diff --git a/lib/run.js b/lib/run.js
index 02c8447..d14e3fc 100644
--- a/lib/run.js
+++ b/lib/run.js
@@ -118,6 +118,9 @@ function run() {
         if (version.toLocaleLowerCase() === 'latest') {
             version = yield getStableHelmVersion();
         }
+        else if (!version.toLocaleLowerCase().startsWith('v')) {
+            version = 'v' + version;
+        }
         let cachedPath = yield downloadHelm(version);
         try {
             if (!process.env['PATH'].startsWith(path.dirname(cachedPath))) {
diff --git a/src/run.ts b/src/run.ts
index 5e93c02..77857cc 100644
--- a/src/run.ts
+++ b/src/run.ts
@@ -110,6 +110,8 @@ async function run() {
     let version = core.getInput('version', { 'required': true });
     if (version.toLocaleLowerCase() === 'latest') {
         version = await getStableHelmVersion();
+    }else if(!version.toLocaleLowerCase().startsWith('v')){
+        version = 'v' + version;
     }
 
     let cachedPath = await downloadHelm(version);