diff --git a/Cargo.lock b/Cargo.lock
index ac0cae130..96acc8455 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -103,6 +103,7 @@ dependencies = [
  "tokio",
  "tokio-util",
  "unic-langid",
+ "unic-ucd-category",
  "unicase",
  "unicode-normalization",
  "utime",
@@ -2610,6 +2611,27 @@ version = "1.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "879f6906492a7cd215bfa4cf595b600146ccfac0c79bcbd1f3000162af5e8b06"
 
+[[package]]
+name = "unic-char-property"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a8c57a407d9b6fa02b4795eb81c5b6652060a15a7903ea981f3d723e6c0be221"
+dependencies = [
+ "unic-char-range",
+]
+
+[[package]]
+name = "unic-char-range"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0398022d5f700414f6b899e10b8348231abf9173fa93144cbc1a43b9793c1fbc"
+
+[[package]]
+name = "unic-common"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "80d7ff825a6a654ee85a63e80f92f054f904f21e7d12da4e22f9834a4aaa35bc"
+
 [[package]]
 name = "unic-langid"
 version = "0.9.0"
@@ -2653,6 +2675,27 @@ dependencies = [
  "unic-langid-impl",
 ]
 
+[[package]]
+name = "unic-ucd-category"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b8d4591f5fcfe1bd4453baaf803c40e1b1e69ff8455c47620440b46efef91c0"
+dependencies = [
+ "matches",
+ "unic-char-property",
+ "unic-char-range",
+ "unic-ucd-version",
+]
+
+[[package]]
+name = "unic-ucd-version"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "96bd2f2237fe450fcd0a1d2f5f4e91711124f7857ba2e964247776ebeeb7b0c4"
+dependencies = [
+ "unic-common",
+]
+
 [[package]]
 name = "unicase"
 version = "2.6.0"
diff --git a/Cargo.toml b/Cargo.toml
index 80e6e0439..2bbe4b86a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -39,3 +39,9 @@ compile_data_attr = "glob([\"src/**/*.der\"])"
 
 [package.metadata.raze.crates.webpki.'*']
 compile_data_attr = "glob([\"src/**/*.der\"])"
+
+[package.metadata.raze.crates.unic-ucd-version.'*']
+compile_data_attr = "glob([\"**/*.rsv\"])"
+
+[package.metadata.raze.crates.unic-ucd-category.'*']
+compile_data_attr = "glob([\"**/*.rsv\"])"
diff --git a/cargo/crates.bzl b/cargo/crates.bzl
index 72f7896d9..e4e255bec 100644
--- a/cargo/crates.bzl
+++ b/cargo/crates.bzl
@@ -2611,6 +2611,36 @@ def raze_fetch_remote_crates():
         build_file = Label("//cargo/remote:BUILD.typenum-1.13.0.bazel"),
     )
 
+    maybe(
+        http_archive,
+        name = "raze__unic_char_property__0_9_0",
+        url = "https://crates.io/api/v1/crates/unic-char-property/0.9.0/download",
+        type = "tar.gz",
+        sha256 = "a8c57a407d9b6fa02b4795eb81c5b6652060a15a7903ea981f3d723e6c0be221",
+        strip_prefix = "unic-char-property-0.9.0",
+        build_file = Label("//cargo/remote:BUILD.unic-char-property-0.9.0.bazel"),
+    )
+
+    maybe(
+        http_archive,
+        name = "raze__unic_char_range__0_9_0",
+        url = "https://crates.io/api/v1/crates/unic-char-range/0.9.0/download",
+        type = "tar.gz",
+        sha256 = "0398022d5f700414f6b899e10b8348231abf9173fa93144cbc1a43b9793c1fbc",
+        strip_prefix = "unic-char-range-0.9.0",
+        build_file = Label("//cargo/remote:BUILD.unic-char-range-0.9.0.bazel"),
+    )
+
+    maybe(
+        http_archive,
+        name = "raze__unic_common__0_9_0",
+        url = "https://crates.io/api/v1/crates/unic-common/0.9.0/download",
+        type = "tar.gz",
+        sha256 = "80d7ff825a6a654ee85a63e80f92f054f904f21e7d12da4e22f9834a4aaa35bc",
+        strip_prefix = "unic-common-0.9.0",
+        build_file = Label("//cargo/remote:BUILD.unic-common-0.9.0.bazel"),
+    )
+
     maybe(
         http_archive,
         name = "raze__unic_langid__0_9_0",
