diff --git a/util/crossgcc/buildgcc b/util/crossgcc/buildgcc
index 53f9782cb5..bbe74eb2b8 100755
--- a/util/crossgcc/buildgcc
+++ b/util/crossgcc/buildgcc
@@ -18,8 +18,8 @@
 
 cd $(dirname $0)
 
-CROSSGCC_DATE="October 15th, 2017"
-CROSSGCC_VERSION="1.50"
+CROSSGCC_DATE="June 3rd, 2018"
+CROSSGCC_VERSION="1.51"
 CROSSGCC_COMMIT=$( git describe )
 
 # default settings
@@ -42,7 +42,7 @@ GCC_VERSION=6.3.0
 GCC_AUTOCONF_VERSION=2.69
 BINUTILS_VERSION=2.29.1
 GDB_VERSION=8.0
-IASL_VERSION=20161222
+IASL_VERSION=20180531
 PYTHON_VERSION=3.5.1
 EXPAT_VERSION=2.2.1
 # CLANG version number
diff --git a/util/crossgcc/patches/acpica-unix2-20161222_iasl.patch b/util/crossgcc/patches/acpica-unix2-20161222_iasl.patch
deleted file mode 100644
index 24bde98a32..0000000000
--- a/util/crossgcc/patches/acpica-unix2-20161222_iasl.patch
+++ /dev/null
@@ -1,27 +0,0 @@
-diff -Naur acpica-unix2-20161222/source/compiler/asloptions.c acpica-unix2-20161222/source/compiler/asloptions.c
---- acpica-unix2-20161222/source/compiler/asloptions.c
-+++ acpica-unix2-20161222/source/compiler/asloptions.c
-@@ -100,6 +100,7 @@
-     if (argc < 2)
-     {
-         printf (ACPI_COMMON_SIGNON (ASL_COMPILER_NAME));
-+        printf ("%s\n", COREBOOT_TOOLCHAIN_VERSION);
-         Usage ();
-         exit (1);
-     }
-@@ -130,6 +131,7 @@
-     if (Gbl_DoSignon)
-     {
-         printf (ACPI_COMMON_SIGNON (ASL_COMPILER_NAME));
-+        printf ("%s\n", COREBOOT_TOOLCHAIN_VERSION);
-         if (Gbl_IgnoreErrors)
-         {
-             printf ("Ignoring all errors, forcing AML file generation\n\n");
-@@ -711,6 +713,7 @@
-         case '^':
-
-             printf (ACPI_COMMON_SIGNON (ASL_COMPILER_NAME));
-+            printf ("%s\n", COREBOOT_TOOLCHAIN_VERSION);
-             exit (0);
-
-         case 'a':
diff --git a/util/crossgcc/patches/acpica-unix2-20180531_iasl.patch b/util/crossgcc/patches/acpica-unix2-20180531_iasl.patch
new file mode 100644
index 0000000000..fea5cd3c47
--- /dev/null
+++ b/util/crossgcc/patches/acpica-unix2-20180531_iasl.patch
@@ -0,0 +1,27 @@
+diff -Naur acpica-unix2-20180531_/source/compiler/asloptions.c acpica-unix2-20180531/source/compiler/asloptions.c > acpica-unix2-20180531_iasl.patch
+--- acpica-unix2-20180531_/source/compiler/asloptions.c
++++ acpica-unix2-20180531/source/compiler/asloptions.c
+@@ -126,6 +126,7 @@
+     if (Gbl_DoSignon)
+     {
+         printf (ACPI_COMMON_SIGNON (ASL_COMPILER_NAME));
++        printf ("%s\n", COREBOOT_TOOLCHAIN_VERSION);
+         if (Gbl_IgnoreErrors)
+         {
+             printf ("Ignoring all errors, forcing AML file generation\n\n");
+@@ -753,6 +754,7 @@
+         case '^':
+
+             printf (ACPI_COMMON_SIGNON (ASL_COMPILER_NAME));
++            printf ("%s\n", COREBOOT_TOOLCHAIN_VERSION);
+             exit (0);
+
+         case 'a':
+@@ -766,6 +768,7 @@
+
+             printf (ACPI_COMMON_SIGNON (ASL_COMPILER_NAME));
+             printf (ACPI_COMMON_BUILD_TIME);
++            printf ("%s\n", COREBOOT_TOOLCHAIN_VERSION);
+             exit (0);
+
+         case 'e':
diff --git a/util/crossgcc/sum/acpica-unix2-20161222.tar.gz.cksum b/util/crossgcc/sum/acpica-unix2-20161222.tar.gz.cksum
deleted file mode 100644
index d857678871..0000000000
--- a/util/crossgcc/sum/acpica-unix2-20161222.tar.gz.cksum
+++ /dev/null
@@ -1 +0,0 @@
-73e57d4d558c9bc831165c71adbff577b526f256  tarballs/acpica-unix2-20161222.tar.gz
diff --git a/util/crossgcc/sum/acpica-unix2-20180531.tar.gz.cksum b/util/crossgcc/sum/acpica-unix2-20180531.tar.gz.cksum
new file mode 100644
index 0000000000..700185839a
--- /dev/null
+++ b/util/crossgcc/sum/acpica-unix2-20180531.tar.gz.cksum
@@ -0,0 +1 @@
+17717140438d506533b4a56e34350749d7b84d6c  tarballs/acpica-unix2-20180531.tar.gz