diff --git a/eng/common/dotnet-install.sh b/eng/common/dotnet-install.sh
index d6efeb44..06f56eeb 100755
--- a/eng/common/dotnet-install.sh
+++ b/eng/common/dotnet-install.sh
@@ -52,7 +52,7 @@ done
 # Use uname to determine what the CPU is, see https://en.wikipedia.org/wiki/Uname#Examples
 cpuname=$(uname -m)
 case $cpuname in
-  aarch64)
+  aarch64|arm64)
     buildarch=arm64
     ;;
   amd64|x86_64)
diff --git a/global.json b/global.json
index 71f1b11c..6be781e0 100644
--- a/global.json
+++ b/global.json
@@ -1,12 +1,12 @@
 {
   "tools": {
-    "dotnet": "6.0.100-preview.3.21202.5",
+    "dotnet": "6.0.100-preview.4.21253.7",
     "runtimes": {
       "dotnet": [
-        "3.1.14"
+        "6.0.0-preview.4.21253.7"
       ],
       "aspnetcore": [
-        "3.1.14"
+        "6.0.0-preview.4.21253.5"
       ]
     }
   },