diff --git a/platform.json b/platform.json
index 8e9aae0..d5b527e 100644
--- a/platform.json
+++ b/platform.json
@@ -13,7 +13,7 @@
     "type": "git",
     "url": "https://github.com/platformio/platform-ststm32.git"
   },
-  "version": "1.3.1-alpha1",
+  "version": "1.3.1",
   "packageRepositories": [
     "https://dl.bintray.com/platformio/dl-packages/manifest.json",
     "https://sourceforge.net/projects/platformio-storage/files/packages/manifest.json/download",