@@ -2651,6 +2681,26 @@ def raze_fetch_remote_crates():
         build_file = Label("//cargo/remote:BUILD.unic-langid-macros-impl-0.9.0.bazel"),
     )
 
+    maybe(
+        http_archive,
+        name = "raze__unic_ucd_category__0_9_0",
+        url = "https://crates.io/api/v1/crates/unic-ucd-category/0.9.0/download",
+        type = "tar.gz",
+        sha256 = "1b8d4591f5fcfe1bd4453baaf803c40e1b1e69ff8455c47620440b46efef91c0",
+        strip_prefix = "unic-ucd-category-0.9.0",
+        build_file = Label("//cargo/remote:BUILD.unic-ucd-category-0.9.0.bazel"),
+    )
+
+    maybe(
+        http_archive,
+        name = "raze__unic_ucd_version__0_9_0",
+        url = "https://crates.io/api/v1/crates/unic-ucd-version/0.9.0/download",
+        type = "tar.gz",
+        sha256 = "96bd2f2237fe450fcd0a1d2f5f4e91711124f7857ba2e964247776ebeeb7b0c4",
+        strip_prefix = "unic-ucd-version-0.9.0",
+        build_file = Label("//cargo/remote:BUILD.unic-ucd-version-0.9.0.bazel"),
+    )
+
     maybe(
         http_archive,
         name = "raze__unicase__2_6_0",
diff --git a/cargo/licenses.json b/cargo/licenses.json
index 87bfdb506..3ac309e3f 100644
--- a/cargo/licenses.json
+++ b/cargo/licenses.json
@@ -2375,6 +2375,33 @@
     "license_file": null,
     "description": "Typenum is a Rust library for type-level numbers evaluated at     compile time. It currently supports bits, unsigned integers, and signed     integers. It also provides a type-level array of type-level numbers, but its     implementation is incomplete."
   },
+  {
+    "name": "unic-char-property",
+    "version": "0.9.0",
+    "authors": "The UNIC Project Developers",
+    "repository": "https://github.com/open-i18n/rust-unic/",
+    "license": "Apache-2.0 OR MIT",
+    "license_file": null,
+    "description": "UNIC — Unicode Character Tools — Character Property taxonomy, contracts and build macros"
+  },
+  {
+    "name": "unic-char-range",
+    "version": "0.9.0",
+    "authors": "The UNIC Project Developers",
+    "repository": "https://github.com/open-i18n/rust-unic/",
+    "license": "Apache-2.0 OR MIT",
+    "license_file": null,
+    "description": "UNIC — Unicode Character Tools — Character Range and Iteration"
+  },
+  {
+    "name": "unic-common",
+    "version": "0.9.0",
+    "authors": "The UNIC Project Developers",
+    "repository": "https://github.com/open-i18n/rust-unic/",
+    "license": "Apache-2.0 OR MIT",
+    "license_file": null,
+    "description": "UNIC — Common Utilities"
+  },
   {
     "name": "unic-langid",
     "version": "0.9.0",
@@ -2411,6 +2438,24 @@
     "license_file": null,
     "description": "API for managing Unicode Language Identifiers"
   },
+  {
+    "name": "unic-ucd-category",
+    "version": "0.9.0",
+    "authors": "The UNIC Project Developers",
+    "repository": "https://github.com/open-i18n/rust-unic/",
+    "license": "Apache-2.0 OR MIT",
+    "license_file": null,
+    "description": "UNIC — Unicode Character Database — General Category"
+  },
+  {
+    "name": "unic-ucd-version",
+    "version": "0.9.0",
+    "authors": "The UNIC Project Developers",
+    "repository": "https://github.com/open-i18n/rust-unic/",
+    "license": "Apache-2.0 OR MIT",
+    "license_file": null,
+    "description": "UNIC — Unicode Character Database — Version"
+  },
   {
     "name": "unicase",
     "version": "2.6.0",
diff --git a/cargo/remote/BUILD.unic-char-property-0.9.0.bazel b/cargo/remote/BUILD.unic-char-property-0.9.0.bazel
new file mode 100644
index 000000000..cabf4cf80
--- /dev/null
+++ b/cargo/remote/BUILD.unic-char-property-0.9.0.bazel
@@ -0,0 +1,60 @@
+"""
+@generated
+cargo-raze crate build file.
