diff --git a/dist/index.js b/dist/index.js
index f7756f3..365b165 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -64,7 +64,7 @@ function run() {
             if (emArgs.version !== "latest" && emArgs.version !== "tot" && emArgs.noCache === "false" && !emArgs.actionsCacheFolder) {
                 emsdkFolder = yield tc.find('emsdk', emArgs.version, os.arch());
             }
-            const cacheKey = `${emArgs.version}-${os.arch()}-master`;
+            const cacheKey = `${emArgs.version}-${os.platform()}-${os.arch()}-master`;
             if (emArgs.actionsCacheFolder && process.env.GITHUB_WORKSPACE) {
                 const fullCachePath = path.join(process.env.GITHUB_WORKSPACE, emArgs.actionsCacheFolder);
                 try {
diff --git a/src/main.ts b/src/main.ts
index 35f06f9..29083c4 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -26,7 +26,7 @@ async function run() {
       emsdkFolder = await tc.find('emsdk', emArgs.version, os.arch());
     }
 
-    const cacheKey = `${emArgs.version}-${os.arch()}-master`;
+    const cacheKey = `${emArgs.version}-${ os.platform() }-${os.arch()}-master`;
     if (emArgs.actionsCacheFolder && process.env.GITHUB_WORKSPACE) {
       const fullCachePath = path.join(process.env.GITHUB_WORKSPACE, emArgs.actionsCacheFolder);
       try {