diff --git a/Cargo.lock b/Cargo.lock
index be04a4d..d6fd969 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -38,21 +38,6 @@ dependencies = [
  "memchr",
 ]
 
-[[package]]
-name = "android-tzdata"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e999941b234f3131b00bc13c22d06e8c5ff726d1b6318ac7eb276997bbb4fef0"
-
-[[package]]
-name = "android_system_properties"
-version = "0.1.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "819e7219dbd41043ac279b19830f2efc897156490d7fd6ea916720117ee66311"
-dependencies = [
- "libc",
-]
-
 [[package]]
 name = "anes"
 version = "0.1.6"
@@ -250,21 +235,11 @@ version = "2.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b048fb63fd8b5923fc5aa7b340d8e156aec7ec02f0c78fa8a6ddc2613f6f71de"
 
-[[package]]
-name = "bitflags_serde_shim"
-version = "0.2.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "df031780c32b0f93cecaf883fa9e351e74679e24380c534aeef94556cfd80ac9"
-dependencies = [
- "serde",
-]
-
 [[package]]
 name = "blah-types"
 version = "0.0.0"
 dependencies = [
  "bitflags",
- "bitflags_serde_shim",
  "criterion",
  "ed25519-dalek",
  "expect-test",
@@ -277,7 +252,6 @@ dependencies = [
  "serde",
  "serde_jcs",
  "serde_json",
- "serde_with",
  "sha2",
  "thiserror",
  "url",
@@ -399,19 +373,6 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "613afe47fcd5fac7ccf1db93babcb082c5994d996f20b8b159f2ad1658eb5724"
 
-[[package]]
-name = "chrono"
-version = "0.4.38"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a21f936df1771bf62b77f047b726c4625ff2e8aa607c01ec06e5a05bd8463401"
-dependencies = [
- "android-tzdata",
- "iana-time-zone",
- "num-traits",
- "serde",
- "windows-targets",
-]
-
 [[package]]
 name = "ciborium"
 version = "0.2.2"
@@ -620,41 +581,6 @@ dependencies = [
  "syn",
 ]
 
-[[package]]
-name = "darling"
-version = "0.20.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6f63b86c8a8826a49b8c21f08a2d07338eec8d900540f8630dc76284be802989"
-dependencies = [
- "darling_core",
- "darling_macro",
-]
-
-[[package]]
-name = "darling_core"
-version = "0.20.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "95133861a8032aaea082871032f5815eb9e98cef03fa916ab4500513994df9e5"
-dependencies = [
- "fnv",
- "ident_case",
- "proc-macro2",
- "quote",
- "strsim",
- "syn",
-]
-
-[[package]]
-name = "darling_macro"
-version = "0.20.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d336a2a514f6ccccaa3e09b02d41d35330c07ddf03a62165fcec10bb561c7806"
-dependencies = [
- "darling_core",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "data-encoding"
 version = "2.6.0"
@@ -672,16 +598,6 @@ dependencies = [
  "zeroize",
 ]
 
-[[package]]
-name = "deranged"
-version = "0.3.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b42b6fa04a440b495c8b04d0e71b707c585f83cb9cb28cf8cd0d976c315e31b4"
-dependencies = [
- "powerfmt",
- "serde",
-]
-
 [[package]]
 name = "digest"
 version = "0.10.7"
@@ -922,7 +838,7 @@ dependencies = [
  "futures-core",
  "futures-sink",
  "http",
- "indexmap 2.6.0",
+ "indexmap",
  "slab",
  "tokio",
  "tokio-util",
@@ -939,12 +855,6 @@ dependencies = [
  "crunchy",
 ]
 
-[[package]]
-name = "hashbrown"
-version = "0.12.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
-
 [[package]]
 name = "hashbrown"
 version = "0.14.5"
@@ -1130,35 +1040,6 @@ dependencies = [
  "tracing",
 ]
 
-[[package]]
-name = "iana-time-zone"
-version = "0.1.61"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "235e081f3925a06703c2d0117ea8b91f042756fd6e7a6e5d901e8ca1a996b220"
-dependencies = [
- "android_system_properties",
- "core-foundation-sys",
- "iana-time-zone-haiku",
- "js-sys",
- "wasm-bindgen",
- "windows-core",
-]
-
-[[package]]
-name = "iana-time-zone-haiku"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f31827a206f56af32e590ba56d5d2d085f558508192593743f16b2306495269f"
-dependencies = [
- "cc",
-]
-
-[[package]]
-name = "ident_case"
-version = "1.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b9e0384b61958566e926dc50660321d12159025e767c18e043daf26b70104c39"
-
 [[package]]
 name = "idna"
 version = "0.5.0"
@@ -1169,17 +1050,6 @@ dependencies = [
  "unicode-normalization",
 ]
 
