diff --git a/Cargo.lock b/Cargo.lock
index 000969d..ae311d2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1133,6 +1133,12 @@ dependencies = [
  "allocator-api2",
 ]
 
+[[package]]
+name = "hashbrown"
+version = "0.15.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3a9bfc1af68b1726ea47d3d5109de126281def866b33970e10fbab11b5dafab3"
+
 [[package]]
 name = "heck"
 version = "0.4.1"
@@ -1320,12 +1326,12 @@ 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",
+ "hashbrown 0.15.1",
  "serde",
 ]
 
@@ -1543,7 +1549,7 @@ version = "0.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a4a83fb7698b3643a0e34f9ae6f2e8f0178c0fd42f8b59d493aa271ff3a5bf21"
 dependencies = [
- "hashbrown",
+ "hashbrown 0.14.3",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index 85a23c0..0cea600 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -21,7 +21,7 @@ fastobo = "0.15.2"
 fastrand = "2.1"
 flate2 = "1.0"
 hpo = "0.8"
-indexmap = { version = "2.5", features = ["serde"] }
+indexmap = { version = "2.6", features = ["serde"] }
 indicatif = { version = "0.17", features = ["rayon"] }
 itertools = "0.13"
 lazy_static = "1.5"