diff --git a/Dockerfile b/Dockerfile
index b65f3a4..fa525e0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -14,12 +14,12 @@ RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
 RUN apt-get update && apt-get install -y \
     build-essential \
     gcc \
-	git \
-	cmake \
+    git \
+    cmake \
     libc6-dev \
     libx11-dev \
-	subversion \
-	libx11-dev \
+    subversion \
+    libx11-dev \
     libxrandr-dev \
     libxcursor-dev \
     libxxf86vm-dev \