-[[package]]
-name = "indexmap"
-version = "1.9.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bd070e393353796e801d209ad339e89596eb4c8d430d18ede6a1cced8fafbd99"
-dependencies = [
- "autocfg",
- "hashbrown 0.12.3",
- "serde",
-]
-
 [[package]]
 name = "indexmap"
 version = "2.6.0"
@@ -1188,7 +1058,6 @@ checksum = "707907fe3c25f5424cce2cb7e1cbcafee6bdbe735ca90ef77c29e84591e5b9da"
 dependencies = [
  "equivalent",
  "hashbrown 0.15.0",
- "serde",
 ]
 
 [[package]]
@@ -1372,12 +1241,6 @@ 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 = "0.2.19"
@@ -1597,12 +1460,6 @@ dependencies = [
  "plotters-backend",
 ]
 
-[[package]]
-name = "powerfmt"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "439ee305def115ba05938db6eb1644ff94165c5ab5e9420d1c1bcedbba909391"
-
 [[package]]
 name = "ppv-lite86"
 version = "0.2.20"
@@ -2109,36 +1966,6 @@ dependencies = [
  "serde",
 ]
 
-[[package]]
-name = "serde_with"
-version = "3.11.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8e28bdad6db2b8340e449f7108f020b3b092e8583a9e3fb82713e1d4e71fe817"
-dependencies = [
- "base64",
- "chrono",
- "hex",
- "indexmap 1.9.3",
- "indexmap 2.6.0",
- "serde",
- "serde_derive",
- "serde_json",
- "serde_with_macros",
- "time",
-]
-
-[[package]]
-name = "serde_with_macros"
-version = "3.11.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9d846214a9854ef724f3da161b426242d8de7c1fc7de2f89bb1efcb154dca79d"
-dependencies = [
- "darling",
- "proc-macro2",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "sha1"
 version = "0.10.6"
@@ -2250,7 +2077,7 @@ dependencies = [
  "bitflags",
  "cc",
  "fallible-iterator",
- "indexmap 2.6.0",
+ "indexmap",
  "log",
  "memchr",
  "phf",
@@ -2361,37 +2188,6 @@ dependencies = [
  "once_cell",
 ]
 
-[[package]]
-name = "time"
-version = "0.3.36"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5dfd88e563464686c916c7e46e623e520ddc6d79fa6641390f2e3fa86e83e885"
-dependencies = [
- "deranged",
- "itoa",
- "num-conv",
- "powerfmt",
- "serde",
- "time-core",
- "time-macros",
-]
-
-[[package]]
-name = "time-core"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ef927ca75afb808a4d64dd374f00a2adf8d0fcff8e7b184af886c3c87ec4a3f3"
-
-[[package]]
-name = "time-macros"
-version = "0.2.18"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3f252a68540fde3a3877aeea552b832b40ab9a69e318efd078774a01ddee1ccf"
-dependencies = [
- "num-conv",
- "time-core",
-]
-
 [[package]]
 name = "tinytemplate"
 version = "1.2.1"
@@ -2530,7 +2326,7 @@ version = "0.22.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4ae48d6208a266e853d946088ed816055e556cc6028c5e8e2b84d9fa5dd7c7f5"
 dependencies = [
- "indexmap 2.6.0",
+ "indexmap",
  "serde",
  "serde_spanned",
  "toml_datetime",
@@ -2886,15 +2682,6 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
-[[package]]
-name = "windows-core"
-version = "0.52.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "33ab640c8d7e35bf8ba19b884ba838ceb4fba93a4e8c65a9059d08afcfc683d9"
-dependencies = [
- "windows-targets",
-]
-
 [[package]]
 name = "windows-registry"
 version = "0.2.0"
diff --git a/blah-types/Cargo.toml b/blah-types/Cargo.toml
index 146cb1d..b420d3c 100644
--- a/blah-types/Cargo.toml
+++ b/blah-types/Cargo.toml
@@ -4,9 +4,11 @@ version = "0.0.0"
 edition = "2021"
 
 [features]
-default = []
-unsafe_use_mock_instant_for_testing = ["dep:mock_instant"]
+default = ["ed25519-dalek/default"]
 schemars = ["dep:schemars"]
+rusqlite = ["dep:rusqlite"]
+
+unsafe_use_mock_instant_for_testing = ["dep:mock_instant"]
 
 [[bench]]
 name = "crypto_ops"
@@ -14,25 +16,29 @@ harness = false
 
 [dependencies]
 bitflags = "2"
-bitflags_serde_shim = "0.2"
-ed25519-dalek = "2"
+ed25519-dalek = { version = "2", default-features = false }
 hex = { version = "0.4", features = ["serde"] }
 html-escape = "0.2"
-mock_instant = { version = "0.5", optional = true }
 rand = "0.8"
-rusqlite = { version = "0.32", optional = true }
 serde = { version = "1", features = ["derive"] }
 serde_jcs = "0.1"
 serde_json = "1"
-serde_with = "3"
 thiserror = "1"
 url = { version = "2", features = ["serde"] }
 
+[dependencies.rusqlite]
+version = "0.32"
+optional = true
+
 [dependencies.schemars]
 version = "0.8"
 optional = true
 features = ["url"]
 
