diff --git a/.rustfmt.toml b/.rustfmt.toml
deleted file mode 100644
index 7d2cf549..00000000
--- a/.rustfmt.toml
+++ /dev/null
@@ -1 +0,0 @@
-merge_imports = true
diff --git a/.travis.yml b/.travis.yml
index 44998ebc..e8d453d5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,12 @@
 language: "rust"
+before_script:
+  - "rustup component add rustfmt"
+  - "rustup component add clippy"
+script:
+  - "cargo fmt --all -- --check"
+  - "cargo clippy --all-targets --all-features -- -D warnings"
+  - "cargo build --verbose"
+  - "cargo test --verbose"
 notifications:
   email: false
   irc:
diff --git a/src/lib.rs b/src/lib.rs
index 86c59f30..4ca111ab 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -2,7 +2,31 @@
 //! endpoint in the [Matrix](https://matrix.org/) client API specification. These types can be
 //! shared by client and server code.
 
-#![deny(missing_debug_implementations, missing_docs)]
+#![deny(
+    missing_copy_implementations,
+    missing_debug_implementations,
+    missing_docs,
+    warnings
+)]
+#![warn(
+    clippy::empty_line_after_outer_attr,
+    clippy::expl_impl_clone_on_copy,
+    clippy::if_not_else,
+    clippy::items_after_statements,
+    clippy::match_same_arms,
+    clippy::mem_forget,
+    clippy::missing_docs_in_private_items,
+    clippy::multiple_inherent_impl,
+    clippy::mut_mut,
+    clippy::needless_borrow,
+    clippy::needless_continue,
+    clippy::single_match_else,
+    clippy::unicode_not_nfc,
+    clippy::use_self,
+    clippy::used_underscore_binding,
+    clippy::wrong_pub_self_convention,
+    clippy::wrong_self_convention
+)]
 
 pub mod r0;
 pub mod unversioned;
diff --git a/src/r0/room/create_room.rs b/src/r0/room/create_room.rs
index 8737dc10..a54f31f5 100644
--- a/src/r0/room/create_room.rs
+++ b/src/r0/room/create_room.rs
@@ -53,7 +53,7 @@ ruma_api! {
 }
 
 /// Extra options to be added to the `m.room.create` event.
-#[derive(Clone, Debug, Deserialize, Serialize)]
+#[derive(Clone, Copy, Debug, Deserialize, Serialize)]
 pub struct CreationContent {
     /// Whether users on other servers can join this room.
     ///
diff --git a/src/r0/search/search_events.rs b/src/r0/search/search_events.rs
index fd51bbcb..36814128 100644
--- a/src/r0/search/search_events.rs
+++ b/src/r0/search/search_events.rs
@@ -72,7 +72,7 @@ pub struct Criteria {
 }
 
 /// Configures whether any context for the events returned are included in the response.
-#[derive(Clone, Debug, Deserialize, Serialize)]
+#[derive(Clone, Copy, Debug, Deserialize, Serialize)]
 pub struct EventContext {
     /// How many events after the result are returned.
     pub after_limit: u64,
@@ -103,7 +103,7 @@ pub struct EventContextResult {
 }
 
 /// A grouping for partioning the result set.
-#[derive(Clone, Debug, Deserialize, Serialize)]
+#[derive(Clone, Copy, Debug, Deserialize, Serialize)]
 pub struct Grouping {
     /// The key within events to use for this grouping.
     pub key: GroupingKey,
diff --git a/src/r0/session/login.rs b/src/r0/session/login.rs
index a91fb1e1..fd76156c 100644
--- a/src/r0/session/login.rs
+++ b/src/r0/session/login.rs
@@ -53,7 +53,7 @@ ruma_api! {
 }
 
 /// The medium of a third party identifier.
-#[derive(Clone, Debug, Deserialize, Serialize)]
+#[derive(Clone, Copy, Debug, Deserialize, Serialize)]
 pub enum Medium {
     /// An email address.
     #[serde(rename = "email")]
@@ -61,7 +61,7 @@ pub enum Medium {
 }
 
