diff --git a/Dockerfile b/Dockerfile
index fa525e0..540653f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -19,7 +19,6 @@ RUN apt-get update && apt-get install -y \
     libc6-dev \
     libx11-dev \
     subversion \
-    libx11-dev \
     libxrandr-dev \
     libxcursor-dev \
     libxxf86vm-dev \