+[dependencies.mock_instant]
+version = "0.5"
+optional = true
+
 [dev-dependencies]
 criterion = "0.5"
 ed25519-dalek = { version = "2", features = ["rand_core"] }
diff --git a/blah-types/src/lib.rs b/blah-types/src/lib.rs
index aa8e3f7..1c66e52 100644
--- a/blah-types/src/lib.rs
+++ b/blah-types/src/lib.rs
@@ -14,7 +14,7 @@ macro_rules! impl_json_schema_as {
 // Workaround: https://github.com/GREsau/schemars/issues/267
 #[cfg(feature = "schemars")]
 macro_rules! impl_json_schema_as {
-    ($ty:ident => $as_ty:ty) => {
+    ($ty:ty => $as_ty:ty) => {
         impl schemars::JsonSchema for $ty {
             fn schema_name() -> String {
                 stringify!($ty).into()
diff --git a/blah-types/src/msg.rs b/blah-types/src/msg.rs
index edbe8b8..78eddb4 100644
--- a/blah-types/src/msg.rs
+++ b/blah-types/src/msg.rs
@@ -3,9 +3,7 @@ use std::fmt;
 use std::num::ParseIntError;
 use std::str::FromStr;
 
-use bitflags_serde_shim::impl_serde_for_bitflags;
 use serde::{de, ser, Deserialize, Serialize};
-use serde_with::{serde_as, DisplayFromStr};
 use url::Url;
 
 use crate::identity::IdUrl;
@@ -13,13 +11,26 @@ use crate::{PubKey, Signed};
 
 /// An opaque server-specific ID for rooms, messages, and etc.
 /// It's currently serialized as a string for JavaScript's convenience.
-#[serde_as]
-#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize)]
-#[serde(transparent)]
-pub struct Id(#[serde_as(as = "DisplayFromStr")] pub i64);
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct Id(pub i64);
 
 impl_json_schema_as!(Id => String);
 
+impl Serialize for Id {
+    fn serialize<S: ser::Serializer>(&self, ser: S) -> Result<S::Ok, S::Error> {
+        // TODO: No alloc?
+        self.0.to_string().serialize(ser)
+    }
+}
+
+impl<'de> Deserialize<'de> for Id {
+    fn deserialize<D: de::Deserializer<'de>>(de: D) -> Result<Self, D::Error> {
+        let s = <&str>::deserialize(de)?;
+        s.parse()
+            .map_err(|_| de::Error::invalid_value(de::Unexpected::Str(s), &"a stringified integer"))
+    }
+}
+
 impl fmt::Display for Id {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         self.0.fmt(f)
@@ -455,13 +466,27 @@ bitflags::bitflags! {
     }
 }
 
-impl_serde_for_bitflags!(ServerPermission);
-impl_serde_for_bitflags!(MemberPermission);
-impl_serde_for_bitflags!(RoomAttrs);
+macro_rules! impl_for_bitflags {
+    ($($ty:ty),* $(,)?) => {
+        $(
+            impl Serialize for $ty {
+                fn serialize<S: ser::Serializer>(&self, ser: S) -> Result<S::Ok, S::Error> {
+                    self.bits().serialize(ser)
+                }
+            }
 
-impl_json_schema_as!(ServerPermission => i32);
-impl_json_schema_as!(MemberPermission => i32);
-impl_json_schema_as!(RoomAttrs => i32);
+            impl<'de> Deserialize<'de> for $ty {
+                fn deserialize<D: de::Deserializer<'de>>(de: D) -> Result<Self, D::Error> {
+                    <_>::deserialize(de).map(Self::from_bits_retain)
+                }
+            }
+
+            impl_json_schema_as!($ty => <$ty as bitflags::Flags>::Bits);
+        )*
+    };
+}
+
+impl_for_bitflags!(ServerPermission, MemberPermission, RoomAttrs);
 
 #[cfg(test)]
 mod tests {
diff --git a/blahd/Cargo.toml b/blahd/Cargo.toml
index d73b996..038a7da 100644
--- a/blahd/Cargo.toml
+++ b/blahd/Cargo.toml
@@ -5,6 +5,7 @@ edition = "2021"
 
 [features]
 default = []
+
 unsafe_use_mock_instant_for_testing = ["dep:mock_instant", "blah-types/unsafe_use_mock_instant_for_testing"]
 
 [dependencies]
@@ -18,7 +19,6 @@ futures-util = "0.3"
 html-escape = "0.2"
 http-body-util = "0.1"
 humantime = "2"
-mock_instant = { version = "0.5", optional = true }
 parking_lot = "0.12" # Maybe no better performance, just that we hate poisoning. ¯\_(ツ)_/¯
 paste = "1.0.15"
 rand = "0.8"
@@ -43,6 +43,10 @@ url = { version = "2", features = ["serde"] }
 
 blah-types = { path = "../blah-types", features = ["rusqlite"] }
 
+[dependencies.mock_instant]
+version = "0.5"
+optional = true
+
 [build-dependencies]
 url = "2"