diff --git a/Dockerfile b/Dockerfile
index a859cc3..7f89fea 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -24,20 +24,22 @@ RUN apt-get install -y docker-ce-cli
 COPY --chown=jenkins:jenkins executors.groovy /usr/share/jenkins/ref/init.groovy.d/executors.groovy
 
 # Install flutter
-RUN apt update
-RUN apt install -y curl git wget unzip libgconf-2-4 gdb libstdc++6 libglu1-mesa fonts-droid-fallback lib32stdc++6 python3 sed
-RUN apt clean
+RUN apt-get update
+RUN apt-get install -y\
+      curl git wget \
+      unzip libgconf-2-4 gdb \
+      libstdc++6 libglu1-mesa fonts-droid-fallback \
+      lib32stdc++6 python3 sed
 
 RUN git clone https://github.com/flutter/flutter.git /usr/local/flutter
 RUN git config --global --add safe.directory /usr/local/flutter
 
 ENV PATH="/usr/local/flutter/bin:/usr/local/flutter/bin/cache/dart-sdk/bin:${PATH}"
 
-# Install jenkins plugins
-USER jenkins
-RUN jenkins-plugin-cli --plugins "blueocean docker-workflow"
-
-# Run flutter upgrade
 RUN flutter doctor -v
 RUN flutter channel master
-RUN flutter upgrade
\ No newline at end of file
+RUN flutter upgrade
+
+# Install jenkins plugins
+USER jenkins
+RUN jenkins-plugin-cli --plugins "blueocean docker-workflow"
\ No newline at end of file