diff --git a/HMCL/build.gradle b/HMCL/build.gradle
index 0fdd14dfa..e1711cac6 100644
--- a/HMCL/build.gradle
+++ b/HMCL/build.gradle
@@ -28,7 +28,7 @@ import org.tukaani.xz.LZMA2Options
 import org.tukaani.xz.XZOutputStream
 
 def dev = ""
-def shortcommit = System.getenv("GITHUB_SHA").toUpperCase().substring(0, 7)
+def shortcommit = System.getenv("GITHUB_SHA").toLowerCase().substring(0, 7)
 if (!shortcommit.isEmpty()) dev = "dev-" + shortcommit
 def buildnumber = System.getenv("BUILD_NUMBER") ?: dev ?: "SNAPSHOT"
 if (System.getenv("BUILD_NUMBER") != null && System.getenv("BUILD_NUMBER_OFFSET") != null)