diff --git a/Cargo.lock b/Cargo.lock
index 4317b87d0d642..c83c07c36792b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -464,7 +464,7 @@ dependencies = [
  "fnv",
  "futures-util",
  "http 1.1.0",
- "indexmap 2.5.0",
+ "indexmap 2.6.0",
  "mime",
  "multer",
  "num-traits",
@@ -514,7 +514,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "69117c43c01d81a69890a9f5dd6235f2f027ca8d1ec62d6d3c5e01ca0edb4f2b"
 dependencies = [
  "bytes 1.7.1",
- "indexmap 2.5.0",
+ "indexmap 2.6.0",
  "serde",
  "serde_json",
 ]
@@ -3431,7 +3431,7 @@ dependencies = [
  "flate2",
  "futures 0.3.30",
  "glob",
- "indexmap 2.5.0",
+ "indexmap 2.6.0",
  "libc",
  "quickcheck",
  "scan_fmt",
@@ -3911,7 +3911,7 @@ dependencies = [
  "futures-sink",
  "futures-util",
  "http 0.2.9",
- "indexmap 2.5.0",
+ "indexmap 2.6.0",
  "slab",
  "tokio",
  "tokio-util",
@@ -3930,7 +3930,7 @@ dependencies = [
  "futures-core",
  "futures-sink",
  "http 1.1.0",
- "indexmap 2.5.0",
+ "indexmap 2.6.0",
  "slab",
  "tokio",
  "tokio-util",
@@ -3977,6 +3977,12 @@ dependencies = [
  "allocator-api2",
 ]
 
+[[package]]
+name = "hashbrown"
+version = "0.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e087f84d4f86bf4b218b927129862374b72199ae7d8657835f1e89000eea4fb"
+
 [[package]]
 name = "hdrhistogram"
 version = "7.5.4"
@@ -4619,12 +4625,12 @@ dependencies = [
 
 [[package]]
 name = "indexmap"
-version = "2.5.0"
+version = "2.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "68b900aa2f7301e21c36462b170ee99994de34dff39a4a6a528e80e7376d07e5"
+checksum = "707907fe3c25f5424cce2cb7e1cbcafee6bdbe735ca90ef77c29e84591e5b9da"
 dependencies = [
  "equivalent",
- "hashbrown 0.14.5",
+ "hashbrown 0.15.0",
  "serde",
 ]
 
@@ -5468,7 +5474,7 @@ version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fb791d015f8947acf5a7f62bd28d00f289bb7ea98cfbe3ffec1d061eee12df12"
 dependencies = [
- "indexmap 2.5.0",
+ "indexmap 2.6.0",
  "itoa",
  "lockfree-object-pool",
  "metrics",
@@ -5489,7 +5495,7 @@ dependencies = [
  "crossbeam-epoch",
  "crossbeam-utils",
  "hashbrown 0.14.5",
- "indexmap 2.5.0",
+ "indexmap 2.6.0",
  "metrics",
  "num_cpus",
  "ordered-float 4.3.0",
@@ -5744,7 +5750,7 @@ version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "17ebbe97acce52d06aebed4cd4a87c0941f4b2519b59b82b4feb5bd0ce003dfd"
 dependencies = [
- "indexmap 2.5.0",
+ "indexmap 2.6.0",
  "itertools 0.13.0",
  "ndarray",
  "noisy_float",
@@ -6597,7 +6603,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e1d3afd2628e69da2be385eb6f2fd57c8ac7977ceeff6dc166ff1657b0e386a9"
 dependencies = [
  "fixedbitset",
- "indexmap 2.5.0",
+ "indexmap 2.6.0",
 ]
 
