5"
 
 [dev-dependencies]
-indexmap = "0.4"
+indexmap = "1.0"
 quickcheck = "0.6"
 rand = "0.4"
 seahash = "3.0.5"