diff --git a/.gdbinit b/.gdbinit
index 26a03e4..6924dab 100644
--- a/.gdbinit
+++ b/.gdbinit
@@ -2,5 +2,5 @@ target remote :3333
 monitor arm semihosting enable
 set print asm-demangle on
 load
-#break main
+break main
 continue
diff --git a/src/display/Cargo.toml b/src/display/Cargo.toml
index 261d5c5..6da3b6e 100644
--- a/src/display/Cargo.toml
+++ b/src/display/Cargo.toml
@@ -1,9 +1,10 @@
 [package]
 name = "display"
-version = "0.1.0"
+version = "0.2.0"
+edition = "2018"
 
 [dependencies]
 cortex-m-rt="~0.6"
 cortex-m-semihosting="~0.3"
 panic-semihosting = "~0.5"
-microbit="~0.6"
+microbit="~0.8"
diff --git a/src/display/src/main.rs b/src/display/src/main.rs
index 35a7eb5..12ea853 100644
--- a/src/display/src/main.rs
+++ b/src/display/src/main.rs
@@ -69,10 +69,10 @@ impl Display {
     /// Clear display
     pub fn clear(&mut self) {
         for row in &mut self.rows {
-            row.set_low();
+            row.set_low().unwrap();
         }
         for col in &mut self.cols {
-            col.set_high();
+            col.set_high().unwrap();
         }
     }
 
@@ -97,18 +97,18 @@ impl Display {
         let loops = duration_ms / (self.rows.len() as u32 * self.delay_ms);
         for _ in 0..loops {
             for (row_line, led_matrix_row) in self.rows.iter_mut().zip(led_matrix.iter()) {
-                row_line.set_high();
+                row_line.set_high().unwrap();
                 for (col_line, led_matrix_val) in self.cols.iter_mut().zip(led_matrix_row.iter()) {
                     // We are keeping it simple, and not adding brightness
                     if *led_matrix_val > 0 {
-                        col_line.set_low();
+                        col_line.set_low().unwrap();
                     }
                 }
                 delay.delay_ms(self.delay_ms);
                 for col_line in &mut self.cols {
-                    col_line.set_high();
+                    col_line.set_high().unwrap();
                 }
-                row_line.set_low();
+                row_line.set_low().unwrap();
             }
         }
     }
@@ -120,15 +120,15 @@ fn main() -> ! {
     writeln!(stdout, "Start").unwrap();
     if let Some(p) = microbit::Peripherals::take() {
         // Split GPIO
-        let mut gpio = p.GPIO.split();
+        let gpio = p.GPIO.split();
         
         // Configure RX and TX pins accordingly
         let tx = gpio.pin24.into_push_pull_output().downgrade();
         let rx = gpio.pin25.into_floating_input().downgrade();
         // Configure serial communication
         let (mut tx, _) = serial::Serial::uart0(p.UART0, tx, rx, BAUD115200).split();
-        writeln!(tx, "");
-        writeln!(tx, "Init");
+        writeln!(tx, "").unwrap();
+        writeln!(tx, "Init").unwrap();
         
         // Create delay provider
         let mut delay = Delay::new(p.TIMER0);
@@ -179,10 +179,10 @@ fn main() -> ! {
             [0, 1, 1, 1, 0],
         ];
 
-        writeln!(tx, "Starting!");
+        writeln!(tx, "Starting!").unwrap();
 
         loop {
-            writeln!(tx, "I <3 Rust on the micro:bit!");
+            writeln!(tx, "I <3 Rust on the micro:bit!").unwrap();
             leds.display(&mut delay, letter_I, 1000);
             leds.display(&mut delay, heart, 1000);
             leds.display(&mut delay, letter_U, 1000);
diff --git a/src/getting-started/Cargo.toml b/src/getting-started/Cargo.toml
index 652b2de..9ade1fd 100644
--- a/src/getting-started/Cargo.toml
+++ b/src/getting-started/Cargo.toml
@@ -1,6 +1,7 @@
 [package]
 name = "start"
-version = "0.2.0"
+version = "0.3.0"
+edition = "2018"
 
