diff --git a/Cargo.toml b/Cargo.toml
index 02712ba..a71e10f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,27 +4,32 @@ version = "0.1.0"
 authors = ["Kai Michaelis <kai@sequoia-pgp.org>"]
 build = "build.rs"
 
+[workspace]
+members = [
+    "database",
+]
+
 [dependencies]
+hagrid-database = { path = "database" }
 failure = "0.1.5"
 rocket = "0"
 rocket_codegen = "0"
 sequoia-openpgp =  { git = "https://gitlab.com/sequoia-pgp/sequoia.git", rev = "e07bb25de0b2291088f88dc5360f3d04f702049c" }
 multipart = "0"
 log = "0"
-rand = "0.5"
+# rand = "0.5"
 serde = "1.0"
 serde_derive = "1.0"
 serde_json = "1.0"
 time = "0.1"
 tempfile = "3.0"
-parking_lot = "0.6"
 structopt = "0.2"
 url = "1.6"
-hex = "0.3"
+# hex = "0.3"
 lettre_email = "0.8"
 handlebars = "1.1.0"
-base64 = "0.10"
-pathdiff = "0.1"
+# base64 = "0.10"
+# pathdiff = "0.1"
 num_cpus = "1.0"
 fs_extra = "1.0"
 
diff --git a/database/Cargo.toml b/database/Cargo.toml
new file mode 100644
index 0000000..1325dd3
--- /dev/null
+++ b/database/Cargo.toml
@@ -0,0 +1,25 @@
+[package]
+name = "hagrid-database"
+version = "0.1.0"
+authors = ["Kai Michaelis <kai@sequoia-pgp.org>"]
+
+[dependencies]
+failure = "0.1.5"
+sequoia-openpgp =  { git = "https://gitlab.com/sequoia-pgp/sequoia.git", rev = "e07bb25de0b2291088f88dc5360f3d04f702049c" }
+multipart = "0"
+log = "0"
+rand = "0.5"
+serde = { version = "1.0", features = ["derive"] }
+serde_derive = "1.0"
+serde_json = "1.0"
+time = "0.1"
+tempfile = "3.0"
+parking_lot = "0.6"
+url = "1.6"
+hex = "0.3"
+base64 = "0.10"
+pathdiff = "0.1"
+
+[lib]
+name = "hagrid_database"
+path = "src/lib.rs"
diff --git a/src/database/fs.rs b/database/src/fs.rs
similarity index 99%
rename from src/database/fs.rs
rename to database/src/fs.rs
index 10a3a2b..491a026 100644
--- a/src/database/fs.rs
+++ b/database/src/fs.rs
@@ -11,7 +11,7 @@ use pathdiff::diff_paths;
 
 //use sequoia_openpgp::armor::{Writer, Kind};
 
-use database::{Database, Delete, Verify, Query};
+use {Database, Delete, Verify, Query};
 use types::{Email, Fingerprint, KeyID};
 use Result;
 
@@ -460,8 +460,8 @@ impl Database for Filesystem {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use database::test;
-    use sequoia_openpgp::tpk::TPKBuilder;
+    use test;
+    use openpgp::tpk::TPKBuilder;
     use tempfile::TempDir;
 
     #[test]
diff --git a/src/database/mod.rs b/database/src/lib.rs
similarity index 96%
rename from src/database/mod.rs
rename to database/src/lib.rs
index b372c8b..132b3c5 100644
--- a/src/database/mod.rs
+++ b/database/src/lib.rs
@@ -1,25 +1,42 @@
-use parking_lot::MutexGuard;
+#![feature(proc_macro_hygiene, plugin, decl_macro)]
+#![recursion_limit = "1024"]
+#![feature(try_from)]
+
 use std::convert::TryFrom;
 use std::io::Cursor;
+use std::io::Write;
 use std::path::PathBuf;
 use std::result;
 use std::str::FromStr;
 
