diff --git a/04_zero_overhead_abstraction/Cargo.lock b/04_zero_overhead_abstraction/Cargo.lock
index dd0cd577..70708c19 100644
--- a/04_zero_overhead_abstraction/Cargo.lock
+++ b/04_zero_overhead_abstraction/Cargo.lock
@@ -2,9 +2,9 @@
 # It is not intended for manual editing.
 [[package]]
 name = "cortex-a"
-version = "5.1.1"
+version = "5.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7c9b7504606c9e83a6b35e6f99db890084baf13fbbed67603fcc2a62b2cfe62b"
+checksum = "d33a61602f83c3fff3e092967ad4d5d820a9fea7bc418e119616872085fe731d"
 dependencies = [
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 ]
diff --git a/05_safe_globals/Cargo.lock b/05_safe_globals/Cargo.lock
index dd0cd577..70708c19 100644
--- a/05_safe_globals/Cargo.lock
+++ b/05_safe_globals/Cargo.lock
@@ -2,9 +2,9 @@
 # It is not intended for manual editing.
 [[package]]
 name = "cortex-a"
-version = "5.1.1"
+version = "5.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7c9b7504606c9e83a6b35e6f99db890084baf13fbbed67603fcc2a62b2cfe62b"
+checksum = "d33a61602f83c3fff3e092967ad4d5d820a9fea7bc418e119616872085fe731d"
 dependencies = [
  "register",
 ]
diff --git a/06_drivers_gpio_uart/Cargo.lock b/06_drivers_gpio_uart/Cargo.lock
index e2d680a7..e87b55af 100644
--- a/06_drivers_gpio_uart/Cargo.lock
+++ b/06_drivers_gpio_uart/Cargo.lock
@@ -2,9 +2,9 @@
 # It is not intended for manual editing.
 [[package]]
 name = "cortex-a"
-version = "5.1.1"
+version = "5.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7c9b7504606c9e83a6b35e6f99db890084baf13fbbed67603fcc2a62b2cfe62b"
+checksum = "d33a61602f83c3fff3e092967ad4d5d820a9fea7bc418e119616872085fe731d"
 dependencies = [
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 ]
diff --git a/07_uart_chainloader/Cargo.lock b/07_uart_chainloader/Cargo.lock
index e2d680a7..e87b55af 100644
--- a/07_uart_chainloader/Cargo.lock
+++ b/07_uart_chainloader/Cargo.lock
@@ -2,9 +2,9 @@
 # It is not intended for manual editing.
 [[package]]
 name = "cortex-a"
-version = "5.1.1"
+version = "5.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7c9b7504606c9e83a6b35e6f99db890084baf13fbbed67603fcc2a62b2cfe62b"
+checksum = "d33a61602f83c3fff3e092967ad4d5d820a9fea7bc418e119616872085fe731d"
 dependencies = [
  "register",
 ]
diff --git a/07_uart_chainloader/demo_payload_rpi3.img b/07_uart_chainloader/demo_payload_rpi3.img
index 0719de41..80df7c19 100755
Binary files a/07_uart_chainloader/demo_payload_rpi3.img and b/07_uart_chainloader/demo_payload_rpi3.img differ
diff --git a/07_uart_chainloader/demo_payload_rpi4.img b/07_uart_chainloader/demo_payload_rpi4.img
index c8d8f968..54fe2b81 100755
Binary files a/07_uart_chainloader/demo_payload_rpi4.img and b/07_uart_chainloader/demo_payload_rpi4.img differ
diff --git a/08_timestamps/Cargo.lock b/08_timestamps/Cargo.lock
index e2d680a7..e87b55af 100644
--- a/08_timestamps/Cargo.lock
+++ b/08_timestamps/Cargo.lock
@@ -2,9 +2,9 @@
 # It is not intended for manual editing.
 [[package]]
 name = "cortex-a"
-version = "5.1.1"
+version = "5.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7c9b7504606c9e83a6b35e6f99db890084baf13fbbed67603fcc2a62b2cfe62b"
+checksum = "d33a61602f83c3fff3e092967ad4d5d820a9fea7bc418e119616872085fe731d"
 dependencies = [
  "register",
 ]
diff --git a/09_hw_debug_JTAG/Cargo.lock b/09_hw_debug_JTAG/Cargo.lock
index e2d680a7..e87b55af 100644
--- a/09_hw_debug_JTAG/Cargo.lock
+++ b/09_hw_debug_JTAG/Cargo.lock
@@ -2,9 +2,9 @@
 # It is not intended for manual editing.
 [[package]]
 name = "cortex-a"
-version = "5.1.1"
+version = "5.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7c9b7504606c9e83a6b35e6f99db890084baf13fbbed67603fcc2a62b2cfe62b"
+checksum = "d33a61602f83c3fff3e092967ad4d5d820a9fea7bc418e119616872085fe731d"
 dependencies = [
  "register",
 ]
