diff --git a/wwwroot/lib/semantic/package.json b/wwwroot/lib/semantic/package.json
index dad7ba1..04470db 100644
--- a/wwwroot/lib/semantic/package.json
+++ b/wwwroot/lib/semantic/package.json
@@ -53,7 +53,7 @@
     "del": "^2.2.0",
     "extend": "^3.0.0",
     "gulp": "^3.9.1",
-    "gulp-autoprefixer": "^3.1.0",
+    "gulp-autoprefixer": "^6.0.0",
     "gulp-chmod": "^1.3.0",
     "gulp-clone": "^1.0.0",
     "gulp-concat": "^2.6.0",