+
+DO NOT EDIT! Replaced on runs of cargo-raze
+"""
+
+# buildifier: disable=load
+load("@bazel_skylib//lib:selects.bzl", "selects")
+
+# buildifier: disable=load
+load(
+    "@rules_rust//rust:rust.bzl",
+    "rust_binary",
+    "rust_library",
+    "rust_test",
+)
+
+package(default_visibility = [
+    # Public for visibility by "@raze__crate__version//" targets.
+    #
+    # Prefer access through "//cargo", which limits external
+    # visibility to explicit Cargo.toml dependencies.
+    "//visibility:public",
+])
+
+licenses([
+    "notice",  # MIT from expression "MIT OR Apache-2.0"
+])
+
+# Generated Targets
+
+rust_library(
+    name = "unic_char_property",
+    srcs = glob(["**/*.rs"]),
+    crate_features = [
+    ],
+    crate_root = "src/lib.rs",
+    crate_type = "lib",
+    data = [],
+    edition = "2018",
+    rustc_flags = [
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-raze",
+        "manual",
+    ],
+    version = "0.9.0",
+    # buildifier: leave-alone
+    deps = [
+        "@raze__unic_char_range__0_9_0//:unic_char_range",
+    ],
+)
+
+# Unsupported target "bool_property_macro" with type "test" omitted
+
+# Unsupported target "enum_property_macro" with type "test" omitted
+
+# Unsupported target "tables_tests" with type "test" omitted
diff --git a/cargo/remote/BUILD.unic-char-range-0.9.0.bazel b/cargo/remote/BUILD.unic-char-range-0.9.0.bazel
new file mode 100644
index 000000000..b3007bf37
--- /dev/null
+++ b/cargo/remote/BUILD.unic-char-range-0.9.0.bazel
@@ -0,0 +1,60 @@
+"""
+@generated
+cargo-raze crate build file.
+
+DO NOT EDIT! Replaced on runs of cargo-raze
+"""
+
+# buildifier: disable=load
+load("@bazel_skylib//lib:selects.bzl", "selects")
+
+# buildifier: disable=load
+load(
+    "@rules_rust//rust:rust.bzl",
+    "rust_binary",
+    "rust_library",
+    "rust_test",
+)
+
+package(default_visibility = [
+    # Public for visibility by "@raze__crate__version//" targets.
+    #
+    # Prefer access through "//cargo", which limits external
+    # visibility to explicit Cargo.toml dependencies.
+    "//visibility:public",
+])
+
+licenses([
+    "notice",  # MIT from expression "MIT OR Apache-2.0"
+])
+
+# Generated Targets
+
+# Unsupported target "benchmarks" with type "bench" omitted
+
+# Unsupported target "macro_use_std_tests" with type "example" omitted
+
+rust_library(
+    name = "unic_char_range",
+    srcs = glob(["**/*.rs"]),
+    crate_features = [
+        "default",
+    ],
+    crate_root = "src/lib.rs",
+    crate_type = "lib",
+    data = [],
+    edition = "2018",
+    rustc_flags = [
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-raze",
+        "manual",
+    ],
+    version = "0.9.0",
+    # buildifier: leave-alone
+    deps = [
+    ],
+)
+
+# Unsupported target "iter_tests" with type "test" omitted
diff --git a/cargo/remote/BUILD.unic-common-0.9.0.bazel b/cargo/remote/BUILD.unic-common-0.9.0.bazel
new file mode 100644
index 000000000..ba7a3b0f3
--- /dev/null
+++ b/cargo/remote/BUILD.unic-common-0.9.0.bazel
@@ -0,0 +1,54 @@
+"""
+@generated
+cargo-raze crate build file.
