diff --git a/Cargo.toml b/Cargo.toml
index e04c30c..8617d8d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,7 @@
 [package]
 name = "ruduino"
 version = "0.1.1"
+edition = "2018"
 authors = [
   "The AVR-Rust Project Developers",
   "Jake Goulding <jake.goulding@gmail.com>",
diff --git a/core_generator/build.rs b/core_generator/build.rs
index 47925d2..7e19bcc 100644
--- a/core_generator/build.rs
+++ b/core_generator/build.rs
@@ -91,8 +91,7 @@ fn generate_cores_mod_rs(mcus: &[Mcu]) -> Result<(), io::Error> {
 fn write_core_module(mcu: &Mcu, w: &mut dyn Write) -> Result<(), io::Error> {
     writeln!(w, "//! Core for {}.", mcu.device.name)?;
     writeln!(w)?;
-    writeln!(w, "use {{RegisterBits, Register}};")?;
-    writeln!(w, "use modules;")?;
+    writeln!(w, "use crate::{{modules, RegisterBits, Register}};")?;
     writeln!(w)?;
 
     gen::write_registers(mcu, w)?;
diff --git a/core_generator/gen.rs b/core_generator/gen.rs
index 840684b..e2e37a2 100644
--- a/core_generator/gen.rs
+++ b/core_generator/gen.rs
@@ -48,7 +48,7 @@ pub fn write_pins(mcu: &Mcu, w: &mut dyn Write) -> Result<(), io::Error> {
     if let Some(port) = mcu.peripheral("PORT") {
         writeln!(w, "pub mod port {{")?;
         writeln!(w, "    use super::*;")?;
-        writeln!(w, "    use Pin;")?;
+        writeln!(w, "    use crate::Pin;")?;
         writeln!(w)?;
 
         for instance in port.instances.iter() {
diff --git a/src/modules/spi/clock.rs b/src/modules/spi/clock.rs
index 92fe90c..3d6ba35 100644
--- a/src/modules/spi/clock.rs
+++ b/src/modules/spi/clock.rs
@@ -1,4 +1,4 @@
-use config;
+use crate::config;
 
 /// A clock mask.
 ///
diff --git a/src/modules/spi/mod.rs b/src/modules/spi/mod.rs
index 73dac79..3104210 100644
--- a/src/modules/spi/mod.rs
+++ b/src/modules/spi/mod.rs
@@ -4,7 +4,7 @@ mod clock;
 // FIXME: Start using this module or delete!!!
 #[allow(dead_code)] mod settings;
 
-use {Register, Pin};
+use crate::{Register, Pin};
 
 /// An SPI module.
 ///
diff --git a/src/modules/timer/timer16.rs b/src/modules/timer/timer16.rs
index 961f75b..f7cb27e 100644
--- a/src/modules/timer/timer16.rs
+++ b/src/modules/timer/timer16.rs
@@ -1,4 +1,4 @@
-use {RegisterBits, Register};
+use crate::{RegisterBits, Register};
 use core::marker;
 
 /// A 16-bit timer.
diff --git a/src/modules/timer/timer8.rs b/src/modules/timer/timer8.rs
index a02f6d5..8f77114 100644
--- a/src/modules/timer/timer8.rs
+++ b/src/modules/timer/timer8.rs
@@ -1,4 +1,4 @@
-use {RegisterBits, Register};
+use crate::{RegisterBits, Register};
 use core::marker;
 
 /// A 8-bit timer.
diff --git a/src/modules/usart.rs b/src/modules/usart.rs
index 7e8bc77..5a1078d 100644
--- a/src/modules/usart.rs
+++ b/src/modules/usart.rs
@@ -1,4 +1,4 @@
-use Register;
+use crate::Register;
 
 pub trait HardwareUsart {
     /// The USART data register.
diff --git a/src/pin.rs b/src/pin.rs
index 806ba99..a63d4b7 100644
--- a/src/pin.rs
+++ b/src/pin.rs
@@ -1,4 +1,4 @@
-use Register;
+use crate::Register;
 
 /// Represents whether a pin is an input or an output.
 pub enum DataDirection {
diff --git a/src/prelude.rs b/src/prelude.rs
index a5e529e..5d10476 100644
--- a/src/prelude.rs
+++ b/src/prelude.rs
@@ -1,4 +1,4 @@
 //! Re-exports commonly-used APIs that can be imported at once.
 
-pub use interrupt::without_interrupts;
+pub use crate::interrupt::without_interrupts;