 [dependencies]
 panic-halt = "~0.2"
diff --git a/src/hello-world/Cargo.toml b/src/hello-world/Cargo.toml
index 4a939ce..3954304 100644
--- a/src/hello-world/Cargo.toml
+++ b/src/hello-world/Cargo.toml
@@ -1,9 +1,10 @@
 [package]
 name = "hello"
-version = "0.2.0"
+version = "0.3.0"
+edition = "2018"
 
 [dependencies]
-microbit="~0.6"
+microbit="~0.8"
 cortex-m-rt="~0.6"
 cortex-m-semihosting="~0.3"
 panic-semihosting = "~0.5"
diff --git a/src/hello-world/src/main.rs b/src/hello-world/src/main.rs
index 253bdcb..ac1d81d 100644
--- a/src/hello-world/src/main.rs
+++ b/src/hello-world/src/main.rs
@@ -20,20 +20,20 @@ fn main() -> ! {
     writeln!(stdout, "Start").unwrap();
     if let Some(p) = microbit::Peripherals::take() {
         // Split GPIO
-        let mut gpio = p.GPIO.split();
+        let gpio = p.GPIO.split();
         // Configure RX and TX pins accordingly
         let tx = gpio.pin24.into_push_pull_output().downgrade();
         let rx = gpio.pin25.into_floating_input().downgrade();
         // Configure serial communication
         let (mut tx, _) = serial::Serial::uart0(p.UART0, tx, rx, BAUD115200).split();
-        write!(tx, "serial - start\r\n");
+        write!(tx, "serial - start\r\n").unwrap();
         // Get row and column for display
         let mut led = gpio.pin13.into_push_pull_output();
         let _ = gpio.pin4.into_push_pull_output();
         // Set row high (column starts low)
-        led.set_high();
+        led.set_high().unwrap();
         // Write string with newline and carriage return
-        write!(tx, "serial - LED on\r\n");
+        write!(tx, "serial - LED on\r\n").unwrap();
     }
     panic!("End");
 }
diff --git a/src/microbit/Cargo.toml b/src/microbit/Cargo.toml
index 7a57323..ef9ad35 100644
--- a/src/microbit/Cargo.toml
+++ b/src/microbit/Cargo.toml
@@ -1,10 +1,11 @@
 [package]
-name = "microbit"
-version = "0.1.0"
+name = "micro"
+version = "0.2.0"
+edition = "2018"
 
 [dependencies]
 cortex-m-rt="~0.6"
 cortex-m-semihosting="~0.3"
-panic-abort = "~0.3"
+panic-halt = "~0.2"
 panic-semihosting = "~0.5"
-microbit="~0.6"
+microbit="~0.8"
diff --git a/src/microbit/examples/buttons.rs b/src/microbit/examples/buttons.rs
index 1b75469..000ece1 100644
--- a/src/microbit/examples/buttons.rs
+++ b/src/microbit/examples/buttons.rs
@@ -1,7 +1,7 @@
 #![no_std]
 #![no_main]
 
-extern crate panic_abort;
+extern crate panic_halt;
 extern crate cortex_m_rt as rt;
 extern crate microbit;
 
@@ -16,7 +16,7 @@ use microbit::hal::serial::BAUD115200;
 fn main() -> ! {
     if let Some(p) = microbit::Peripherals::take() {
         // Split GPIO
-        let mut gpio = p.GPIO.split();
+        let gpio = p.GPIO.split();
         // Configure RX and TX pins accordingly
         let tx = gpio.pin24.into_push_pull_output().downgrade();
         let rx = gpio.pin25.into_floating_input().downgrade();
diff --git a/src/microbit/examples/buttons_poll.rs b/src/microbit/examples/buttons_poll.rs
index fbeb5b0..2e356d7 100644
--- a/src/microbit/examples/buttons_poll.rs
+++ b/src/microbit/examples/buttons_poll.rs
@@ -1,7 +1,7 @@
 #![no_std]
 #![no_main]
 
