diff --git a/ruma-api/Cargo.toml b/ruma-api/Cargo.toml
index d565afee..acf45ba2 100644
--- a/ruma-api/Cargo.toml
+++ b/ruma-api/Cargo.toml
@@ -20,7 +20,7 @@ http = "0.2.2"
 percent-encoding = "2.1.0"
 ruma-api-macros = { version = "=0.17.0-alpha.1", path = "../ruma-api-macros" }
 ruma-identifiers = { version = "0.17.4", path = "../ruma-identifiers" }
-ruma-serde = { version = "0.2.3", path = "../ruma-serde" }
+ruma-serde = { version = "0.3.0", path = "../ruma-serde" }
 serde = { version = "1.0.118", features = ["derive"] }
 serde_json = "1.0.60"
 thiserror = "1.0.22"
diff --git a/ruma-appservice-api/Cargo.toml b/ruma-appservice-api/Cargo.toml
index be36a16b..e5c8a51f 100644
--- a/ruma-appservice-api/Cargo.toml
+++ b/ruma-appservice-api/Cargo.toml
@@ -16,7 +16,7 @@ ruma-api = { version = "=0.17.0-alpha.1", path = "../ruma-api" }
 ruma-common = { version = "0.2.0", path = "../ruma-common" }
 ruma-events = { version = "=0.22.0-alpha.1", path = "../ruma-events" }
 ruma-identifiers = { version = "0.17.4", path = "../ruma-identifiers" }
-ruma-serde = { version = "0.2.3", path = "../ruma-serde" }
+ruma-serde = { version = "0.3.0", path = "../ruma-serde" }
 serde = { version = "1.0.118", features = ["derive"] }
 serde_json = "1.0.57"
 
diff --git a/ruma-client-api/Cargo.toml b/ruma-client-api/Cargo.toml
index 2654f514..191157b8 100644
--- a/ruma-client-api/Cargo.toml
+++ b/ruma-client-api/Cargo.toml
@@ -26,7 +26,7 @@ ruma-api = { version = "=0.17.0-alpha.1", path = "../ruma-api" }
 ruma-common = { version = "0.2.0", path = "../ruma-common" }
 ruma-events = { version = "=0.22.0-alpha.1", path = "../ruma-events" }
 ruma-identifiers = { version = "0.17.4", path = "../ruma-identifiers" }
-ruma-serde = { version = "0.2.3", path = "../ruma-serde" }
+ruma-serde = { version = "0.3.0", path = "../ruma-serde" }
 serde = { version = "1.0.118", features = ["derive"] }
 serde_json = "1.0.60"
 
diff --git a/ruma-client/Cargo.toml b/ruma-client/Cargo.toml
index 2ca5ad04..082c87e2 100644
--- a/ruma-client/Cargo.toml
+++ b/ruma-client/Cargo.toml
@@ -28,7 +28,7 @@ ruma-client-api = { version = "0.10.0-alpha.1", path = "../ruma-client-api" }
 ruma-common = { version = "0.2.0", path = "../ruma-common" }
 ruma-events = { version = "=0.22.0-alpha.1", path = "../ruma-events" }
 ruma-identifiers = { version = "0.17.4", path = "../ruma-identifiers" }
-ruma-serde = { version = "0.2.3", path = "../ruma-serde" }
+ruma-serde = { version = "0.3.0", path = "../ruma-serde" }
 serde = { version = "1.0.118", features = ["derive"] }
 serde_json = "1.0.61"
 
@@ -43,8 +43,16 @@ default = ["http1", "http2", "tls-native"]
 http1 = ["hyper/http1"]
 http2 = ["hyper/http2"]
 tls-native = ["hyper-tls", "_tls"]
-tls-rustls-native-roots = ["hyper-rustls", "hyper-rustls/native-tokio", "_tls-rustls"]
-tls-rustls-webpki-roots = ["hyper-rustls", "hyper-rustls/webpki-tokio", "_tls-rustls"]
+tls-rustls-native-roots = [
+    "hyper-rustls",
+    "hyper-rustls/native-tokio",
+    "_tls-rustls",
+]
+tls-rustls-webpki-roots = [
+    "hyper-rustls",
+    "hyper-rustls/webpki-tokio",
+    "_tls-rustls",
+]
 
 unstable-synapse-quirks = ["ruma-events/unstable-synapse-quirks"]
 
diff --git a/ruma-common/Cargo.toml b/ruma-common/Cargo.toml
index a1c7acaf..b084df89 100644
--- a/ruma-common/Cargo.toml
+++ b/ruma-common/Cargo.toml
@@ -14,7 +14,7 @@ edition = "2018"
 js_int = { version = "0.2.0", features = ["serde"] }
 maplit = "1.0.2"
 ruma-identifiers = { version = "0.17.4", path = "../ruma-identifiers" }
-ruma-serde = { version = "0.2.3", path = "../ruma-serde" }
+ruma-serde = { version = "0.3.0", path = "../ruma-serde" }
 serde = { version = "1.0.118", features = ["derive"] }
 serde_json = { version = "1.0.60", features = ["raw_value"] }
 
