diff --git a/Cargo.lock b/Cargo.lock
index d7d3e86..01df3ad 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -17,17 +17,6 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
 
-[[package]]
-name = "aes"
-version = "0.8.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b169f7a6d4742236a0a00c541b845991d0ac43e546831af1249753ab4c3aa3a0"
-dependencies = [
- "cfg-if",
- "cipher",
- "cpufeatures",
-]
-
 [[package]]
 name = "ahash"
 version = "0.8.8"
@@ -49,6 +38,21 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "alloc-no-stdlib"
+version = "2.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cc7bb162ec39d46ab1ca8c77bf72e890535becd1751bb45f64c597edb4c8c6b3"
+
+[[package]]
+name = "alloc-stdlib"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94fb8275041c72129eb51b7d0322c29b8387a0386127718b096429201a5d6ece"
+dependencies = [
+ "alloc-no-stdlib",
+]
+
 [[package]]
 name = "allocator-api2"
 version = "0.2.16"
@@ -239,12 +243,6 @@ version = "0.21.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9d297deb1925b89f2ccc13d7635fa0714f12c87adce1c75356b39ca9b7178567"
 
-[[package]]
-name = "base64ct"
-version = "1.6.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8c3c1a368f70d6cf7302d78f8f7093da241fb8e8807c05cc9e51a125895a6d5b"
-
 [[package]]
 name = "bitflags"
 version = "1.3.2"
@@ -265,7 +263,7 @@ checksum = "23285ad32269793932e830392f2fe2f83e26488fd3ec778883a93c8323735780"
 dependencies = [
  "arrayref",
  "arrayvec",
- "constant_time_eq 0.3.0",
+ "constant_time_eq",
 ]
 
 [[package]]
@@ -276,7 +274,7 @@ checksum = "94230421e395b9920d23df13ea5d77a20e1725331f90fbbf6df6040b33f756ae"
 dependencies = [
  "arrayref",
  "arrayvec",
- "constant_time_eq 0.3.0",
+ "constant_time_eq",
 ]
 
 [[package]]
@@ -289,7 +287,7 @@ dependencies = [
  "arrayvec",
  "cc",
  "cfg-if",
- "constant_time_eq 0.3.0",
+ "constant_time_eq",
 ]
 
 [[package]]
@@ -301,6 +299,27 @@ dependencies = [
  "generic-array",
 ]
 
+[[package]]
+name = "brotli"
+version = "3.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "516074a47ef4bce09577a3b379392300159ce5b1ba2e501ff1c819950066100f"
+dependencies = [
+ "alloc-no-stdlib",
+ "alloc-stdlib",
+ "brotli-decompressor",
+]
+
+[[package]]
+name = "brotli-decompressor"
+version = "2.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4e2e4afe60d7dd600fdd3de8d0f08c2b7ec039712e3b6137ff98b7004e82de4f"
+dependencies = [
+ "alloc-no-stdlib",
+ "alloc-stdlib",
+]
+
 [[package]]
 name = "bumpalo"
 version = "3.15.0"
@@ -319,34 +338,12 @@ version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a2bd12c1caf447e69cd4528f47f94d203fd2582878ecb9e9465484c4148a8223"
 
-[[package]]
-name = "bzip2"
-version = "0.4.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bdb116a6ef3f6c3698828873ad02c3014b3c85cadb88496095628e3ef1e347f8"
-dependencies = [
- "bzip2-sys",
- "libc",
-]
-
-[[package]]
-name = "bzip2-sys"
-version = "0.1.11+1.0.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "736a955f3fa7875102d57c82b8cac37ec45224a07fd32d58f9f7a186b6cd4cdc"
-dependencies = [
- "cc",
- "libc",
- "pkg-config",
-]
-
 [[package]]
 name = "cc"
 version = "1.0.83"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f1174fb0b6ec23863f8b971027804a42614e347eafb0a95bf0b12cdae21fc4d0"
 dependencies = [
- "jobserver",
  "libc",
 ]
 
