diff --git a/Cargo.lock b/Cargo.lock
index f852881a..31d95d03 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -218,7 +218,7 @@ dependencies = [
 
 [[package]]
 name = "indexmap"
-version = "1.5.0"
+version = "1.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -363,7 +363,7 @@ dependencies = [
  "cloudflare-zlib 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "crc 1.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "image 0.23.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "indexmap 1.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "indexmap 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "itertools 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libdeflater 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.11 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -622,7 +622,7 @@ dependencies = [
 "checksum hashbrown 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)" = "e91b62f79061a0bc2e046024cb7ba44b08419ed238ecbd9adbd787434b9e8c25"
 "checksum hermit-abi 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)" = "3deed196b6e7f9e44a2ae8d94225d80302d81208b1bb673fd21fe634645c85a9"
 "checksum image 0.23.8 (registry+https://github.com/rust-lang/crates.io-index)" = "543904170510c1b5fb65140485d84de4a57fddb2ed685481e9020ce3d2c9f64c"
-"checksum indexmap 1.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5b88cd59ee5f71fea89a62248fc8f387d44400cefe05ef548466d61ced9029a7"
+"checksum indexmap 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "86b45e59b16c76b11bf9738fd5d38879d3bd28ad292d7b313608becb17ae2df9"
 "checksum itertools 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "284f18f85651fe11e8a991b2adb42cb078325c996ed026d994719efcfca1d54b"
 "checksum lazy_static 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)" = "76f033c7ad61445c5b347c7382dd1237847eb1bce590fe50365dcb33d546be73"
 "checksum lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
diff --git a/Cargo.toml b/Cargo.toml
index 4ee83739..479a0d6e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -36,7 +36,7 @@ itertools = "^0.9.0"
 zopfli = "^0.4.0"
 miniz_oxide = "0.4"
 rgb = "0.8.20"
-indexmap = { version = "1.5.0", features = ["rayon"] }
+indexmap = { version = "1.5.1", features = ["rayon"] }
 libdeflater = "0.5.0"
 log = "0.4.11"
 stderrlog = { version = "0.4.3", optional = true }