-use sequoia_openpgp::{
-    constants::SignatureType, packet::Signature, packet::UserID, parse::Parse,
+extern crate failure;
+use failure::Error;
+use failure::Fallible as Result;
+#[macro_use] extern crate log;
+extern crate parking_lot;
+use parking_lot::MutexGuard;
+extern crate pathdiff;
+extern crate rand;
+extern crate serde;
+extern crate serde_json;
+extern crate tempfile;
+extern crate time;
+extern crate url;
+
+extern crate sequoia_openpgp as openpgp;
+use openpgp::{
     Packet, TPK,
+    PacketPile,
+    armor::{Writer, Kind},
+    constants::SignatureType, packet::Signature, packet::UserID, parse::Parse,
     packet::Tag,
-    serialize::Serialize,
+    serialize::Serialize as OpenPgpSerialize,
 };
-use sequoia_openpgp::PacketPile;
 
-use std::io::Write;
-use sequoia_openpgp::armor::{Writer, Kind};
+use serde::{Serialize, Deserialize, Deserializer, Serializer};
 
-use serde::{Deserialize, Deserializer, Serializer};
-use time;
+pub mod types;
 use types::{Email, Fingerprint, KeyID};
-use Result;
 
 mod fs;
 pub use self::fs::Filesystem;
@@ -64,7 +81,7 @@ impl Verify {
     pub fn new(
         uid: &UserID, sig: &[Signature], fpr: Fingerprint,
     ) -> Result<Self> {
-        use sequoia_openpgp::serialize::Serialize;
+        use openpgp::serialize::Serialize;
 
         let mut cur = Cursor::new(Vec::default());
         uid.serialize(&mut cur)?;
@@ -208,7 +225,7 @@ pub trait Database: Sync + Send {
     }
 
     fn tpk_into_bytes(tpk: &TPK) -> Result<Vec<u8>> {
-        use sequoia_openpgp::serialize::Serialize;
+        use openpgp::serialize::Serialize;
         use std::io::Cursor;
 
         let mut cur = Cursor::new(Vec::default());
@@ -326,7 +343,7 @@ pub trait Database: Sync + Send {
     }
 
     fn merge_or_publish(&self, mut tpk: TPK) -> Result<Vec<(Email, String)>> {
-        use sequoia_openpgp::RevocationStatus;
+        use openpgp::RevocationStatus;
 
         let fpr = Fingerprint::try_from(tpk.primary().fingerprint())?;
         let mut all_uids = Vec::default();
diff --git a/src/database/memory.rs b/database/src/memory.rs
similarity index 98%
rename from src/database/memory.rs
rename to database/src/memory.rs
index 9fe3da8..30656d6 100644
--- a/src/database/memory.rs
+++ b/database/src/memory.rs
@@ -1,7 +1,7 @@
 use parking_lot::{Mutex, MutexGuard};
 use std::collections::HashMap;
 
-use database::{Database, Delete, Verify, Query};
+use {Database, Delete, Verify, Query};
 use types::{Email, Fingerprint, KeyID};
 use Result;
 
@@ -160,8 +160,8 @@ impl Memory {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use database::test;
-    use sequoia_openpgp::tpk::TPKBuilder;
+    use test;
+    use openpgp::tpk::TPKBuilder;
 
     #[test]
     fn new() {
diff --git a/src/database/poly.rs b/database/src/poly.rs
similarity index 98%
rename from src/database/poly.rs
rename to database/src/poly.rs
index 6ec2314..c23ed73 100644
--- a/src/database/poly.rs
+++ b/database/src/poly.rs
@@ -1,6 +1,6 @@
 use std::path::PathBuf;
 
-use database::{Database, Delete, Filesystem, Memory, Verify, Query};
+use {Database, Delete, Filesystem, Memory, Verify, Query};
 use Result;
 use types::{Email, Fingerprint, KeyID};
 use parking_lot::MutexGuard;
diff --git a/src/database/test.rs b/database/src/test.rs
similarity index 99%
rename from src/database/test.rs
rename to database/src/test.rs
index f89d9b5..939d9d0 100644
--- a/src/database/test.rs
+++ b/database/src/test.rs
@@ -17,9 +17,9 @@
 use std::convert::TryFrom;
 use std::str::FromStr;
 
