diff --git a/docker/syntax_check.sh b/docker/syntax_check.sh
index 0bd3466a..47fb095a 100755
--- a/docker/syntax_check.sh
+++ b/docker/syntax_check.sh
@@ -6,7 +6,7 @@ CLANG_FORMAT_BIN="/usr/bin/clang-format-12"
 
 PROJECT_DIR=$(pwd)
 
-cd $PROJECT_DIR
+cd "$PROJECT_DIR" || exit 
 
 echo "RUN C\C++ SYNTAX CHECK"
 C_FILES=$(find . \
@@ -34,7 +34,7 @@ fi
 
 read -p "Do you want fix syntax? (y/n): " confirm && [[ $confirm == [yY] || $confirm == [yY][eE][sS] ]] || exit 1
 
-cd $PROJECT_DIR
+cd "$PROJECT_DIR" || exit 
 
 # We use root in container and clang-format rewriting files. We'll need change owner to original
 local_user=$(stat -c '%u' .clang-format)
diff --git a/scripts/flash_core1_main_swd.sh b/scripts/flash_core1_main_swd.sh
index 9e54e6e9..8a159df9 100755
--- a/scripts/flash_core1_main_swd.sh
+++ b/scripts/flash_core1_main_swd.sh
@@ -5,8 +5,8 @@ set -x -e
 SCRIPT_DIR="$( cd -- "$(dirname "$0")" >/dev/null 2>&1 ; pwd -P )"
 PROJECT_DIR="$(dirname "$SCRIPT_DIR")"
 
-rm $PROJECT_DIR/bootloader/.obj/f*/flash || true
-make -C $PROJECT_DIR/bootloader -j9 flash
+rm "$PROJECT_DIR"/bootloader/.obj/f*/flash || true
+make -C "$PROJECT_DIR"/bootloader -j9 flash
 
-rm $PROJECT_DIR/firmware/.obj/f*/flash || true
-make -C $PROJECT_DIR/firmware -j9 flash
+rm "$PROJECT_DIR"/firmware/.obj/f*/flash || true
+make -C "$PROJECT_DIR"/firmware -j9 flash
diff --git a/scripts/flash_core2_ble_swd.sh b/scripts/flash_core2_ble_swd.sh
index 1f04ba81..71ea713f 100755
--- a/scripts/flash_core2_ble_swd.sh
+++ b/scripts/flash_core2_ble_swd.sh
@@ -6,15 +6,15 @@ SCRIPT_DIR="$( cd -- "$(dirname "$0")" >/dev/null 2>&1 ; pwd -P )"
 PROJECT_DIR="$(dirname "$SCRIPT_DIR")"
 COPRO_DIR="$PROJECT_DIR/lib/STM32CubeWB/Projects/STM32WB_Copro_Wireless_Binaries/STM32WB5x"
 
-STM32_Programmer_CLI -c port=swd -fwupgrade $COPRO_DIR/stm32wb5x_FUS_fw_for_fus_0_5_3.bin 0x080EC000 || true
+STM32_Programmer_CLI -c port=swd -fwupgrade "$COPRO_DIR"/stm32wb5x_FUS_fw_for_fus_0_5_3.bin 0x080EC000 || true
 STM32_Programmer_CLI -c port=swd
 
-STM32_Programmer_CLI -c port=swd -fwupgrade $COPRO_DIR/stm32wb5x_FUS_fw.bin 0x080EC000 || true
+STM32_Programmer_CLI -c port=swd -fwupgrade "$COPRO_DIR"/stm32wb5x_FUS_fw.bin 0x080EC000 || true
 STM32_Programmer_CLI -c port=swd
 
 STM32_Programmer_CLI -c port=swd -fwdelete
 
-STM32_Programmer_CLI -c port=swd -fwupgrade $COPRO_DIR/stm32wb5x_BLE_Stack_full_fw.bin 0x080CA000 firstinstall=0
+STM32_Programmer_CLI -c port=swd -fwupgrade "$COPRO_DIR"/stm32wb5x_BLE_Stack_full_fw.bin 0x080CA000 firstinstall=0
 
 STM32_Programmer_CLI -c port=swd -ob nSWBOOT0=1 nBOOT0=1
 
diff --git a/scripts/flash_otp_version_dfu.sh b/scripts/flash_otp_version_dfu.sh
index 0a9526d4..014f8883 100755
--- a/scripts/flash_otp_version_dfu.sh
+++ b/scripts/flash_otp_version_dfu.sh
@@ -7,11 +7,11 @@ if [ "$#" -ne 1 ]; then
     exit
 fi
 
-if [ ! -f $1 ]; then
+if [ ! -f "$1" ]; then
     echo "Unable to open OTP file"
     exit
 fi
 
-STM32_Programmer_CLI -c port=usb1 -d $1 0x1FFF7000
+STM32_Programmer_CLI -c port=usb1 -d "$1" 0x1FFF7000
 
 STM32_Programmer_CLI -c port=usb1 -r8 0x1FFF7000 8
diff --git a/scripts/flash_otp_version_swd.sh b/scripts/flash_otp_version_swd.sh
index 1bfe1411..84e8dd71 100755
--- a/scripts/flash_otp_version_swd.sh
+++ b/scripts/flash_otp_version_swd.sh
@@ -7,11 +7,11 @@ if [ "$#" -ne 1 ]; then
     exit
 fi
 
-if [ ! -f $1 ]; then
+if [ ! -f "$1" ]; then
     echo "Unable to open OTP file"
     exit
 fi
 
-STM32_Programmer_CLI -c port=swd -d $1 0x1FFF7000
+STM32_Programmer_CLI -c port=swd -d "$1" 0x1FFF7000
 
 STM32_Programmer_CLI -c port=swd -r8 0x1FFF7000 8