-extern crate panic_abort;
+extern crate panic_halt;
 extern crate cortex_m_rt as rt;
 extern crate microbit;
 
diff --git a/src/microbit/examples/display_blocking.rs b/src/microbit/examples/display_blocking.rs
index 41cce1a..d864e89 100644
--- a/src/microbit/examples/display_blocking.rs
+++ b/src/microbit/examples/display_blocking.rs
@@ -5,7 +5,7 @@
 extern crate microbit;
 extern crate cortex_m_rt as rt;
 extern crate cortex_m_semihosting as sh;
-extern crate panic_abort;
+extern crate panic_halt;
 
 use core::fmt::Write;
 use rt::entry;
diff --git a/src/serial/Cargo.toml b/src/serial/Cargo.toml
index cb62ac3..b1b714e 100644
--- a/src/serial/Cargo.toml
+++ b/src/serial/Cargo.toml
@@ -1,10 +1,11 @@
 [package]
 name = "serial"
-version = "0.1.0"
+version = "0.2.0"
+edition = "2018"
 
 [dependencies]
-heapless="~0.3"
+heapless="~0.5"
 cortex-m-rt="~0.6"
 cortex-m-semihosting="~0.3"
 panic-semihosting = "~0.5"
-microbit="~0.6"
+microbit="~0.8"
diff --git a/src/serial/src/main.rs b/src/serial/src/main.rs
index 4773c79..71494fd 100644
--- a/src/serial/src/main.rs
+++ b/src/serial/src/main.rs
@@ -13,7 +13,7 @@ use sh::hio;
 use microbit::hal::prelude::*;
 use microbit::hal::serial;
 use microbit::hal::serial::BAUD115200;
-use microbit::nb::block;
+use microbit::block;
 
 #[entry]
 fn main() -> ! {
@@ -21,16 +21,16 @@ fn main() -> ! {
     writeln!(stdout, "Start").unwrap();
     if let Some(p) = microbit::Peripherals::take() {
         // Split GPIO
-        let mut gpio = p.GPIO.split();
+        let gpio = p.GPIO.split();
         // Configure RX and TX pins accordingly
         let tx = gpio.pin24.into_push_pull_output().downgrade();
         let rx = gpio.pin25.into_floating_input().downgrade();
         // Configure serial communication
         let (mut tx, mut rx) = serial::Serial::uart0(p.UART0, tx, rx, BAUD115200).split();
-        writeln!(tx, "Start");
+        writeln!(tx, "Start").unwrap();
         loop {
             let val = block!(rx.read()).unwrap();
-            block!(tx.write(val));
+            block!(tx.write(val)).unwrap();
         }
     }
     panic!("End");
diff --git a/src/setup/README.md b/src/setup/README.md
index c896bab..8bdd7bd 100644
--- a/src/setup/README.md
+++ b/src/setup/README.md
@@ -38,18 +38,12 @@ Next, follow OS-agnostic installation instructions for a few of the tools:
 
 Install rustup by following the instructions at [https://rustup.rs](https://rustup.rs).
 
-Then, install or switch to the nightly channel.
-
-``` shell
-$ rustup default nightly
-```
-
-**NOTE** Make sure you have a nightly newer than `nightly-2018-10-12`.
+**NOTE** Make sure you have a recent version, but only `1.39.0` is validated.
 `rustc -V` should return a date newer than the one shown below:
 
 ``` shell
 $ rustc -V
-rustc 1.31.0-nightly (2c2e2c57d 2018-10-12)
+rustc 1.39.0 (4560ea788 2019-11-04)
 ```
 
 ### OS specific instructions