diff --git a/src/rules.mk b/src/rules.mk
index e4466ca..b98f4cf 100644
--- a/src/rules.mk
+++ b/src/rules.mk
@@ -129,7 +129,7 @@ endif
 # Used libraries
 
 LDLIBS     += -l$(LIBNAME)
-LDLIBS     += -Wl,--start-group -lc -lgcc -lnosys -Wl,--end-group
+LDLIBS     += -Wl,--start-group -lc -lgcc -Wl,--end-group
 
 ####################################################################
 ####################################################################
diff --git a/util/install-toolchain.sh b/util/install-toolchain.sh
index 7b5a9c6..fe4fd94 100755
--- a/util/install-toolchain.sh
+++ b/util/install-toolchain.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 set -eo pipefail
-URL=https://developer.arm.com/-/media/Files/downloads/gnu/12.2.rel1/binrel/arm-gnu-toolchain-12.2.rel1-x86_64-arm-none-eabi.tar.xz
-TOOLCHAIN=arm-gnu-toolchain-12.2.rel1-x86_64-arm-none-eabi
+URL=https://developer.arm.com/-/media/Files/downloads/gnu/13.3.rel1/binrel/arm-gnu-toolchain-13.3.rel1-x86_64-arm-none-eabi.tar.xz
+TOOLCHAIN=arm-gnu-toolchain-13.3.rel1-x86_64-arm-none-eabi
 TOOLCHAINS=$HOME/toolchains
 TOOLCHAIN_MISSING=0
 GCC=${TOOLCHAINS}/gcc-arm-embedded/bin/arm-none-eabi-gcc