@@ -375,16 +372,6 @@ dependencies = [
  "unsigned-varint",
 ]
 
-[[package]]
-name = "cipher"
-version = "0.4.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "773f3b9af64447d2ce9850330c473515014aa235e6a783b02db81ff39e4a3dad"
-dependencies = [
- "crypto-common",
- "inout",
-]
-
 [[package]]
 name = "cjson"
 version = "0.1.2"
@@ -453,12 +440,6 @@ dependencies = [
  "memchr",
 ]
 
-[[package]]
-name = "constant_time_eq"
-version = "0.1.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "245097e9a4535ee1e3e3931fcfcd55a796a44c643e8596ff6566d68f09b87bbc"
-
 [[package]]
 name = "constant_time_eq"
 version = "0.3.0"
@@ -499,21 +480,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "crc32fast"
-version = "1.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b3855a8a784b474f333699ef2bbca9db2c4a1f6d9088a90a2d25b1eb53111eaa"
-dependencies = [
- "cfg-if",
-]
-
-[[package]]
-name = "crossbeam-utils"
-version = "0.8.19"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "248e3bacc7dc6baa3b21e405ee045c3047101a49145e7e9eca583ab4c2ca5345"
-
 [[package]]
 name = "crypto-common"
 version = "0.1.6"
@@ -550,15 +516,6 @@ dependencies = [
  "syn 1.0.109",
 ]
 
-[[package]]
-name = "deranged"
-version = "0.3.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b42b6fa04a440b495c8b04d0e71b707c585f83cb9cb28cf8cd0d976c315e31b4"
-dependencies = [
- "powerfmt",
-]
-
 [[package]]
 name = "digest"
 version = "0.10.7"
@@ -567,7 +524,6 @@ checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
 dependencies = [
  "block-buffer",
  "crypto-common",
- "subtle",
 ]
 
 [[package]]
@@ -588,28 +544,6 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7360491ce676a36bf9bb3c56c1aa791658183a54d2744120f27285738d90465a"
 
-[[package]]
-name = "filetime"
-version = "0.2.23"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1ee447700ac8aa0b2f2bd7bc4462ad686ba06baa6727ac149a2d6277f0d240fd"
-dependencies = [
- "cfg-if",
- "libc",
- "redox_syscall",
- "windows-sys 0.52.0",
-]
-
-[[package]]
-name = "flate2"
-version = "1.0.28"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "46303f565772937ffe1d394a4fac6f411c6013172fadde9dcdb1e147a086940e"
-dependencies = [
- "crc32fast",
- "miniz_oxide",
-]
-
 [[package]]
 name = "fnv"
 version = "1.0.7"
@@ -763,15 +697,6 @@ version = "0.3.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bd5256b483761cd23699d0da46cc6fd2ee3be420bbe6d020ae4a091e70b7e9fd"
 
-[[package]]
-name = "hmac"
-version = "0.12.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6c49c37c09c17a53d937dfbb742eb3a961d65a994e6bcdcf37e7399d0cc8ab5e"
-dependencies = [
- "digest",
-]
-
 [[package]]
 name = "home"
 version = "0.5.9"
@@ -916,15 +841,6 @@ dependencies = [
  "hashbrown 0.14.3",
 ]
 
-[[package]]
-name = "inout"
-version = "0.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a0c10553d664a4d0bcff9f4215d0aac67a639cc68ef660840afe309b807bc9f5"
-dependencies = [
- "generic-array",
-]
-
 [[package]]
 name = "itoa"
 version = "0.4.8"
@@ -959,15 +875,6 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8eaf4bc02d17cbdd7ff4c7438cafcdf7fb9a4613313ad11b4f8fefe7d3fa0130"
 
-[[package]]
-name = "jobserver"
-version = "0.1.28"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ab46a6e9526ddef3ae7f787c06f0f2600639ba80ea3eade3d8e670a2230f51d6"
-dependencies = [
- "libc",
-]
-
 [[package]]
 name = "js-sys"
 version = "0.3.68"
@@ -1227,12 +1134,6 @@ dependencies = [
  "winapi",
 ]
 
