diff --git a/Cargo.lock b/Cargo.lock
index 511de2fb..72ec4585 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1522,9 +1522,9 @@ dependencies = [
 
 [[package]]
 name = "indexmap"
-version = "2.12.1"
+version = "2.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0ad4bb2b565bca0645f4d68c5c9af97fba094e9791da685bf83cb5f3ce74acf2"
+checksum = "7714e70437a7dc3ac8eb7e6f8df75fd8eb422675fc7678aff7364301092b1017"
 dependencies = [
  "equivalent",
  "hashbrown 0.16.1",
@@ -2820,7 +2820,7 @@ dependencies = [
  "http-body-util",
  "hyper",
  "hyper-util",
- "indexmap 2.12.1",
+ "indexmap 2.13.0",
  "lazy-regex",
  "logging",
  "mockall",
@@ -2953,7 +2953,7 @@ dependencies = [
  "chrono",
  "hex",
  "indexmap 1.9.3",
- "indexmap 2.12.1",
+ "indexmap 2.13.0",
  "schemars 0.9.0",
  "schemars 1.0.4",
  "serde_core",
@@ -2980,7 +2980,7 @@ version = "0.9.34+deprecated"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6a8b1a1a2ebf674015cc02edccce75287f1a0130d394307b36743c2f5d504b47"
 dependencies = [
- "indexmap 2.12.1",
+ "indexmap 2.13.0",
  "itoa",
  "ryu",
  "serde",
@@ -3262,7 +3262,7 @@ dependencies = [
  "futures-util",
  "hashbrown 0.15.5",
  "hashlink",
- "indexmap 2.12.1",
+ "indexmap 2.13.0",
  "log",
  "memchr",
  "native-tls",
@@ -4334,7 +4334,7 @@ dependencies = [
  "http-body-util",
  "hyper",
  "hyper-util",
- "indexmap 2.12.1",
+ "indexmap 2.13.0",
  "serde",
  "serde_json",
  "tokio",
diff --git a/crates/voicevox/Cargo.toml b/crates/voicevox/Cargo.toml
index 887a6193..e8420029 100644
--- a/crates/voicevox/Cargo.toml
+++ b/crates/voicevox/Cargo.toml
@@ -19,7 +19,7 @@ workspace = true
 workspace = true
 
 [dependencies.indexmap]
-version = "2.12.1"
+version = "2.13.0"
 features = ["serde"]
 
 [dependencies.serde]
diff --git a/seitai/Cargo.toml b/seitai/Cargo.toml
index 2c15222e..f911f079 100644
--- a/seitai/Cargo.toml
+++ b/seitai/Cargo.toml
@@ -29,7 +29,7 @@ workspace = true
 workspace = true
 
 [dependencies.indexmap]
-version = "2.12.1"
+version = "2.13.0"
 features = ["serde"]
 
 [dependencies.lazy-regex]