+
+DO NOT EDIT! Replaced on runs of cargo-raze
+"""
+
+# buildifier: disable=load
+load("@bazel_skylib//lib:selects.bzl", "selects")
+
+# buildifier: disable=load
+load(
+    "@rules_rust//rust:rust.bzl",
+    "rust_binary",
+    "rust_library",
+    "rust_test",
+)
+
+package(default_visibility = [
+    # Public for visibility by "@raze__crate__version//" targets.
+    #
+    # Prefer access through "//cargo", which limits external
+    # visibility to explicit Cargo.toml dependencies.
+    "//visibility:public",
+])
+
+licenses([
+    "notice",  # MIT from expression "MIT OR Apache-2.0"
+])
+
+# Generated Targets
+
+rust_library(
+    name = "unic_common",
+    srcs = glob(["**/*.rs"]),
+    crate_features = [
+        "default",
+    ],
+    crate_root = "src/lib.rs",
+    crate_type = "lib",
+    data = [],
+    edition = "2018",
+    rustc_flags = [
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-raze",
+        "manual",
+    ],
+    version = "0.9.0",
+    # buildifier: leave-alone
+    deps = [
+    ],
+)
diff --git a/cargo/remote/BUILD.unic-ucd-category-0.9.0.bazel b/cargo/remote/BUILD.unic-ucd-category-0.9.0.bazel
new file mode 100644
index 000000000..2294f570b
--- /dev/null
+++ b/cargo/remote/BUILD.unic-ucd-category-0.9.0.bazel
@@ -0,0 +1,64 @@
+"""
+@generated
+cargo-raze crate build file.
+
+DO NOT EDIT! Replaced on runs of cargo-raze
+"""
+
+# buildifier: disable=load
+load("@bazel_skylib//lib:selects.bzl", "selects")
+
+# buildifier: disable=load
+load(
+    "@rules_rust//rust:rust.bzl",
+    "rust_binary",
+    "rust_library",
+    "rust_test",
+)
+
+package(default_visibility = [
+    # Public for visibility by "@raze__crate__version//" targets.
+    #
+    # Prefer access through "//cargo", which limits external
+    # visibility to explicit Cargo.toml dependencies.
+    "//visibility:public",
+])
+
+licenses([
+    "notice",  # MIT from expression "MIT OR Apache-2.0"
+])
+
+# Generated Targets
+
+rust_library(
+    name = "unic_ucd_category",
+    srcs = glob(["**/*.rs"]),
+    crate_features = [
+    ],
+    crate_root = "src/lib.rs",
+    crate_type = "lib",
+    data = [],
+    compile_data = glob(["**/*.rsv"]),
+    edition = "2018",
+    rustc_flags = [
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-raze",
+        "manual",
+    ],
+    version = "0.9.0",
+    # buildifier: leave-alone
+    deps = [
+        "@raze__matches__0_1_8//:matches",
+        "@raze__unic_char_property__0_9_0//:unic_char_property",
+        "@raze__unic_char_range__0_9_0//:unic_char_range",
+        "@raze__unic_ucd_version__0_9_0//:unic_ucd_version",
+    ],
+)
+
+# Unsupported target "basic_tests" with type "test" omitted
+
+# Unsupported target "major_category_tests" with type "test" omitted
+
+# Unsupported target "unicode_version_tests" with type "test" omitted
diff --git a/cargo/remote/BUILD.unic-ucd-version-0.9.0.bazel b/cargo/remote/BUILD.unic-ucd-version-0.9.0.bazel
new file mode 100644
index 000000000..bf7657dc9
--- /dev/null
+++ b/cargo/remote/BUILD.unic-ucd-version-0.9.0.bazel
@@ -0,0 +1,57 @@
+"""
+@generated
+cargo-raze crate build file.