 /// The authentication mechanism.
-#[derive(Clone, Debug, Deserialize, Serialize)]
+#[derive(Clone, Copy, Debug, Deserialize, Serialize)]
 pub enum LoginType {
     /// A password is supplied to authenticate.
     #[serde(rename = "m.login.password")]
diff --git a/src/r0/sync/get_message_events.rs b/src/r0/sync/get_message_events.rs
index d378796f..1078972b 100644
--- a/src/r0/sync/get_message_events.rs
+++ b/src/r0/sync/get_message_events.rs
@@ -52,7 +52,7 @@ ruma_api! {
 }
 
 /// The direction to return events from.
-#[derive(Clone, Debug, Deserialize, Serialize)]
+#[derive(Clone, Copy, Debug, Deserialize, Serialize)]
 pub enum Direction {
     /// Return events backwards in time from the requested `from` token.
     #[serde(rename = "b")]
diff --git a/src/r0/sync/sync_events.rs b/src/r0/sync/sync_events.rs
index 4ee05169..f152ca04 100644
--- a/src/r0/sync/sync_events.rs
+++ b/src/r0/sync/sync_events.rs
@@ -57,7 +57,7 @@ ruma_api! {
 }
 
 /// Whether to set presence or not during sync.
-#[derive(Clone, Debug, Deserialize, Serialize)]
+#[derive(Clone, Copy, Debug, Deserialize, Serialize)]
 pub enum SetPresence {
     /// Do not set the presence of the user calling this API.
     #[serde(rename = "offline")]
@@ -80,16 +80,18 @@ pub enum Filter {
     // (there are probably some corner cases like leading whitespace)
     #[serde(with = "filter_def_serde")]
     /// A complete filter definition serialized to JSON.
-    FilterDefinition(FilterDefinition),
+    FilterDefinition(Box<FilterDefinition>),
     /// The ID of a filter saved on the server.
     FilterId(String),
 }
 
+/// Serialization and deserialization logic for filter definitions.
 mod filter_def_serde {
     use serde::{de::Error as _, ser::Error as _, Deserialize, Deserializer, Serializer};
 
     use crate::r0::filter::FilterDefinition;
 
+    /// Serialization logic for filter definitions.
     pub fn serialize<S>(filter_def: &FilterDefinition, serializer: S) -> Result<S::Ok, S::Error>
     where
         S: Serializer,
@@ -98,12 +100,15 @@ mod filter_def_serde {
         serializer.serialize_str(&string)
     }
 
-    pub fn deserialize<'de, D>(deserializer: D) -> Result<FilterDefinition, D::Error>
+    /// Deserialization logic for filter definitions.
+    pub fn deserialize<'de, D>(deserializer: D) -> Result<Box<FilterDefinition>, D::Error>
     where
         D: Deserializer<'de>,
     {
         let filter_str = <&str>::deserialize(deserializer)?;
-        serde_json::from_str(filter_str).map_err(D::Error::custom)
+        serde_json::from_str(filter_str)
+            .map(Box::new)
+            .map_err(D::Error::custom)
     }
 }
 
@@ -147,7 +152,7 @@ pub struct JoinedRoom {
 }
 
 /// unread notifications count
-#[derive(Clone, Debug, Deserialize, Serialize)]
+#[derive(Clone, Copy, Debug, Deserialize, Serialize)]
 pub struct UnreadNotificationsCount {
     /// The number of unread notifications for this room with the highlight flag set.
     #[serde(skip_serializing_if = "Option::is_none")]
diff --git a/src/unversioned.rs b/src/unversioned.rs
index e77bcd06..1622a72d 100644
--- a/src/unversioned.rs
+++ b/src/unversioned.rs
@@ -1,4 +1,4 @@
 //! Endpoints that cannot change with new versions of the Matrix specification.
 
-pub mod get_supported_versions;
 pub mod discover_homeserver;
+pub mod get_supported_versions;