diff --git a/README.adoc b/README.adoc
index 0257410..1a7f4e5 100644
--- a/README.adoc
+++ b/README.adoc
@@ -1,5 +1,5 @@
 = Linux Kernel Module Cheat
-:description: The perfect emulation setup to study and develop the <<linux-kernel>> v5.2.1, kernel modules, <<qemu-buildroot-setup,QEMU>>, <<gem5-buildroot-setup,gem5>> and x86_64, ARMv7 and ARMv8 <<userland-assembly,userland>> and <<baremetal-setup,baremetal>> assembly, <<c,ANSI C>>, <<cpp,C++>> and <<posix,POSIX>>. <<gdb>> and <<kgdb>> just work. Powered by <<about-the-qemu-buildroot-setup,Buildroot>> and <<about-the-baremetal-setup,crosstool-NG>>. Highly automated. Thoroughly documented. Automated <<test-this-repo,tests>>. "Tested" in an Ubuntu 18.04 host.
+:description: The perfect emulation setup to study and develop the <<linux-kernel>> v5.4.3, kernel modules, <<qemu-buildroot-setup,QEMU>>, <<gem5-buildroot-setup,gem5>> and x86_64, ARMv7 and ARMv8 <<userland-assembly,userland>> and <<baremetal-setup,baremetal>> assembly, <<c,ANSI C>>, <<cpp,C++>> and <<posix,POSIX>>. <<gdb>> and <<kgdb>> just work. Powered by <<about-the-qemu-buildroot-setup,Buildroot>> and <<about-the-baremetal-setup,crosstool-NG>>. Highly automated. Thoroughly documented. Automated <<test-this-repo,tests>>. "Tested" in an Ubuntu 19.10 host.
 :idprefix:
 :idseparator: -
 :nofooter:
diff --git a/buildroot_config/default b/buildroot_config/default
index 1876ce3..f7ed97b 100644
--- a/buildroot_config/default
+++ b/buildroot_config/default
@@ -1,3 +1,7 @@
+# Versions of our submodules.
+BR2_BINUTILS_VERSION_2_32_X=y
+BR2_GCC_VERSION_9_X=y
+
 # Toolchain options.
 # Enable as much visibility as possible.
 BR2_CCACHE=y
diff --git a/submodules/binutils-gdb b/submodules/binutils-gdb
index 1690de7..f7ec391 160000
--- a/submodules/binutils-gdb
+++ b/submodules/binutils-gdb
@@ -1 +1 @@
-Subproject commit 1690de78a3603a3a0ab8487ef896e75871bb0737
+Subproject commit f7ec391a897c960527f6f04a0684f06cadd13936
diff --git a/submodules/buildroot b/submodules/buildroot
index 653eaa1..157ac49 160000
--- a/submodules/buildroot
+++ b/submodules/buildroot
@@ -1 +1 @@
-Subproject commit 653eaa178bf7352791d988a8ee9db79c8bd7975e
+Subproject commit 157ac499cf7ae454ecc6942f97519e67d644ac0b
diff --git a/submodules/gcc b/submodules/gcc
index 9046071..8a6560d 160000
--- a/submodules/gcc
+++ b/submodules/gcc
@@ -1 +1 @@
-Subproject commit 9046071dddb0a9ee7e30e5edf27cfc53b5b9c238
+Subproject commit 8a6560d41c35f9003e0d2b592ebb28a56d1b8186
diff --git a/submodules/glibc b/submodules/glibc
index 6c99e37..be9a328 160000
--- a/submodules/glibc
+++ b/submodules/glibc
@@ -1 +1 @@
-Subproject commit 6c99e37f6fb640a50a3113b2dbee5d5389843c1e
+Subproject commit be9a328c93834648e0bec106a1f86357d1a8c7e1
diff --git a/submodules/linux b/submodules/linux
index 527a3db..f7688b4 160000
--- a/submodules/linux
+++ b/submodules/linux
@@ -1 +1 @@
-Subproject commit 527a3db363a3bd7e6ae0a77da809e01847a9931c
+Subproject commit f7688b48ac46e9a669e279f1bc167722d5141eda
diff --git a/submodules/qemu b/submodules/qemu
index d8dae26..a1dfb1b 160000
--- a/submodules/qemu
+++ b/submodules/qemu
@@ -1 +1 @@
-Subproject commit d8dae268c0a3e4e361002aca3b382fedd77f2567
+Subproject commit a1dfb1b86cec681b0227d85dfd9f8bb9322bc234