diff --git a/src/main.ts b/src/main.ts
index 2e7efec6..c9c631a0 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -4,12 +4,37 @@ import * as os from 'os'
 import * as path from 'path'
 import * as tc from '@actions/tool-cache'
 
-let csVersion = core.getInput('version')
-if (!csVersion) csVersion = '2.1.4'
 const scalaCLIVersion = '1.0.6'
 
+const architecture_x86_64 = 'x86_64'
+const architecture_aarch64 = 'aarch64'
+
+const architecture = getArchitecture()
+
+const csDefaultVersion_x86_64 = '2.1.7'
+const csDefaultVersion_aarch64 = '2.1.7'
+
+const csVersion =
+  core.getInput('version') ||
+  (architecture === architecture_x86_64 ? csDefaultVersion_x86_64 : csDefaultVersion_aarch64)
+
 const coursierVersionSpec = csVersion
 
+const coursierBinariesGithubRepository =
+  architecture === architecture_x86_64
+    ? 'https://github.com/coursier/coursier/'
+    : 'https://github.com/VirtusLab/coursier-m1/'
+
+function getArchitecture(): string {
+  if (process.arch === 'x64') {
+    return architecture_x86_64
+  } else if (process.arch === 'arm' || process.arch === 'arm64') {
+    return architecture_aarch64
+  } else {
+    throw new Error(`Coursier does not have support for the ${process.arch} architecture`)
+  }
+}
+
 async function execOutput(cmd: string, ...args: string[]): Promise<string> {
   let output = ''
   const options = {
@@ -24,7 +49,7 @@ async function execOutput(cmd: string, ...args: string[]): Promise<string> {
 }
 
 async function downloadCoursier(): Promise<string> {
-  const baseUrl = `https://github.com/coursier/coursier/releases/download/v${csVersion}/cs-x86_64`
+  const baseUrl = `${coursierBinariesGithubRepository}/releases/download/v${csVersion}/cs-${architecture}`
   let csBinary = ''
   switch (process.platform) {
     case 'linux': {