diff --git a/.vscode/launch.json b/.vscode/launch.json
index 4b8b3cc7..a50270d2 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -52,7 +52,7 @@
             "servertype": "openocd",
             "runToMain": true,
             // Only use armToolchainPath if your arm-none-eabi-gdb is not in your path (some GCC packages does not contain arm-none-eabi-gdb)
-            "armToolchainPath": "${workspaceRoot}/../gcc-arm-11.2-2022.02-x86_64-arm-none-eabi/bin",
+            "armToolchainPath": "${workspaceRoot}/../gcc-arm-none-eabi-10.3-2021.10/bin",
             "svdFile": "${workspaceRoot}/nrf52.svd",
             "configFiles": [
                 "interface/stlink.cfg",
diff --git a/doc/MemoryAnalysis.md b/doc/MemoryAnalysis.md
index 9a6e81c9..846d5079 100644
--- a/doc/MemoryAnalysis.md
+++ b/doc/MemoryAnalysis.md
@@ -51,9 +51,9 @@ Puncover is really easy to install:
     - `python -m virtualenv venv` 
     - `source venv/bin/activate`
  - Install : `pip install .`
- - Run : `puncover --gcc_tools_base=/path/to/gcc-arm-11.2-2022.02-x86_64-arm-none-eabi/bin/arm-none-eabi- --elf_file /path/to/build/directory/src/pinetime-app-1.1.0.out --src_root /path/to/sources --build_dir /path/to/build/directory`
+ - Run : `puncover --gcc_tools_base=/path/to/gcc-arm-none-eabi-10.3-2021.10/bin/arm-none-eabi- --elf_file /path/to/build/directory/src/pinetime-app-1.1.0.out --src_root /path/to/sources --build_dir /path/to/build/directory`
      - Replace
-         * `/path/to/gcc-arm-11.2-2022.02-x86_64-arm-none-eabi/bin` with the path to your gcc-arm-none-eabi toolchain
+         * `/path/to/gcc-arm-none-eabi-10.3-2021.10/bin` with the path to your gcc-arm-none-eabi toolchain
          * `/path/to/build/directory/src/pinetime-app-1.1.0.out` with the path to the binary generated by GCC (.out file)
          * `/path/to/sources` with the path to the root folder of the sources (checkout directory)
         * `/path/to/build/directory` with the path to the build directory
diff --git a/doc/buildAndProgram.md b/doc/buildAndProgram.md
index 42d6d390..a1961ee4 100644
--- a/doc/buildAndProgram.md
+++ b/doc/buildAndProgram.md
@@ -1,7 +1,7 @@
 # Build
 ## Dependencies
 To build this project, you'll need:
- - A cross-compiler : [ARM-GCC (arm-none-eabi 11.2-2022.02)](https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/downloads)
+ - A cross-compiler : [ARM-GCC (10.3-2021.10)](https://developer.arm.com/downloads/-/gnu-rm)
  - The NRF52 SDK 15.3.0 : [nRF-SDK v15.3.0](https://developer.nordicsemi.com/nRF5_SDK/nRF5_SDK_v15.x.x/nRF5_SDK_15.3.0_59ac345.zip)
  - The Python 3 modules `cbor`, `intelhex`, `click` and `cryptography` modules for the `mcuboot` tool (see [requirements.txt](../tools/mcuboot/requirements.txt))
    - To keep the system clean, you can install python modules into a python virtual environment (`venv`)
@@ -31,7 +31,7 @@ CMake configures the project according to variables you specify the command line
 
  Variable | Description | Example|
 ----------|-------------|--------|
-**ARM_NONE_EABI_TOOLCHAIN_PATH**|path to the toolchain directory|`-DARM_NONE_EABI_TOOLCHAIN_PATH=/home/jf/nrf52/gcc-arm-11.2-2022.02-x86_64-arm-none-eabi/`|
+**ARM_NONE_EABI_TOOLCHAIN_PATH**|path to the toolchain directory|`-DARM_NONE_EABI_TOOLCHAIN_PATH=/home/jf/nrf52/gcc-arm-none-eabi-10.3-2021.10/`|
 **NRF5_SDK_PATH**|path to the NRF52 SDK|`-DNRF5_SDK_PATH=/home/jf/nrf52/Pinetime/sdk`|
 **USE_JLINK, USE_GDB_CLIENT and USE_OPENOCD**|Enable *JLink* mode, *GDB Client* (Black Magic Probe) mode or *OpenOCD* mode (set the one you want to use to `1`)|`-DUSE_JLINK=1`
 **CMAKE_BUILD_TYPE (\*)**| Build type (Release or Debug). Release is applied by default if this variable is not specified.|`-DCMAKE_BUILD_TYPE=Debug`
diff --git a/doc/buildWithVScode.md b/doc/buildWithVScode.md
index c2dcde3c..48b8923f 100644
--- a/doc/buildWithVScode.md
+++ b/doc/buildWithVScode.md
@@ -8,7 +8,7 @@ To support as many setups as possible the VS Code configuration files expect the
 
  Variable | Description | Example
 ----------|-------------|--------
-**ARM_NONE_EABI_TOOLCHAIN_PATH**|path to the toolchain directory|`export ARM_NONE_EABI_TOOLCHAIN_PATH=/opt/gcc-arm-11.2-2022.02-x86_64-arm-none-eabi`
+**ARM_NONE_EABI_TOOLCHAIN_PATH**|path to the toolchain directory|`export ARM_NONE_EABI_TOOLCHAIN_PATH=/opt/gcc-arm-none-eabi-10.3-2021.10`
 **NRF5_SDK_PATH**|path to the NRF52 SDK|`export NRF5_SDK_PATH=/opt/nRF5_SDK_15.3.0_59ac345`
 
 ## VS Code Extensions
diff --git a/docker/build.sh b/docker/build.sh
index 6137bbb8..663390c4 100755
--- a/docker/build.sh
+++ b/docker/build.sh
@@ -12,13 +12,13 @@ export BUILD_DIR="${BUILD_DIR:=$SOURCES_DIR/build}"
 export OUTPUT_DIR="${OUTPUT_DIR:=$SOURCES_DIR/build/output}"
 
 export BUILD_TYPE=${BUILD_TYPE:=Release}
-export GCC_ARM_VER=${GCC_ARM_VER:="11.2-2022.02"}
+export GCC_ARM_VER=${GCC_ARM_VER:="10.3-2021.10"}
 export NRF_SDK_VER=${NRF_SDK_VER:="nRF5_SDK_15.3.0_59ac345"}
 
 MACHINE="$(uname -m)"
 [[ "$MACHINE" == "arm64" ]] && MACHINE="aarch64"
 
-export GCC_ARM_PATH="gcc-arm-$GCC_ARM_VER-$MACHINE-arm-none-eabi"
+export GCC_ARM_PATH="gcc-arm-none-eabi-$GCC_ARM_VER"
 
 main() {
   local target="$1"
@@ -40,7 +40,7 @@ main() {
 }
 
 GetGcc() {
-  wget -q https://developer.arm.com/-/media/Files/downloads/gnu/$GCC_ARM_VER/binrel/$GCC_ARM_PATH.tar.xz -O - | tar -xJ -C $TOOLS_DIR/
+  wget -q https://developer.arm.com/-/media/Files/downloads/gnu-rm/$GCC_ARM_VER/$GCC_ARM_PATH-$MACHINE-linux.tar.bz2 -O - | tar -xj -C $TOOLS_DIR/
 }
 
 GetMcuBoot() {