diff --git a/Cargo.toml b/Cargo.toml
index 599a46a..79dbbcd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -46,7 +46,7 @@ byteorder = "1.0"
 log = "0.4.1"
 fnv = "1.0.5"
 slab = "0.4.0"
-string = "0.1"
+string = "0.2"
 indexmap = "1.0"
 
 [dev-dependencies]
diff --git a/tests/h2-support/Cargo.toml b/tests/h2-support/Cargo.toml
index fb46928..22404af 100644
--- a/tests/h2-support/Cargo.toml
+++ b/tests/h2-support/Cargo.toml
@@ -10,6 +10,6 @@ bytes = "0.4.7"
 env_logger = "0.5.9"
 futures = "0.1.21"
 http = "0.1.5"
-string = "0.1.0"
+string = "0.2"
 tokio-io = "0.1.6"
 tokio-timer = "0.1.2"