diff --git a/Cargo.lock b/Cargo.lock
index 27e2b2af8..88b87879a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1007,9 +1007,9 @@ dependencies = [
 
 [[package]]
 name = "fluent"
-version = "0.16.1"
+version = "0.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bb74634707bebd0ce645a981148e8fb8c7bccd4c33c652aeffd28bf2f96d555a"
+checksum = "8137a6d5a2c50d6b0ebfcb9aaa91a28154e0a70605f112d30cb0cd4a78670477"
 dependencies = [
  "fluent-bundle",
  "unic-langid",
@@ -1017,16 +1017,16 @@ dependencies = [
 
 [[package]]
 name = "fluent-bundle"
-version = "0.15.3"
+version = "0.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7fe0a21ee80050c678013f82edf4b705fe2f26f1f9877593d13198612503f493"
+checksum = "01203cb8918f5711e73891b347816d932046f95f54207710bda99beaeb423bf4"
 dependencies = [
  "fluent-langneg",
  "fluent-syntax",
  "intl-memoizer",
  "intl_pluralrules",
- "rustc-hash 1.1.0",
- "self_cell 0.10.3",
+ "rustc-hash 2.1.1",
+ "self_cell",
  "smallvec",
  "unic-langid",
 ]
@@ -1042,11 +1042,12 @@ dependencies = [
 
 [[package]]
 name = "fluent-syntax"
-version = "0.11.1"
+version = "0.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2a530c4694a6a8d528794ee9bbd8ba0122e779629ac908d15ad5a7ae7763a33d"
+checksum = "54f0d287c53ffd184d04d8677f590f4ac5379785529e5e08b1c8083acdd5c198"
 dependencies = [
- "thiserror 1.0.69",
+ "memchr",
+ "thiserror 2.0.12",
 ]
 
 [[package]]
@@ -1299,9 +1300,9 @@ dependencies = [
 
 [[package]]
 name = "intl-memoizer"
-version = "0.5.2"
+version = "0.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fe22e020fce238ae18a6d5d8c502ee76a52a6e880d99477657e6acc30ec57bda"
+checksum = "310da2e345f5eb861e7a07ee182262e94975051db9e4223e909ba90f392f163f"
 dependencies = [
  "type-map",
  "unic-langid",
@@ -2191,15 +2192,6 @@ version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
 
-[[package]]
-name = "self_cell"
-version = "0.10.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e14e4d63b804dc0c7ec4a1e52bcb63f02c7ac94476755aa579edac21e01f915d"
-dependencies = [
- "self_cell 1.2.0",
-]
-
 [[package]]
 name = "self_cell"
 version = "1.2.0"
@@ -3404,7 +3396,7 @@ dependencies = [
  "nix",
  "rand 0.9.1",
  "rayon",
- "self_cell 1.2.0",
+ "self_cell",
  "tempfile",
  "thiserror 2.0.12",
  "unicode-width 0.2.0",
diff --git a/Cargo.toml b/Cargo.toml
index 260d458d1..c271c6caf 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -363,8 +363,8 @@ crc32fast = "1.4.2"
 digest = "0.10.7"
 
 # Fluent dependencies
-fluent-bundle = "0.15.3"
-fluent = "0.16.1"
+fluent-bundle = "0.16.0"
+fluent = "0.17.0"
 unic-langid = "0.9.6"
 
 uucore = { version = "0.0.30", package = "uucore", path = "src/uucore" }
diff --git a/deny.toml b/deny.toml
index 6a4b1dd76..0881a09f3 100644
--- a/deny.toml
+++ b/deny.toml
@@ -86,8 +86,6 @@ skip = [
   { name = "itertools", version = "0.13.0" },
   # fluent-bundle
   { name = "rustc-hash", version = "1.1.0" },
-  # fluent-bundle
-  { name = "self_cell", version = "0.10.3" },
   # ordered-multimap
   { name = "hashbrown", version = "0.14.5" },
   # cexpr (via bindgen)
diff --git a/fuzz/Cargo.lock b/fuzz/Cargo.lock
index c48d6aa56..44e69cb0c 100644
--- a/fuzz/Cargo.lock
+++ b/fuzz/Cargo.lock
@@ -492,9 +492,9 @@ checksum = "37909eebbb50d72f9059c3b6d82c0463f2ff062c9e95845c43a6c9c0355411be"
 
 [[package]]
 name = "fluent"
-version = "0.16.1"
+version = "0.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bb74634707bebd0ce645a981148e8fb8c7bccd4c33c652aeffd28bf2f96d555a"
+checksum = "8137a6d5a2c50d6b0ebfcb9aaa91a28154e0a70605f112d30cb0cd4a78670477"
 dependencies = [
  "fluent-bundle",
  "unic-langid",
@@ -502,16 +502,16 @@ dependencies = [
 