diff --git a/ruma-events/Cargo.toml b/ruma-events/Cargo.toml
index 0110f100..231058cb 100644
--- a/ruma-events/Cargo.toml
+++ b/ruma-events/Cargo.toml
@@ -18,7 +18,7 @@ js_int = { version = "0.2.0", features = ["serde"] }
 ruma-common = { version = "0.2.0", path = "../ruma-common" }
 ruma-events-macros = { version = "=0.22.0-alpha.1", path = "../ruma-events-macros" }
 ruma-identifiers = { version = "0.17.4", path = "../ruma-identifiers" }
-ruma-serde = { version = "0.2.3", path = "../ruma-serde" }
+ruma-serde = { version = "0.3.0", path = "../ruma-serde" }
 serde = { version = "1.0.118", features = ["derive"] }
 serde_json = { version = "1.0.60", features = ["raw_value"] }
 
diff --git a/ruma-federation-api/Cargo.toml b/ruma-federation-api/Cargo.toml
index 3ee377f1..3cd4c684 100644
--- a/ruma-federation-api/Cargo.toml
+++ b/ruma-federation-api/Cargo.toml
@@ -21,7 +21,7 @@ ruma-api = { version = "=0.17.0-alpha.1", path = "../ruma-api" }
 ruma-common = { version = "0.2.0", path = "../ruma-common" }
 ruma-events = { version = "=0.22.0-alpha.1", path = "../ruma-events" }
 ruma-identifiers = { version = "0.17.4", path = "../ruma-identifiers" }
-ruma-serde = { version = "0.2.3", path = "../ruma-serde" }
+ruma-serde = { version = "0.3.0", path = "../ruma-serde" }
 serde = { version = "1.0.118", features = ["derive"] }
 serde_json = "1.0.60"
 
diff --git a/ruma-identifiers-validation/Cargo.toml b/ruma-identifiers-validation/Cargo.toml
index 10f51994..d44c5a22 100644
--- a/ruma-identifiers-validation/Cargo.toml
+++ b/ruma-identifiers-validation/Cargo.toml
@@ -19,5 +19,5 @@ default = ["serde"]
 serde = { version = "1.0.118", optional = true, features = ["derive"] }
 
 [dev-dependencies]
-ruma-serde = { version = "0.2.3", path = "../ruma-serde" }
+ruma-serde = { version = "0.3.0", path = "../ruma-serde" }
 serde_json = "1.0.60"
diff --git a/ruma-identifiers/Cargo.toml b/ruma-identifiers/Cargo.toml
index baad75f2..c1f22e25 100644
--- a/ruma-identifiers/Cargo.toml
+++ b/ruma-identifiers/Cargo.toml
@@ -29,8 +29,8 @@ paste = "1.0.4"
 rand = { version = "0.8.0", optional = true }
 ruma-identifiers-macros = { version = "=0.17.4", path = "../ruma-identifiers-macros" }
 ruma-identifiers-validation = { version = "0.1.1", path = "../ruma-identifiers-validation", default-features = false }
-ruma-serde = { version = "0.2.3", path = "../ruma-serde", optional = true }
-ruma-serde-macros = { version = "0.2.3", path = "../ruma-serde-macros" }
+ruma-serde = { version = "0.3.0", path = "../ruma-serde", optional = true }
+ruma-serde-macros = { version = "0.3.0", path = "../ruma-serde-macros" }
 # Renamed so we can have a serde feature.
 serde1 = { package = "serde", version = "1.0.118", optional = true, features = ["derive"] }
 
diff --git a/ruma-identity-service-api/Cargo.toml b/ruma-identity-service-api/Cargo.toml
index 9961d609..53456115 100644
--- a/ruma-identity-service-api/Cargo.toml
+++ b/ruma-identity-service-api/Cargo.toml
@@ -14,6 +14,6 @@ edition = "2018"
 ruma-api = { version = "=0.17.0-alpha.1", path = "../ruma-api" }
 ruma-common = { version = "0.2.0", path = "../ruma-common" }
 ruma-identifiers = { version = "0.17.4", path = "../ruma-identifiers" }
-ruma-serde = { version = "0.2.3", path = "../ruma-serde" }
+ruma-serde = { version = "0.3.0", path = "../ruma-serde" }
 serde = { version = "1.0.114", features = ["derive"] }
 serde_json = "1.0.57"
diff --git a/ruma-push-gateway-api/Cargo.toml b/ruma-push-gateway-api/Cargo.toml
index d5a9d9be..8e41281c 100644
--- a/ruma-push-gateway-api/Cargo.toml
+++ b/ruma-push-gateway-api/Cargo.toml
@@ -16,7 +16,7 @@ ruma-api = { version = "=0.17.0-alpha.1", path = "../ruma-api" }
 ruma-common = { version = "0.2.0", path = "../ruma-common" }
 ruma-events = { version = "0.22.0-alpha.1", path = "../ruma-events" }
 ruma-identifiers = { version = "0.17.4", path = "../ruma-identifiers" }
-ruma-serde = { version = "0.2.3", path = "../ruma-serde" }
+ruma-serde = { version = "0.3.0", path = "../ruma-serde" }
 serde = { version = "1.0.118", features = ["derive"] }
 serde_json = "1.0.60"
 
