diff --git a/Cargo.lock b/Cargo.lock
index b84d5dc3..3da551a9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -304,9 +304,9 @@ dependencies = [
 
 [[package]]
 name = "indexmap"
-version = "2.9.0"
+version = "2.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cea70ddb795996207ad57735b50c5982d8844f38ba9ee5f1aedcfb708a2aa11e"
+checksum = "fe4cd85333e22411419a0bcae1297d25e58c9443848b11dc6a86fefe8c78a661"
 dependencies = [
  "equivalent",
  "hashbrown",
diff --git a/Cargo.toml b/Cargo.toml
index 345aec34..b117e977 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -40,7 +40,7 @@ required-features = ["zopfli"]
 [dependencies]
 zopfli = { version = "0.8.2", optional = true, default-features = false, features = ["std", "zlib"] }
 rgb = "0.8.50"
-indexmap = "2.9.0"
+indexmap = "2.10.0"
 libdeflater = "1.24.0"
 log = "0.4.27"
 bitvec = "1.0.1"