 [[package]]
 name = "fluent-bundle"
-version = "0.15.3"
+version = "0.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7fe0a21ee80050c678013f82edf4b705fe2f26f1f9877593d13198612503f493"
+checksum = "01203cb8918f5711e73891b347816d932046f95f54207710bda99beaeb423bf4"
 dependencies = [
  "fluent-langneg",
  "fluent-syntax",
  "intl-memoizer",
  "intl_pluralrules",
- "rustc-hash",
- "self_cell 0.10.3",
+ "rustc-hash 2.1.1",
+ "self_cell",
  "smallvec",
  "unic-langid",
 ]
@@ -527,11 +527,12 @@ dependencies = [
 
 [[package]]
 name = "fluent-syntax"
-version = "0.11.1"
+version = "0.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2a530c4694a6a8d528794ee9bbd8ba0122e779629ac908d15ad5a7ae7763a33d"
+checksum = "54f0d287c53ffd184d04d8677f590f4ac5379785529e5e08b1c8083acdd5c198"
 dependencies = [
- "thiserror 1.0.69",
+ "memchr",
+ "thiserror",
 ]
 
 [[package]]
@@ -617,9 +618,9 @@ dependencies = [
 
 [[package]]
 name = "intl-memoizer"
-version = "0.5.2"
+version = "0.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fe22e020fce238ae18a6d5d8c502ee76a52a6e880d99477657e6acc30ec57bda"
+checksum = "310da2e345f5eb861e7a07ee182262e94975051db9e4223e909ba90f392f163f"
 dependencies = [
  "type-map",
  "unic-langid",
@@ -1043,6 +1044,12 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "08d43f7aa6b08d49f382cde6a7982047c3426db949b1424bc4b7ec9ae12c6ce2"
 
+[[package]]
+name = "rustc-hash"
+version = "2.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "357703d41365b4b27c590e3ed91eabb1b663f07c4c084095e60cbed4362dff0d"
+
 [[package]]
 name = "rustix"
 version = "1.0.7"
@@ -1062,15 +1069,6 @@ version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "eded382c5f5f786b989652c49544c4877d9f015cc22e145a5ea8ea66c2921cd2"
 
-[[package]]
-name = "self_cell"
-version = "0.10.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e14e4d63b804dc0c7ec4a1e52bcb63f02c7ac94476755aa579edac21e01f915d"
-dependencies = [
- "self_cell 1.2.0",
-]
-
 [[package]]
 name = "self_cell"
 version = "1.2.0"
@@ -1202,33 +1200,13 @@ dependencies = [
  "windows-sys",
 ]
 
-[[package]]
-name = "thiserror"
-version = "1.0.69"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b6aaf5339b578ea85b50e080feb250a3e8ae8cfcdff9a461c9ec2904bc923f52"
-dependencies = [
- "thiserror-impl 1.0.69",
-]
-
 [[package]]
 name = "thiserror"
 version = "2.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "567b8a2dae586314f7be2a752ec7474332959c6460e02bde30d702a66d488708"
 dependencies = [
- "thiserror-impl 2.0.12",
-]
-
-[[package]]
-name = "thiserror-impl"
-version = "1.0.69"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4fee6c4efc90059e10f81e6d42c60a18f76588c3d74cb83a0b242a2b6c7504c1"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
+ "thiserror-impl",
 ]
 
 [[package]]
@@ -1273,7 +1251,7 @@ version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "deb68604048ff8fa93347f02441e4487594adc20bb8a084f9e564d2b827a0a9f"
 dependencies = [
- "rustc-hash",
+ "rustc-hash 1.1.0",
 ]
 
 [[package]]
@@ -1365,7 +1343,7 @@ dependencies = [
  "clap",
  "nix",
  "rust-ini",
- "thiserror 2.0.12",
+ "thiserror",
  "uucore",
 ]
 
@@ -1377,7 +1355,7 @@ dependencies = [
  "num-bigint",
  "num-traits",
  "onig",
- "thiserror 2.0.12",
+ "thiserror",
  "uucore",
 ]
 
@@ -1397,7 +1375,7 @@ dependencies = [
  "clap",
  "num-bigint",
  "num-traits",
- "thiserror 2.0.12",
+ "thiserror",
  "uucore",
 ]
 
@@ -1415,9 +1393,9 @@ dependencies = [
  "nix",
  "rand 0.9.1",
  "rayon",
- "self_cell 1.2.0",
+ "self_cell",
  "tempfile",
- "thiserror 2.0.12",
+ "thiserror",
  "unicode-width",
  "uucore",
 ]
@@ -1428,7 +1406,7 @@ version = "0.0.30"
 dependencies = [
  "clap",
  "memchr",
- "thiserror 2.0.12",
+ "thiserror",
  "uucore",
 ]
 
@@ -1458,7 +1436,7 @@ dependencies = [
  "clap",
  "libc",
  "nix",
- "thiserror 2.0.12",
+ "thiserror",
  "unicode-width",
  "uucore",
 ]
@@ -1495,7 +1473,7 @@ dependencies = [
  "sha2",
  "sha3",
  "sm3",
- "thiserror 2.0.12",
+ "thiserror",
  "unic-langid",
  "uucore_procs",
  "wild",