-[[package]]
-name = "num-conv"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "51d515d32fb182ee37cda2ccdcb92950d6a3c2893aa280e540671c2cd0f3b1d9"
-
 [[package]]
 name = "num-traits"
 version = "0.2.18"
@@ -1305,29 +1206,6 @@ dependencies = [
  "windows-targets 0.48.5",
 ]
 
-[[package]]
-name = "password-hash"
-version = "0.4.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7676374caaee8a325c9e7a2ae557f216c5563a171d6997b0ef8a65af35147700"
-dependencies = [
- "base64ct",
- "rand_core",
- "subtle",
-]
-
-[[package]]
-name = "pbkdf2"
-version = "0.11.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "83a0692ec44e4cf1ef28ca317f14f8f07da2d95ec3fa01f86e4467b725e60917"
-dependencies = [
- "digest",
- "hmac",
- "password-hash",
- "sha2",
-]
-
 [[package]]
 name = "percent-encoding"
 version = "2.3.1"
@@ -1356,23 +1234,21 @@ dependencies = [
  "tracing",
  "tracing-subscriber",
  "webbrowser",
- "zip",
 ]
 
 [[package]]
 name = "pflow-metamodel"
-version = "0.1.1"
+version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b8d9d503b79aea1947db8656f5817b24d46c9de1e43e2d4e156076859fae149c"
+checksum = "fad29300b899498298214eac7595bd908fc365f683a0e3cc0ce9c03a420b6213"
 dependencies = [
  "base64",
+ "brotli",
  "cjson",
- "filetime",
  "libipld",
  "multibase",
  "serde",
  "serde_json",
- "zip",
 ]
 
 [[package]]
@@ -1413,12 +1289,6 @@ version = "0.3.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d231b230927b5e4ad203db57bbcbee2802f6bce620b1e4a9024a07d94e2907ec"
 
-[[package]]
-name = "powerfmt"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "439ee305def115ba05938db6eb1644ff94165c5ab5e9420d1c1bcedbba909391"
-
 [[package]]
 name = "ppv-lite86"
 version = "0.2.17"
@@ -1681,17 +1551,6 @@ dependencies = [
  "serde",
 ]
 
-[[package]]
-name = "sha1"
-version = "0.10.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e3bf829a2d51ab4a5ddf1352d8470c140cadc8301b2ae1789db023f01cedd6ba"
-dependencies = [
- "cfg-if",
- "cpufeatures",
- "digest",
-]
-
 [[package]]
 name = "sha2"
 version = "0.10.8"
@@ -1762,12 +1621,6 @@ version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5ee073c9e4cd00e28217186dbe12796d692868f432bf2e97ee73bed0c56dfa01"
 
-[[package]]
-name = "subtle"
-version = "2.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "81cdd64d312baedb58e21336b31bc043b77e01cc99033ce76ef539f78e965ebc"
-
 [[package]]
 name = "syn"
 version = "1.0.109"
@@ -1838,25 +1691,6 @@ dependencies = [
  "once_cell",
 ]
 
