diff --git a/Cargo.lock b/Cargo.lock
index 950f3388..31909ed8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1933,6 +1933,12 @@ dependencies = [
  "allocator-api2",
 ]
 
+[[package]]
+name = "hashbrown"
+version = "0.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e087f84d4f86bf4b218b927129862374b72199ae7d8657835f1e89000eea4fb"
+
 [[package]]
 name = "hashlink"
 version = "0.9.1"
@@ -2177,12 +2183,12 @@ checksum = "206ca75c9c03ba3d4ace2460e57b189f39f43de612c2f85836e65c929701bb2d"
 
 [[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",
 ]
 
diff --git a/Cargo.toml b/Cargo.toml
index 34cb5b75..58a8a388 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -47,7 +47,7 @@ env_logger = "0.11"
 flate2 = "1.0"
 futures = "0.3"
 hgvs = "0.17.3"
-indexmap = { version = "2.5", features = ["serde"] }
+indexmap = { version = "2.6", features = ["serde"] }
 indicatif = { version = "0.17", features = ["rayon"] }
 itertools = "0.13"
 jsonl = "4.0"