 [[package]]
@@ -7055,7 +7061,7 @@ dependencies = [
 name = "prometheus-parser"
 version = "0.1.0"
 dependencies = [
- "indexmap 2.5.0",
+ "indexmap 2.6.0",
  "nom",
  "num_enum 0.7.3",
  "prost 0.12.6",
@@ -8487,7 +8493,7 @@ version = "1.0.128"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6ff5456707a1de34e7e37f2a6fd3d3f808c318259cbd01ab6377795054b483d8"
 dependencies = [
- "indexmap 2.5.0",
+ "indexmap 2.6.0",
  "itoa",
  "memchr",
  "ryu",
@@ -8585,7 +8591,7 @@ dependencies = [
  "chrono",
  "hex",
  "indexmap 1.9.3",
- "indexmap 2.5.0",
+ "indexmap 2.6.0",
  "serde",
  "serde_derive",
  "serde_json",
@@ -8635,7 +8641,7 @@ version = "0.9.34+deprecated"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6a8b1a1a2ebf674015cc02edccce75287f1a0130d394307b36743c2f5d504b47"
 dependencies = [
- "indexmap 2.5.0",
+ "indexmap 2.6.0",
  "itoa",
  "ryu",
  "serde",
@@ -9630,7 +9636,7 @@ version = "0.19.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1b5bb770da30e5cbfde35a2d7b9b8a2c4b8ef89548a7a6aeab5c9a576e3e7421"
 dependencies = [
- "indexmap 2.5.0",
+ "indexmap 2.6.0",
  "toml_datetime",
  "winnow 0.5.18",
 ]
@@ -9641,7 +9647,7 @@ version = "0.20.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "70f427fce4d84c72b5b732388bf4a9f4531b53f74e2887e3ecb2481f68f66d81"
 dependencies = [
- "indexmap 2.5.0",
+ "indexmap 2.6.0",
  "toml_datetime",
  "winnow 0.5.18",
 ]
@@ -9652,7 +9658,7 @@ version = "0.22.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "583c44c02ad26b0c3f3066fe629275e50627026c51ac2e595cca4c230ce1ce1d"
 dependencies = [
- "indexmap 2.5.0",
+ "indexmap 2.6.0",
  "serde",
  "serde_spanned",
  "toml_datetime",
@@ -10325,7 +10331,7 @@ dependencies = [
  "dunce",
  "glob",
  "hex",
- "indexmap 2.5.0",
+ "indexmap 2.6.0",
  "indicatif",
  "itertools 0.13.0",
  "log",
@@ -10427,7 +10433,7 @@ dependencies = [
  "hyper 0.14.28",
  "hyper-openssl",
  "hyper-proxy",
- "indexmap 2.5.0",
+ "indexmap 2.6.0",
  "indoc",
  "infer 0.16.0",
  "inventory",
@@ -10612,7 +10618,7 @@ dependencies = [
  "crossbeam-utils",
  "derivative",
  "futures 0.3.30",
- "indexmap 2.5.0",
+ "indexmap 2.6.0",
  "metrics",
  "nom",
  "ordered-float 4.3.0",
@@ -10643,7 +10649,7 @@ dependencies = [
  "chrono-tz",
  "encoding_rs",
  "http 0.2.9",
- "indexmap 2.5.0",
+ "indexmap 2.6.0",
  "inventory",
  "no-proxy",
  "num-traits",
@@ -10714,7 +10720,7 @@ dependencies = [
  "headers",
  "http 0.2.9",
  "hyper-proxy",
- "indexmap 2.5.0",
+ "indexmap 2.6.0",
  "ipnet",
  "metrics",
  "metrics-tracing-context",
@@ -10953,7 +10959,7 @@ dependencies = [
  "hostname 0.4.0",
  "iana-time-zone",
  "idna 0.5.0",
- "indexmap 2.5.0",
+ "indexmap 2.6.0",
  "indoc",
  "influxdb-line-protocol",
  "itertools 0.13.0",
diff --git a/Cargo.toml b/Cargo.toml
index b173d4ede3bd4..61051a9db4fb9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -135,7 +135,7 @@ chrono-tz = { version = "0.10.0", default-features = false, features = ["serde"]
 clap = { version = "4.5.18", default-features = false, features = ["derive", "error-context", "env", "help", "std", "string", "usage", "wrap_help"] }
 futures = { version = "0.3.30", default-features = false, features = ["compat", "io-compat", "std"], package = "futures" }
 glob = { version = "0.3.1", default-features = false }
-indexmap = { version = "2.5.0", default-features = false, features = ["serde", "std"] }
+indexmap = { version = "2.6.0", default-features = false, features = ["serde", "std"] }
 metrics = "0.22.3"
 metrics-tracing-context = { version = "0.15.0", default-features = false }
 metrics-util = { version = "0.16.3", default-features = false, features = ["registry"] }
diff --git a/lib/file-source/Cargo.toml b/lib/file-source/Cargo.toml
index 8e343a7963126..2d27d59800110 100644
--- a/lib/file-source/Cargo.toml
+++ b/lib/file-source/Cargo.toml
@@ -39,7 +39,7 @@ default-features = false
 features = []
 
 [dependencies.indexmap]
-version = "2.5.0"
+version = "2.6.0"
 default-features = false
 features = ["serde"]