diff --git a/backend/Cargo.lock b/backend/Cargo.lock
index d9cea4e..f5cbc7c 100644
--- a/backend/Cargo.lock
+++ b/backend/Cargo.lock
@@ -23,7 +23,7 @@ version = "0.8.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e89da841a80418a9b391ebaea17f5c112ffaaa96f621d2c285b5174da76b9011"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "once_cell",
  "version_check",
  "zerocopy",
@@ -47,7 +47,7 @@ dependencies = [
  "axum",
  "axum-extra",
  "bytes",
- "cfg-if 1.0.0",
+ "cfg-if",
  "http",
  "indexmap",
  "schemars",
@@ -223,7 +223,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8d82cb332cdfaed17ae235a638438ac4d4839913cc2af585c3c6746e8f8bee1a"
 dependencies = [
  "addr2line",
- "cfg-if 1.0.0",
+ "cfg-if",
  "libc",
  "miniz_oxide",
  "object",
@@ -296,12 +296,6 @@ dependencies = [
  "shlex",
 ]
 
-[[package]]
-name = "cfg-if"
-version = "0.1.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
-
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
@@ -350,7 +344,7 @@ version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a06aeb73f470f66dcdbf7223caeebb85984942f22f1adb2a088cf9668146bbbc"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "wasm-bindgen",
 ]
 
@@ -494,7 +488,7 @@ version = "0.8.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "75030f3c4f45dafd7586dd6780965a8c7e8e285a5ecb86713e63a79c5b2766f3"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
 ]
 
 [[package]]
@@ -519,7 +513,7 @@ version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "136d1b5283a1ab77bd9257427ffd09d8667ced0570b6f938942bc7568ed5b943"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "home",
  "windows-sys 0.48.0",
 ]
@@ -683,7 +677,7 @@ version = "0.2.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c4567c8db10ae91089c99af84c68c38da3ec2f087c3f82960bcdbf3656b6f4d7"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "js-sys",
  "libc",
  "wasi",
@@ -1172,7 +1166,7 @@ version = "0.10.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d89e7ee0cfbedfc4da3340218492196241d89eefb6dab27de5df917a6d2e78cf"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "digest",
 ]
 
@@ -1182,12 +1176,6 @@ version = "2.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
 
-[[package]]
-name = "memory_units"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8452105ba047068f40ff7093dd1d9da90898e63dd61736462e9cdda6a90ad3c3"
-
 [[package]]
 name = "mime"
 version = "0.3.17"
@@ -1357,7 +1345,7 @@ version = "0.9.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1e401f977ab385c9e4e3ab30627d6f26d00e2c73eef317493c4ec6d468726cf8"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "libc",
  "redox_syscall",
  "smallvec",
@@ -1758,7 +1746,7 @@ version = "0.10.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e3bf829a2d51ab4a5ddf1352d8470c140cadc8301b2ae1789db023f01cedd6ba"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "cpufeatures",
  "digest",
 ]
@@ -1769,7 +1757,7 @@ version = "0.10.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "793db75ad2bcafc3ffa7c68b215fee268f537982cd901d132f89c6343f3a3dc8"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "cpufeatures",
  "digest",
 ]
@@ -2118,7 +2106,6 @@ dependencies = [
  "thiserror",
  "wasm-bindgen",
  "wasm-bindgen-test",
- "wee_alloc",
 ]
 
 [[package]]
@@ -2175,7 +2162,7 @@ version = "3.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "28cce251fcbc87fac86a866eeb0d6c2d536fc16d06f184bb61aeae11aa4cee0c"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "fastrand",
  "once_cell",
  "rustix",
@@ -2197,7 +2184,7 @@ version = "3.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "adcb7fd841cd518e279be3d5a3eb0636409487998a4aff22f3de87b81e88384f"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "proc-macro2",
  "quote",
  "syn",
@@ -2241,7 +2228,7 @@ version = "1.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8b9ef9bad013ada3808854ceac7b46812a6465ba368859a37e2100283d2d719c"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "once_cell",
 ]
 
@@ -2576,7 +2563,7 @@ version = "0.2.97"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d15e63b4482863c109d70a7b8706c1e364eb6ea449b201a76c5b89cedcec2d5c"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "once_cell",
  "wasm-bindgen-macro",
 ]
@@ -2602,7 +2589,7 @@ version = "0.4.47"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9dfaf8f50e5f293737ee323940c7d8b08a66a95a419223d9f41610ca08b0833d"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "js-sys",
  "once_cell",
  "wasm-bindgen",
@@ -2674,18 +2661,6 @@ dependencies = [
  "wasm-bindgen",
 ]
 
-[[package]]
-name = "wee_alloc"
-version = "0.4.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dbb3b5a6b2bb17cb6ad44a2e68a43e8d2722c997da10e928665c72ec6c0a0b8e"
-dependencies = [
- "cfg-if 0.1.10",
- "libc",
- "memory_units",
- "winapi",
-]
-
 [[package]]
 name = "whoami"
 version = "1.5.2"
diff --git a/backend/sync_lib/Cargo.toml b/backend/sync_lib/Cargo.toml
index 8fd2dfc..62d74a1 100644
--- a/backend/sync_lib/Cargo.toml
+++ b/backend/sync_lib/Cargo.toml
@@ -20,8 +20,6 @@ thiserror = { workspace = true }
 # code size when deploying.
 console_error_panic_hook = { version = "0.1.7", optional = true }
 
-wee_alloc = { version = "0.4.5", optional = true }
-
 [dev-dependencies]
 wasm-bindgen-test = "0.3.34"
 
diff --git a/backend/sync_lib/src/lib.rs b/backend/sync_lib/src/lib.rs
index 6719300..9832c5b 100644
--- a/backend/sync_lib/src/lib.rs
+++ b/backend/sync_lib/src/lib.rs
@@ -6,12 +6,6 @@ use wasm_bindgen::prelude::*;
 
 pub mod errors;
 
-// When the `wee_alloc` feature is enabled, use `wee_alloc` as the global
-// allocator.
-#[cfg(feature = "wee_alloc")]
-#[global_allocator]
-static ALLOC: wee_alloc::WeeAlloc<'_> = wee_alloc::WeeAlloc::INIT;
-
 #[wasm_bindgen(js_name = bytesToBase64)]
 pub fn bytes_to_base64(input: &[u8]) -> String { STANDARD_NO_PAD.encode(input) }
 
@@ -49,7 +43,7 @@ pub fn merge_text(parent: &str, left: &str, right: &str) -> String {
 }
 
 #[wasm_bindgen(js_name = isBinary)]
-pub fn is_binary(data: &[u8]) -> bool { data.iter().any(|&b| b == 0) }
+pub fn is_binary(data: &[u8]) -> bool { std::str::from_utf8(data).is_ok() }
 
 #[cfg(feature = "console_error_panic_hook")]
 #[wasm_bindgen(js_name = setPanicHook)]