diff --git a/ruma-serde-macros/Cargo.toml b/ruma-serde-macros/Cargo.toml
index 67912bdc..7e9773cb 100644
--- a/ruma-serde-macros/Cargo.toml
+++ b/ruma-serde-macros/Cargo.toml
@@ -1,14 +1,13 @@
 [package]
-authors = ["Jonas Platte <jplatte@posteo.de>",]
+authors = ["Jonas Platte <jplatte@posteo.de>"]
 categories = ["api-bindings", "web-programming"]
 description = "Procedural macros for ruma-serde."
 homepage = "https://www.ruma.io/"
 keywords = ["matrix", "chat", "messaging", "ruma"]
 license = "MIT"
 name = "ruma-serde-macros"
-readme = "README.md"
 repository = "https://github.com/ruma/ruma"
-version = "0.2.3"
+version = "0.3.0"
 edition = "2018"
 
 [lib]
diff --git a/ruma-serde/CHANGELOG.md b/ruma-serde/CHANGELOG.md
new file mode 100644
index 00000000..f5bb81da
--- /dev/null
+++ b/ruma-serde/CHANGELOG.md
@@ -0,0 +1,5 @@
+# 0.3.0
+
+Breaking changes:
+
+* Upgrade `js_int` to 0.2.0
diff --git a/ruma-serde/Cargo.toml b/ruma-serde/Cargo.toml
index 61ba6fe8..c5d1c0a5 100644
--- a/ruma-serde/Cargo.toml
+++ b/ruma-serde/Cargo.toml
@@ -10,16 +10,16 @@ authors = [
 ]
 homepage = "https://www.ruma.io/"
 repository = "https://github.com/ruma/ruma"
-version = "0.2.3"
+version = "0.3.0"
 edition = "2018"
 
 [dependencies]
 form_urlencoded = "1.0.0"
 js_int = { version = "0.2.0", features = ["serde"] }
 itoa = "0.4.6"
-ruma-serde-macros = { version = "=0.2.3", path = "../ruma-serde-macros" }
+ruma-serde-macros = { version = "=0.3.0", path = "../ruma-serde-macros" }
 serde = { version = "1.0.118", features = ["derive"] }
-serde_json = { version = "1.0.60", features = ["raw_value"] }
+serde_json = { version = "1.0.61", features = ["raw_value"] }
 
 [dev-dependencies]
 matches = "0.1.8"
diff --git a/ruma-signatures/Cargo.toml b/ruma-signatures/Cargo.toml
index 4b80e5b4..a417475d 100644
--- a/ruma-signatures/Cargo.toml
+++ b/ruma-signatures/Cargo.toml
@@ -16,6 +16,6 @@ version = "0.6.0-dev.1"
 base64 = "0.13.0"
 ring = "0.16.19"
 ruma-identifiers = { version = "0.17.4", path = "../ruma-identifiers" }
-ruma-serde = { version = "0.2.3", path = "../ruma-serde" }
+ruma-serde = { version = "0.3.0", path = "../ruma-serde" }
 serde_json = "1.0.60"
 untrusted = "0.7.1"
diff --git a/ruma/Cargo.toml b/ruma/Cargo.toml
index 90294e4a..f2035868 100644
--- a/ruma/Cargo.toml
+++ b/ruma/Cargo.toml
@@ -18,7 +18,7 @@ js_int = "0.2.0"
 
 ruma-common = { version = "0.2.0", path = "../ruma-common" }
 ruma-identifiers = { version = "0.17.4", path = "../ruma-identifiers", features = ["serde"] }
-ruma-serde = { version = "0.2.3", path = "../ruma-serde" }
+ruma-serde = { version = "0.3.0", path = "../ruma-serde" }
 
 ruma-events = { version = "=0.22.0-alpha.1", path = "../ruma-events", optional = true }
 ruma-signatures = { version = "0.6.0-dev.1", path = "../ruma-signatures", optional = true }
@@ -53,7 +53,11 @@ unstable-exhaustive-types = [
   "ruma-federation-api/unstable-exhaustive-types",
   "ruma-common/unstable-exhaustive-types",
 ]
-unstable-pre-spec = ["ruma-client-api/unstable-pre-spec", "ruma-events/unstable-pre-spec", "ruma-federation-api/unstable-pre-spec"]
+unstable-pre-spec = [
+  "ruma-client-api/unstable-pre-spec",
+  "ruma-events/unstable-pre-spec",
+  "ruma-federation-api/unstable-pre-spec",
+]
 unstable-synapse-quirks = [
   "ruma-client-api/unstable-synapse-quirks",
   "ruma-common/unstable-synapse-quirks",