-use database::Database;
-use sequoia_openpgp::tpk::{TPKBuilder, UserIDBinding};
-use sequoia_openpgp::{
+use Database;
+use openpgp::tpk::{TPKBuilder, UserIDBinding};
+use openpgp::{
     constants::ReasonForRevocation, constants::SignatureType, packet::UserID,
     parse::Parse, Packet, PacketPile, RevocationStatus, TPK,
 };
diff --git a/src/types.rs b/database/src/types.rs
similarity index 98%
rename from src/types.rs
rename to database/src/types.rs
index 3024ecf..3ebe3d7 100644
--- a/src/types.rs
+++ b/database/src/types.rs
@@ -2,7 +2,7 @@ use std::convert::TryFrom;
 use std::result;
 use std::str::FromStr;
 
-use sequoia_openpgp::{self, packet::UserID};
+use openpgp::packet::UserID;
 use serde::{Deserialize, Deserializer, Serialize, Serializer};
 use {Error, Result};
 
diff --git a/src/import.rs b/src/import.rs
index eee783f..7659fca 100644
--- a/src/import.rs
+++ b/src/import.rs
@@ -9,42 +9,22 @@
 #![recursion_limit = "1024"]
 #![feature(try_from)]
 
-
 use std::env;
 use std::path::PathBuf;
 use std::thread;
 use std::cmp;
 
 extern crate failure;
-use failure::Error;
 use failure::Fallible as Result;
 
 extern crate num_cpus;
-
-extern crate serde;
-#[macro_use]
-extern crate serde_derive;
-extern crate serde_json;
-
-extern crate hex;
-extern crate time;
-extern crate url;
-
-extern crate sequoia_openpgp;
-#[macro_use]
-extern crate log;
-extern crate parking_lot;
-extern crate rand;
 extern crate tempfile;
-extern crate pathdiff;
 
 extern crate sequoia_openpgp as openpgp;
 use openpgp::Packet;
 use openpgp::parse::{PacketParser, PacketParserResult, Parse};
 
-mod database;
-mod types;
-
+extern crate hagrid_database as database;
 use database::{Database, Filesystem};
 
 fn main() {
diff --git a/src/mail.rs b/src/mail.rs
index b2320aa..91e7a2e 100644
--- a/src/mail.rs
+++ b/src/mail.rs
@@ -6,7 +6,7 @@ use lettre_email::EmailBuilder;
 
 use serde::Serialize;
 
-use types::Email;
+use database::types::Email;
 use Result;
 
 #[derive(Serialize, Clone)]
diff --git a/src/main.rs b/src/main.rs
index 352693d..3ce4b8a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -3,7 +3,6 @@
 #![feature(try_from)]
 
 extern crate failure;
-use failure::Error;
 use failure::Fallible as Result;
 
 extern crate serde;
@@ -11,7 +10,6 @@ extern crate serde;
 extern crate serde_derive;
 extern crate serde_json;
 
-extern crate hex;
 extern crate time;
 extern crate url;
 
@@ -21,26 +19,19 @@ extern crate multipart;
 extern crate rocket_contrib;
 
 extern crate sequoia_openpgp;
-#[macro_use]
-extern crate log;
-extern crate base64;
 extern crate handlebars;
 extern crate lettre;
 extern crate lettre_email;
-extern crate parking_lot;
-extern crate rand;
 extern crate structopt;
 extern crate tempfile;
-extern crate pathdiff;
 
 #[cfg(test)]
 extern crate fs_extra;
 #[cfg(test)]
 extern crate regex;
 
-mod database;
+extern crate hagrid_database as database;
 mod mail;
-mod types;
 mod web;
 
 use std::path::PathBuf;
diff --git a/src/web/mod.rs b/src/web/mod.rs
index eec64c4..eac92a5 100644
--- a/src/web/mod.rs
+++ b/src/web/mod.rs
@@ -17,8 +17,8 @@ mod upload;
 use mail;
 
 use database::{Database, Polymorphic, Query};
+use database::types::{Email, Fingerprint, KeyID};
 use Result;
-use types::{Email, Fingerprint, KeyID};
 use Opt;
 
 use std::result;
@@ -26,7 +26,7 @@ use std::str::FromStr;
 
 mod queries {
     use std::fmt;
-    use types::{Email, Fingerprint, KeyID};
+    use database::types::{Email, Fingerprint, KeyID};
 
     #[derive(Debug)]
     pub enum Hkp {