diff --git a/Dockerfile b/Dockerfile
index 698cea6..afe0a5c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,3 +1,3 @@
 FROM alpine:3.11.5
-RUN apk add --no-cache nodejs npm git imagemagick make python3 python2 alpine-sdk && npm i -g node-gyp && git clone https://gitdab.com/Codinget/Snek /snek && cd /snek && npm i --unsafe-perm && apk del git make imagemagick python2 python3 alpine-sdk && printf '#!/bin/sh\ncd /snek\nnpm start\n' > start.sh && chmod +x start.sh
+RUN apk add --no-cache nodejs npm git imagemagick make python3 python2 alpine-sdk bc && npm i -g node-gyp && git clone https://gitdab.com/Codinget/Snek /snek && cd /snek && npm i --unsafe-perm && make clean && apk del bc git make imagemagick python2 python3 alpine-sdk && printf '#!/bin/sh\ncd /snek\nnpm start\n' > start.sh && chmod +x start.sh
 CMD /snek/start.sh
diff --git a/Makefile b/Makefile
index 189541f..36f767c 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-.PHONY: all clean
+.PHONY: all clean mrproper
 
 SIZE = 32
 TEMPSIZE = $(shell echo $(SIZE) '*4' | bc)
@@ -92,4 +92,5 @@ public/js/snek.js: $(wildcard src/js/*.js)
 
 clean:
 	rm -f build/*.*
+mrproper: clean
 	rm -f $(OUTPUT)