diff --git a/10_privilege_level/Cargo.lock b/10_privilege_level/Cargo.lock
index e2d680a7..e87b55af 100644
--- a/10_privilege_level/Cargo.lock
+++ b/10_privilege_level/Cargo.lock
@@ -2,9 +2,9 @@
 # It is not intended for manual editing.
 [[package]]
 name = "cortex-a"
-version = "5.1.1"
+version = "5.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7c9b7504606c9e83a6b35e6f99db890084baf13fbbed67603fcc2a62b2cfe62b"
+checksum = "d33a61602f83c3fff3e092967ad4d5d820a9fea7bc418e119616872085fe731d"
 dependencies = [
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 ]
diff --git a/11_virtual_mem_part1_identity_mapping/Cargo.lock b/11_virtual_mem_part1_identity_mapping/Cargo.lock
index e2d680a7..e87b55af 100644
--- a/11_virtual_mem_part1_identity_mapping/Cargo.lock
+++ b/11_virtual_mem_part1_identity_mapping/Cargo.lock
@@ -2,9 +2,9 @@
 # It is not intended for manual editing.
 [[package]]
 name = "cortex-a"
-version = "5.1.1"
+version = "5.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7c9b7504606c9e83a6b35e6f99db890084baf13fbbed67603fcc2a62b2cfe62b"
+checksum = "d33a61602f83c3fff3e092967ad4d5d820a9fea7bc418e119616872085fe731d"
 dependencies = [
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 ]
diff --git a/12_exceptions_part1_groundwork/Cargo.lock b/12_exceptions_part1_groundwork/Cargo.lock
index e2d680a7..e87b55af 100644
--- a/12_exceptions_part1_groundwork/Cargo.lock
+++ b/12_exceptions_part1_groundwork/Cargo.lock
@@ -2,9 +2,9 @@
 # It is not intended for manual editing.
 [[package]]
 name = "cortex-a"
-version = "5.1.1"
+version = "5.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7c9b7504606c9e83a6b35e6f99db890084baf13fbbed67603fcc2a62b2cfe62b"
+checksum = "d33a61602f83c3fff3e092967ad4d5d820a9fea7bc418e119616872085fe731d"
 dependencies = [
  "register",
 ]
diff --git a/13_integrated_testing/Cargo.lock b/13_integrated_testing/Cargo.lock
index d4776fc2..b5c77499 100644
--- a/13_integrated_testing/Cargo.lock
+++ b/13_integrated_testing/Cargo.lock
@@ -2,9 +2,9 @@
 # It is not intended for manual editing.
 [[package]]
 name = "cortex-a"
-version = "5.1.1"
+version = "5.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7c9b7504606c9e83a6b35e6f99db890084baf13fbbed67603fcc2a62b2cfe62b"
+checksum = "d33a61602f83c3fff3e092967ad4d5d820a9fea7bc418e119616872085fe731d"
 dependencies = [
  "register",
 ]
@@ -55,9 +55,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.56"
+version = "1.0.59"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a9802ddde94170d186eeee5005b798d9c159fa970403f1be19976d0cfb939b72"
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 dependencies = [
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  "quote",
diff --git a/14_exceptions_part2_peripheral_IRQs/Cargo.lock b/14_exceptions_part2_peripheral_IRQs/Cargo.lock
index d4776fc2..b5c77499 100644
--- a/14_exceptions_part2_peripheral_IRQs/Cargo.lock
+++ b/14_exceptions_part2_peripheral_IRQs/Cargo.lock
@@ -2,9 +2,9 @@
 # It is not intended for manual editing.
 [[package]]
 name = "cortex-a"
-version = "5.1.1"
+version = "5.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7c9b7504606c9e83a6b35e6f99db890084baf13fbbed67603fcc2a62b2cfe62b"
+checksum = "d33a61602f83c3fff3e092967ad4d5d820a9fea7bc418e119616872085fe731d"
 dependencies = [
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 ]
@@ -55,9 +55,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.56"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a9802ddde94170d186eeee5005b798d9c159fa970403f1be19976d0cfb939b72"
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 dependencies = [
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diff --git a/15_virtual_mem_part2_mmio_remap/Cargo.lock b/15_virtual_mem_part2_mmio_remap/Cargo.lock
index d4776fc2..b5c77499 100644
--- a/15_virtual_mem_part2_mmio_remap/Cargo.lock
+++ b/15_virtual_mem_part2_mmio_remap/Cargo.lock
@@ -2,9 +2,9 @@
 # It is not intended for manual editing.
 [[package]]
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-version = "5.1.1"
+version = "5.1.2"
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-checksum = "7c9b7504606c9e83a6b35e6f99db890084baf13fbbed67603fcc2a62b2cfe62b"
+checksum = "d33a61602f83c3fff3e092967ad4d5d820a9fea7bc418e119616872085fe731d"
 dependencies = [
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 ]
@@ -55,9 +55,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
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 dependencies = [
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