-[[package]]
-name = "time"
-version = "0.3.34"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c8248b6521bb14bc45b4067159b9b6ad792e2d6d754d6c41fb50e29fefe38749"
-dependencies = [
- "deranged",
- "num-conv",
- "powerfmt",
- "serde",
- "time-core",
-]
-
-[[package]]
-name = "time-core"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ef927ca75afb808a4d64dd374f00a2adf8d0fcff8e7b184af886c3c87ec4a3f3"
-
 [[package]]
 name = "tinyvec"
 version = "1.6.0"
@@ -2458,52 +2292,3 @@ dependencies = [
  "quote",
  "syn 2.0.48",
 ]
-
-[[package]]
-name = "zip"
-version = "0.6.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "760394e246e4c28189f19d488c058bf16f564016aefac5d32bb1f3b51d5e9261"
-dependencies = [
- "aes",
- "byteorder",
- "bzip2",
- "constant_time_eq 0.1.5",
- "crc32fast",
- "crossbeam-utils",
- "flate2",
- "hmac",
- "pbkdf2",
- "sha1",
- "time",
- "zstd",
-]
-
-[[package]]
-name = "zstd"
-version = "0.11.2+zstd.1.5.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "20cc960326ece64f010d2d2107537f26dc589a6573a316bd5b1dba685fa5fde4"
-dependencies = [
- "zstd-safe",
-]
-
-[[package]]
-name = "zstd-safe"
-version = "5.0.2+zstd.1.5.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1d2a5585e04f9eea4b2a3d1eca508c4dee9592a89ef6f450c11719da0726f4db"
-dependencies = [
- "libc",
- "zstd-sys",
-]
-
-[[package]]
-name = "zstd-sys"
-version = "2.0.9+zstd.1.5.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9e16efa8a874a0481a574084d34cc26fdb3b99627480f785888deb6386506656"
-dependencies = [
- "cc",
- "pkg-config",
-]
diff --git a/Cargo.toml b/Cargo.toml
index dce63ab..d2fd0c3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,6 +24,5 @@ tower = { version = "0.4.13", features = ["full"] }
 tower-http = {  version = "0.5", features = ["util", "timeout", "trace"] }
 tracing = "0.1"
 tracing-subscriber = { version = "0.3.17", features = ["env-filter"] }
-zip = "0.6.6"
-pflow-metamodel = "0.1.1"
+pflow-metamodel = "0.1.2"
 webbrowser = "0.8.12"
diff --git a/src/server.rs b/src/server.rs
index 4790b00..7ff9159 100644
--- a/src/server.rs
+++ b/src/server.rs
@@ -15,7 +15,7 @@ use axum::{
 };
 use clap::Parser;
 use include_dir::{Dir, include_dir};
-use pflow_metamodel::compression::unzip_encoded;
+use pflow_metamodel::compression::decompress_brotli_decode;
 use pflow_metamodel::oid;
 use pflow_metamodel::petri_net::PetriNet;
 use tower_http::trace::TraceLayer;
@@ -33,7 +33,7 @@ async fn src_handler(
         .unwrap_or(Zblob::default());
 
     let encoded_str = zblob.base64_zipped;
-    let data = unzip_encoded(&*encoded_str, "model.json").unwrap_or("".to_string());
+    let data = decompress_brotli_decode(&*encoded_str).unwrap_or("".to_string());
     let content_type = "application/json charset=utf-8";
     let status = StatusCode::OK;
     Response::builder()
@@ -52,7 +52,7 @@ async fn img_handler(
         .unwrap_or(Option::from(Zblob::default()))
         .unwrap_or(Zblob::default());
 
-    let data = unzip_encoded(&zblob.base64_zipped, "model.json").unwrap_or("".to_string());
+    let data = decompress_brotli_decode(&zblob.base64_zipped).unwrap_or("".to_string());
     let content_type = "application/json charset=utf-8";
     let status = StatusCode::OK;
     Response::builder()
diff --git a/src/storage.rs b/src/storage.rs
index 6ba264d..1b86973 100644
--- a/src/storage.rs
+++ b/src/storage.rs
@@ -4,7 +4,7 @@ use rusqlite::{Connection, params, Result};
 use serde::{Serialize, Serializer};
 
 use pflow_metamodel::oid::Oid;
-use pflow_metamodel::compression::encode_zip;
+use pflow_metamodel::compression::decompress_brotli_decode;
 use pflow_metamodel::petri_net::PetriNet;
 
 #[derive(Debug, Clone, Serialize)]
@@ -22,7 +22,11 @@ pub struct Zblob {
 impl Default for Zblob {
     fn default() -> Self {
         let net = serde_json::to_string(&PetriNet::new()).unwrap();
-        let data = encode_zip(&net, "model.json");
+        let decoded = decompress_brotli_decode(&net);
+        let data = match decoded {
+            Some(data) => data,
+            None => net,
+        };
         Self {
             id: 0,
             ipfs_cid: Oid::new(data.as_bytes()).unwrap().to_string(),