diff --git a/internal/crosscompile/crosscompile.go b/internal/crosscompile/crosscompile.go
index fbd8962a..8c0bf788 100644
--- a/internal/crosscompile/crosscompile.go
+++ b/internal/crosscompile/crosscompile.go
@@ -48,8 +48,8 @@ var (
 )
 
 var (
-	espClangBaseUrl = "https://github.com/goplus/espressif-llvm-project-prebuilt/releases/download/19.1.2_20250820"
-	espClangVersion = "19.1.2_20250820"
+	espClangBaseUrl = "https://github.com/goplus/espressif-llvm-project-prebuilt/releases/download/19.1.2_20250905-3"
+	espClangVersion = "19.1.2_20250905-3"
 )
 
 // cacheRoot can be overridden for testing
diff --git a/internal/crosscompile/fetch_test.go b/internal/crosscompile/fetch_test.go
index d5e4bc57..9be771dd 100644
--- a/internal/crosscompile/fetch_test.go
+++ b/internal/crosscompile/fetch_test.go
@@ -605,7 +605,7 @@ func TestESPClangDownloadWhenNotExists(t *testing.T) {
 	}
 
 	server := createTestServer(t, map[string]string{
-		"clang-esp-19.1.2_20250820-linux.tar.xz": string(archiveContent),
+		fmt.Sprintf("clang-esp-%s-linux.tar.xz", espClangVersion): string(archiveContent),
 	})
 	defer server.Close()