diff --git a/codegen/Cargo.toml b/codegen/Cargo.toml
index db1eaf6e..c30ad6b2 100644
--- a/codegen/Cargo.toml
+++ b/codegen/Cargo.toml
@@ -16,7 +16,7 @@ plugin = true
 
 [dependencies]
 rocket = { version = "0.4.0-dev", path = "../lib/" }
-indexmap = "0.4"
+indexmap = "1.0"
 log = "0.4"
 
 [dev-dependencies]
diff --git a/lib/Cargo.toml b/lib/Cargo.toml
index 85dbd843..983e0bf0 100644
--- a/lib/Cargo.toml
+++ b/lib/Cargo.toml
@@ -33,7 +33,7 @@ pear_codegen = "0.0.13"
 rustls = { version = "0.12.0", optional = true }
 hyper = { version = "0.10.13", default-features = false }
 hyper-sync-rustls = { version = "=0.3.0-rc.2", features = ["server"], optional = true }
-indexmap = "0.4"
+indexmap = "1.0"
 isatty = "0.1"
 
 [dependencies.cookie]