+
+DO NOT EDIT! Replaced on runs of cargo-raze
+"""
+
+# buildifier: disable=load
+load("@bazel_skylib//lib:selects.bzl", "selects")
+
+# buildifier: disable=load
+load(
+    "@rules_rust//rust:rust.bzl",
+    "rust_binary",
+    "rust_library",
+    "rust_test",
+)
+
+package(default_visibility = [
+    # Public for visibility by "@raze__crate__version//" targets.
+    #
+    # Prefer access through "//cargo", which limits external
+    # visibility to explicit Cargo.toml dependencies.
+    "//visibility:public",
+])
+
+licenses([
+    "notice",  # MIT from expression "MIT OR Apache-2.0"
+])
+
+# Generated Targets
+
+rust_library(
+    name = "unic_ucd_version",
+    srcs = glob(["**/*.rs"]),
+    crate_features = [
+    ],
+    crate_root = "src/lib.rs",
+    crate_type = "lib",
+    data = [],
+    compile_data = glob(["**/*.rsv"]),
+    edition = "2018",
+    rustc_flags = [
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-raze",
+        "manual",
+    ],
+    version = "0.9.0",
+    # buildifier: leave-alone
+    deps = [
+        "@raze__unic_common__0_9_0//:unic_common",
+    ],
+)
+
+# Unsupported target "basic_tests" with type "test" omitted
diff --git a/rslib/BUILD.bazel b/rslib/BUILD.bazel
index 857f64aa3..aca98dff7 100644
--- a/rslib/BUILD.bazel
+++ b/rslib/BUILD.bazel
@@ -114,6 +114,7 @@ rust_library(
         "//rslib/cargo:unic_langid",
         "//rslib/cargo:unicase",
         "//rslib/cargo:unicode_normalization",
+        "//rslib/cargo:unic_ucd_category",
         "//rslib/cargo:utime",
         "//rslib/cargo:zip",
         "//rslib/cargo:pct_str",
diff --git a/rslib/Cargo.toml b/rslib/Cargo.toml
index 07fa4c894..09b86a38d 100644
--- a/rslib/Cargo.toml
+++ b/rslib/Cargo.toml
@@ -93,3 +93,4 @@ fnv = "1.0.7"
 strum = { version = "0.21.0", features = ["derive"] }
 tokio-util = { version = "0.6.7", features = ["io"] }
 pct-str = { git="https://github.com/timothee-haudebourg/pct-str.git", rev="4adccd8d4a222ab2672350a102f06ae832a0572d" }
+unic-ucd-category = "0.9.0"
diff --git a/rslib/cargo/BUILD.bazel b/rslib/cargo/BUILD.bazel
index 6377a3531..b53ccca99 100644
--- a/rslib/cargo/BUILD.bazel
+++ b/rslib/cargo/BUILD.bazel
@@ -453,6 +453,15 @@ alias(
     ],
 )
 
+alias(
+    name = "unic_ucd_category",
+    actual = "@raze__unic_ucd_category__0_9_0//:unic_ucd_category",
+    tags = [
+        "cargo-raze",
+        "manual",
+    ],
+)
+
 alias(
     name = "unicase",
     actual = "@raze__unicase__2_6_0//:unicase",
diff --git a/rslib/src/media/files.rs b/rslib/src/media/files.rs
index f317482eb..031b1bb39 100644
--- a/rslib/src/media/files.rs
+++ b/rslib/src/media/files.rs
@@ -12,6 +12,7 @@ use std::{
 use lazy_static::lazy_static;
 use regex::Regex;
 use sha1::Sha1;
+use unic_ucd_category::GeneralCategory;
 use unicode_normalization::{is_nfc, UnicodeNormalization};
 
 use crate::{
@@ -70,6 +71,8 @@ fn disallowed_char(char: char) -> bool {
     match char {
         '[' | ']' | '<' | '>' | ':' | '"' | '/' | '?' | '*' | '^' | '\\' | '|' => true,
         c if c.is_ascii_control() => true,
+        // Macs do not allow invalid Unicode characters like 05F8 to be in a filename.
+        c if GeneralCategory::of(c) == GeneralCategory::Unassigned => true,
         _ => false,
     }
 }