diff --git a/src/index.js b/src/index.js
index 3faf5fe..44c72aa 100644
--- a/src/index.js
+++ b/src/index.js
@@ -91,7 +91,7 @@ class ServerlessWebpackPrisma {
     const command =
       this.getPackageManager() === 'npm'
         ? `npm install ${params}${packageName}${version}`
-        : `yarn add ${params}${packageName}`;
+        : `yarn add ${params}${packageName}${version}`;
     childProcess.execSync(command, { cwd });
   }