diff --git a/crates/parry2d-f64/Cargo.toml b/crates/parry2d-f64/Cargo.toml
index 3dbfc389..c42db969 100644
--- a/crates/parry2d-f64/Cargo.toml
+++ b/crates/parry2d-f64/Cargo.toml
@@ -53,7 +53,7 @@ approx = { version = "0.5", default-features = false }
 serde = { version = "1.0", optional = true, features = ["derive"] }
 rkyv = { version = "0.7.41", optional = true }
 num-derive = "0.4"
-indexmap = { version = "1", features = ["serde-1"], optional = true }
+indexmap = { version = "2", features = ["serde"], optional = true }
 rustc-hash = { version = "1", optional = true }
 cust_core = { version = "0.1", optional = true }
 spade = { version = "2", optional = true } # Make this optional?
diff --git a/crates/parry2d/Cargo.toml b/crates/parry2d/Cargo.toml
index 23709c25..c75b79a4 100644
--- a/crates/parry2d/Cargo.toml
+++ b/crates/parry2d/Cargo.toml
@@ -53,7 +53,7 @@ approx = { version = "0.5", default-features = false }
 serde = { version = "1.0", optional = true, features = ["derive"] }
 rkyv = { version = "0.7.41", optional = true }
 num-derive = "0.4"
-indexmap = { version = "1", features = ["serde-1"], optional = true }
+indexmap = { version = "2", features = ["serde"], optional = true }
 rustc-hash = { version = "1", optional = true }
 cust_core = { version = "0.1", optional = true }
 spade = { version = "2", optional = true }
diff --git a/crates/parry3d-f64/Cargo.toml b/crates/parry3d-f64/Cargo.toml
index 37ce4534..a6776f43 100644
--- a/crates/parry3d-f64/Cargo.toml
+++ b/crates/parry3d-f64/Cargo.toml
@@ -53,7 +53,7 @@ approx = { version = "0.5", default-features = false }
 serde = { version = "1.0", optional = true, features = ["derive", "rc"] }
 rkyv = { version = "0.7.41", optional = true }
 num-derive = "0.4"
-indexmap = { version = "1", features = ["serde-1"], optional = true }
+indexmap = { version = "2", features = [ "serde" ], optional = true }
 rustc-hash = { version = "1", optional = true }
 cust_core = { version = "0.1", optional = true }
 spade = { version = "2", optional = true } # Make this optional?
diff --git a/crates/parry3d/Cargo.toml b/crates/parry3d/Cargo.toml
index a05f6f69..5c1f3bc0 100644
--- a/crates/parry3d/Cargo.toml
+++ b/crates/parry3d/Cargo.toml
@@ -54,7 +54,7 @@ approx = { version = "0.5", default-features = false }
 serde = { version = "1.0", optional = true, features = ["derive", "rc"] }
 rkyv = { version = "0.7.41", optional = true }
 num-derive = "0.4"
-indexmap = { version = "1", features = ["serde-1"], optional = true }
+indexmap = { version = "2", features = [ "serde" ], optional = true }
 rustc-hash = { version = "1", optional = true }
 cust_core = { version = "0.1", optional = true }
 spade = { version = "2", optional = true } # Make this optional?