diff --git a/README.md b/README.md
index ba8d8c4..f436163 100644
--- a/README.md
+++ b/README.md
@@ -38,7 +38,11 @@ This action sets up a Julia environment for use in actions by downloading a spec
 
     # The architecture of the Julia binaries.
     #
-    # Supported values: x64 | x86
+    # Please note that installing aarch64 binaries only makes sense on self-hosted aarch64 runners.
+    # We currently don't run test builds on that architecture, so we cannot guarantee that the input won't break randomly,
+    # although there is no reason why it would.
+    #
+    # Supported values: x64 | x86 | aarch64 (untested)
     #
     # Default: x64
     arch: ''
diff --git a/lib/installer.js b/lib/installer.js
index 8034a17..e97e625 100644
--- a/lib/installer.js
+++ b/lib/installer.js
@@ -32,7 +32,8 @@ const osMap = {
 };
 const archMap = {
     'x86': 'i686',
-    'x64': 'x86_64'
+    'x64': 'x86_64',
+    'aarch64': 'aarch64'
 };
 // Store information about the environment
 const osPlat = os.platform(); // possible values: win32 (Windows), linux (Linux), darwin (macOS)
diff --git a/package-lock.json b/package-lock.json
index 6cc2cd8..26147bf 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5,6 +5,7 @@
   "requires": true,
   "packages": {
     "": {
+      "name": "setup-julia",
       "version": "1.6.1",
       "license": "MIT",
       "dependencies": {
diff --git a/src/installer.ts b/src/installer.ts
index 77ec49b..8a1e94b 100644
--- a/src/installer.ts
+++ b/src/installer.ts
@@ -18,7 +18,8 @@ const osMap = {
 }
 const archMap = {
     'x86': 'i686',
-    'x64': 'x86_64'
+    'x64': 'x86_64',
+    'aarch64': 'aarch64'
 }
 
 // Store information about the environment