diff --git a/Cargo.lock b/Cargo.lock
index 06bf4a4..f1bea6d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -403,21 +403,11 @@ checksum = "b35204fbdc0b3f4446b89fc1ac2cf84a8a68971995d0bf2e925ec7cd960f9cb3"
 
 [[package]]
 name = "bzip2"
-version = "0.5.2"
+version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "49ecfb22d906f800d4fe833b6282cf4dc1c298f5057ca0b5445e5c209735ca47"
+checksum = "f3a53fac24f34a81bc9954b5d6cfce0c21e18ec6959f44f56e8e90e4bb7c346c"
 dependencies = [
- "bzip2-sys",
-]
-
-[[package]]
-name = "bzip2-sys"
-version = "0.1.13+1.0.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "225bff33b2141874fe80d71e07d6eec4f85c5c216453dd96388240f96e1acc14"
-dependencies = [
- "cc",
- "pkg-config",
+ "libbz2-rs-sys",
 ]
 
 [[package]]
@@ -1020,6 +1010,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bfe33edd8e85a12a67454e37f8c75e730830d83e313556ab9ebf9ee7fbeb3bfb"
 dependencies = [
  "crc32fast",
+ "libz-rs-sys",
  "miniz_oxide",
 ]
 
@@ -1201,11 +1192,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "899def5c37c4fd7b2664648c28120ecec138e4d395b459e5ca34f9cce2dd77fd"
 dependencies = [
  "cfg-if",
- "js-sys",
  "libc",
  "r-efi",
  "wasip2",
- "wasm-bindgen",
 ]
 
 [[package]]
@@ -1986,6 +1975,12 @@ dependencies = [
  "spin",
 ]
 
+[[package]]
+name = "libbz2-rs-sys"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2c4a545a15244c7d945065b5d392b2d2d7f21526fba56ce51467b06ed445e8f7"
+
 [[package]]
 name = "libc"
 version = "0.2.177"
@@ -2020,6 +2015,15 @@ dependencies = [
  "vcpkg",
 ]
 
+[[package]]
+name = "libz-rs-sys"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "840db8cf39d9ec4dd794376f38acc40d0fc65eec2a8f484f7fd375b84602becd"
+dependencies = [
+ "zlib-rs",
+]
+
 [[package]]
 name = "linux-raw-sys"
 version = "0.11.0"
@@ -2054,24 +2058,13 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "34080505efa8e45a4b816c349525ebe327ceaa8559756f0356cba97ef3bf7432"
 
 [[package]]
-name = "lzma-rs"
-version = "0.3.0"
+name = "lzma-rust2"
+version = "0.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "297e814c836ae64db86b36cf2a557ba54368d03f6afcd7d947c266692f71115e"
+checksum = "c60a23ffb90d527e23192f1246b14746e2f7f071cb84476dd879071696c18a4a"
 dependencies = [
- "byteorder",
  "crc",
-]
-
-[[package]]
-name = "lzma-sys"
-version = "0.1.20"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5fda04ab3764e6cde78b9974eec4f779acaba7c4e84b36eca3cf77c581b85d27"
-dependencies = [
- "cc",
- "libc",
- "pkg-config",
+ "sha2",
 ]
 
 [[package]]
@@ -2428,6 +2421,12 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "439ee305def115ba05938db6eb1644ff94165c5ab5e9420d1c1bcedbba909391"
 
+[[package]]
+name = "ppmd-rust"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d558c559f0450f16f2a27a1f017ef38468c1090c9ce63c8e51366232d53717b4"
+
 [[package]]
 name = "ppv-lite86"
 version = "0.2.21"
@@ -4283,15 +4282,6 @@ version = "0.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9edde0db4769d2dc68579893f2306b26c6ecfbe0ef499b013d731b7b9247e0b9"
 
-[[package]]
-name = "xz2"
-version = "0.1.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "388c44dc09d76f1536602ead6d325eb532f5c122f17782bd57fb47baeeb767e2"
-dependencies = [
- "lzma-sys",
-]
-
 [[package]]
 name = "yansi"
 version = "1.0.1"
@@ -4417,34 +4407,37 @@ dependencies = [
 
 [[package]]
 name = "zip"
-version = "2.4.2"
+version = "6.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fabe6324e908f85a1c52063ce7aa26b68dcb7eb6dbc83a2d148403c9bc3eba50"
+checksum = "eb2a05c7c36fde6c09b08576c9f7fb4cda705990f73b58fe011abf7dfb24168b"
 dependencies = [
  "aes",
  "arbitrary",
  "bzip2",
  "constant_time_eq",
  "crc32fast",
- "crossbeam-utils",
  "deflate64",
- "displaydoc",
  "flate2",
  "getrandom 0.3.4",
  "hmac",
  "indexmap",
- "lzma-rs",
+ "lzma-rust2",
  "memchr",
  "pbkdf2",
+ "ppmd-rust",
  "sha1",
- "thiserror 2.0.17",
  "time",
- "xz2",
  "zeroize",
  "zopfli",
  "zstd",
 ]
 
+[[package]]
+name = "zlib-rs"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2f06ae92f42f5e5c42443fd094f245eb656abf56dd7cce9b8b263236565e00f2"
+
 [[package]]
 name = "zopfli"
 version = "0.8.3"
diff --git a/crates/impulse-file/Cargo.toml b/crates/impulse-file/Cargo.toml
index 2aa4136..53e0e6a 100644
--- a/crates/impulse-file/Cargo.toml
+++ b/crates/impulse-file/Cargo.toml
@@ -17,7 +17,7 @@ serde = { workspace = true }
 chrono = { workspace = true }
 
 # File handling
-zip = "2.2"
+zip = "6.0"
 wildmatch = "2.3"
 
 # Upload functionality
diff --git a/crates/impulse-message/Cargo.toml b/crates/impulse-message/Cargo.toml
index 4f23a0c..e8143ed 100644
--- a/crates/impulse-message/Cargo.toml
+++ b/crates/impulse-message/Cargo.toml
@@ -16,7 +16,7 @@ thiserror = { workspace = true }
 serde = { workspace = true }
 chrono = { workspace = true }
 unicode-width = "0.2"
-zip = "2.2"  # QWK packet compression
+zip = "6.0"  # QWK packet compression
 csv = "1.3"  # CSV export support
 serde_json = "1.0"  # JSON serialization