diff --git a/.travis.yml b/.travis.yml
index 88b368f..b020798 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,3 +1,5 @@
+language: minimal
+
 services:
   - docker
 
diff --git a/Dockerfile b/Dockerfile
index a8f9a81..f3d133c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -30,8 +30,7 @@ RUN apt-get update && \
     echo "deb http://overviewer.org/debian ./" >> /etc/apt/sources.list && \
     wget -O - https://overviewer.org/debian/overviewer.gpg.asc | apt-key add - && \
     apt-get update && \
-    apt-get install -y minecraft-overviewer && \
-    apt-get clean && \
+    apt-get install -y --no-install-recommends minecraft-overviewer && \
     rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* && \
     useradd -m minecraft && \
     mkdir -p /home/minecraft/render /home/minecraft/server
diff --git a/entrypoint.sh b/entrypoint.sh
index 28a254f..e51524a 100644
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -10,14 +10,16 @@ fi
 # Download Minecraft client .jar (Contains textures used by Minecraft Overviewer)
 CLIENT_URL=$(python3 /home/minecraft/download_url.py "$MINECRAFT_VERSION")
 echo "Using Client URL $CLIENT_URL."
-wget -N "${CLIENT_URL}" -O "${MINECRAFT_VERSION}.jar" -P /home/minecraft/.minecraft/versions/${MINECRAFT_VERSION}/
+wget -N "${CLIENT_URL}" -O "${MINECRAFT_VERSION}.jar" -P "/home/minecraft/.minecraft/versions/${MINECRAFT_VERSION}/"
 
 # Render the Map
 if [ "$RENDER_MAP" == "true" ]; then
+  # shellcheck disable=SC2086
   overviewer.py --config "$CONFIG_LOCATION" $ADDITIONAL_ARGS
 fi
 
 # Render the POI
 if [ "$RENDER_POI" == "true" ]; then
+  # shellcheck disable=SC2086
   overviewer.py --config "$CONFIG_LOCATION" --genpoi $ADDITIONAL_ARGS_POI
 fi