diff --git a/src/activity_pub/activity.rs b/src/activity_pub/activity.rs
index 098c4bc0..458cc2f0 100644
--- a/src/activity_pub/activity.rs
+++ b/src/activity_pub/activity.rs
@@ -11,12 +11,14 @@ impl Activity {
     }
 }
 
+#[allow(dead_code)]
 pub struct Create<'a, T, U> where T: Actor + 'static, U: Object {
     by: &'a T,
     object: U
 }
 
 impl<'a, T: Actor, U: Object> Create<'a, T, U> {
+    #[allow(dead_code)]
     pub fn new(by: &T, obj: U) -> Create<T, U> {
         Create {
             by: by,
diff --git a/src/activity_pub/sign.rs b/src/activity_pub/sign.rs
index c1df72f0..54bb5d32 100644
--- a/src/activity_pub/sign.rs
+++ b/src/activity_pub/sign.rs
@@ -1,7 +1,7 @@
 use base64;
 use hex;
 use chrono::Utc;
-use openssl::sha::{sha256, sha512};
+use openssl::sha::sha256;
 use serde_json;
 
 // (Comments are from the Mastodon source code, to remember what to do.)
diff --git a/src/main.rs b/src/main.rs
index b70d8aee..09af3529 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -12,11 +12,8 @@ extern crate dotenv;
 extern crate openssl;
 extern crate rocket;
 extern crate rocket_contrib;
-#[feature(custom_attribute)]
 extern crate serde;
 #[macro_use]
-extern crate serde_derive;
-#[macro_use]
 extern crate serde_json;
 
 use diesel::pg::PgConnection;
@@ -32,9 +29,6 @@ mod schema;
 mod routes;
 mod utils;
 
-use db_conn::DbConn;
-use models::instance::*;
-
 type PgPool = Pool<ConnectionManager<PgConnection>>;
 
 /// Initializes a database pool.
diff --git a/src/models/blogs.rs b/src/models/blogs.rs
index 24ae6e00..fd247baa 100644
--- a/src/models/blogs.rs
+++ b/src/models/blogs.rs
@@ -72,7 +72,7 @@ impl Blog {
         Outbox::new(self.compute_outbox(conn), self.get_activities(conn))
     }
 
-    fn get_activities(&self, conn: &PgConnection) -> Vec<Activity> {
+    fn get_activities(&self, _conn: &PgConnection) -> Vec<Activity> {
         vec![]
     }
 }