diff --git a/Dockerfile.v3x b/Dockerfile.v3x
index 274797c..d72042d 100644
--- a/Dockerfile.v3x
+++ b/Dockerfile.v3x
@@ -2,7 +2,7 @@ FROM alpine:3.5
 
 MAINTAINER Adrien Ferrand <ferrand.ad@gmail.com>
 
-ENV BACKUPPC_VERSION 3.3.2
+ENV BACKUPPC_VERSION 3.3.0
 ENV PAR2_VERSION v0.7.0
 
 RUN apk --no-cache add \
@@ -30,7 +30,7 @@ supervisor rsync samba-client iputils openssh openssl rrdtool msmtp lighttpd lig
 && touch /firstrun \
 # Clean
 && rm -rf /root/backuppc-xs /root/rsync-bpc /root/par2cmdline \
-&& apk del gcc g++ autoconf automake make git patch perl-dev expat-dev curl wget
+&& apk --no-cache del gcc g++ autoconf automake make git patch perl-dev expat-dev curl wget
 
 COPY files/lighttpd.conf /etc/lighttpd/lighttpd.conf
 COPY files/entrypoint.sh /entrypoint.sh
diff --git a/Dockerfile.v4x b/Dockerfile.v4x
index 332527d..90c3abe 100644
--- a/Dockerfile.v4x
+++ b/Dockerfile.v4x
@@ -2,9 +2,9 @@ FROM alpine:3.5
 
 MAINTAINER Adrien Ferrand <ferrand.ad@gmail.com>
 
-ENV BACKUPPC_VERSION 4.1.1
-ENV BACKUPPC_XS_VERSION 0.53
-ENV RSYNC_BPC_VERSION 3.0.9.6
+ENV BACKUPPC_VERSION 4.0.0
+ENV BACKUPPC_XS_VERSION 0.50
+ENV RSYNC_BPC_VERSION 3.0.9.5
 ENV PAR2_VERSION v0.7.0
 
 RUN apk --no-cache add \
@@ -43,7 +43,7 @@ supervisor rsync samba-client iputils openssh openssl rrdtool msmtp lighttpd lig
 && touch /firstrun \
 # Clean
 && rm -rf /root/backuppc-xs /root/rsync-bpc /root/par2cmdline \
-&& apk del gcc g++ autoconf automake make git patch perl-dev expat-dev curl wget
+&& apk --no-cache del gcc g++ autoconf automake make git patch perl-dev expat-dev curl wget
 
 COPY files/lighttpd.conf /etc/lighttpd/lighttpd.conf
 COPY files/entrypoint.sh /entrypoint.sh
diff --git a/VERSION b/VERSION
index 627a3f4..0c89fc9 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-4.1.1
+4.0.0
\ No newline at end of file
diff --git a/files/entrypoint.sh b/files/entrypoint.sh
index 0aef891..13e0ab3 100755
--- a/files/entrypoint.sh
+++ b/files/entrypoint.sh
@@ -21,7 +21,7 @@ if [ -f /firstrun ]; then
 	cd /root/BackupPC-$BACKUPPC_VERSION
 
 	# Install BackupPC (existing configuration will be reused and upgraded)
-	./configure.pl \
+	perl configure.pl \
 		--batch \
 		--config-dir /etc/backuppc \
 		--cgi-dir /var/www/cgi-bin/BackupPC \