diff --git a/src/display/Cargo.toml b/src/display/Cargo.toml
index 261d5c5..192a272 100644
--- a/src/display/Cargo.toml
+++ b/src/display/Cargo.toml
@@ -6,4 +6,4 @@ version = "0.1.0"
 cortex-m-rt="~0.6"
 cortex-m-semihosting="~0.3"
 panic-semihosting = "~0.5"
-microbit="~0.6"
+microbit="~0.7"
diff --git a/src/hello-world/Cargo.toml b/src/hello-world/Cargo.toml
index 4a939ce..fcfe7f3 100644
--- a/src/hello-world/Cargo.toml
+++ b/src/hello-world/Cargo.toml
@@ -3,7 +3,7 @@ name = "hello"
 version = "0.2.0"
 
 [dependencies]
-microbit="~0.6"
+microbit="~0.7"
 cortex-m-rt="~0.6"
 cortex-m-semihosting="~0.3"
 panic-semihosting = "~0.5"
diff --git a/src/microbit/Cargo.toml b/src/microbit/Cargo.toml
index 7a57323..36f114e 100644
--- a/src/microbit/Cargo.toml
+++ b/src/microbit/Cargo.toml
@@ -7,4 +7,4 @@ cortex-m-rt="~0.6"
 cortex-m-semihosting="~0.3"
 panic-abort = "~0.3"
 panic-semihosting = "~0.5"
-microbit="~0.6"
+microbit="~0.7"
diff --git a/src/serial/Cargo.toml b/src/serial/Cargo.toml
index cb62ac3..3de0ebc 100644
--- a/src/serial/Cargo.toml
+++ b/src/serial/Cargo.toml
@@ -3,8 +3,8 @@ name = "serial"
 version = "0.1.0"
 
 [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="~0.7"