diff --git a/lib/setup-julia.js b/lib/setup-julia.js
index 98680e7..5537082 100644
--- a/lib/setup-julia.js
+++ b/lib/setup-julia.js
@@ -27,7 +27,8 @@ const archSynonyms = {
     'x64': 'x64',
     'X64': 'x64',
     'aarch64': 'aarch64',
-    'ARM64': 'aarch64'
+    'ARM64': 'aarch64',
+    'arm64': 'aarch64'
 };
 function run() {
     return __awaiter(this, void 0, void 0, function* () {
diff --git a/package-lock.json b/package-lock.json
index 41e90ee..8799e2a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -6,7 +6,7 @@
   "packages": {
     "": {
       "name": "setup-julia",
-      "version": "1.8.3",
+      "version": "1.9.0",
       "license": "MIT",
       "dependencies": {
         "@actions/core": "^1.10.0",
diff --git a/src/setup-julia.ts b/src/setup-julia.ts
index e91bd0e..239d683 100644
--- a/src/setup-julia.ts
+++ b/src/setup-julia.ts
@@ -14,7 +14,8 @@ const archSynonyms = {
     'x64': 'x64',
     'X64': 'x64',
     'aarch64': 'aarch64',
-    'ARM64': 'aarch64'
+    'ARM64': 'aarch64',
+    'arm64': 'aarch64'
 }
 
 async function run() {