diff --git a/config/artik10.cfg b/config/artik10.cfg
index 8f0613c..a9ebab3 100644
--- a/config/artik10.cfg
+++ b/config/artik10.cfg
@@ -29,7 +29,7 @@ export EMMC_TZSW_OFFSET=2110
 export EMMC_ENV_OFFSET=4159
 
 export RELEASE_VER=artik_os_1.1.0
-export ROOTFS_BASE_URL=https://github.com/SamsungARTIK/fedora-spin-kickstarts/releases/download/
+export ROOTFS_BASE_URL=https://github.com/SamsungARTIK/fedora-spin-kickstarts/releases
 export ROOTFS_FILE=fedora-arm-artik-rootfs-20160418194834.tar.gz
 export ROOTFS_FILE_MD5=b7ced636f0dac7953fc75f5e9617dcad
 export ROOTFS_TAG=release/artik1020/${RELEASE_VER}
diff --git a/config/artik305s_ubuntu.cfg b/config/artik305s_ubuntu.cfg
index e312d58..ae3ccd0 100644
--- a/config/artik305s_ubuntu.cfg
+++ b/config/artik305s_ubuntu.cfg
@@ -1,6 +1,8 @@
 . config/artik305s.cfg
 
-OFFICIAL_VERSION=A305s_os_3.0.0
-OS_NAME=ubuntu
-UBUNTU_MODULE_DEB_DIR=$ARTIK_BUILD_DIR/../ubuntu-build-service/prebuilt/armhf/artik305s
-UBUNTU_PACKAGE_FILE=config/artik305_ubuntu.package
+export OFFICIAL_VERSION=A305s_os_3.0.0
+export ROOTFS_BASE_URL=https://github.com/SamsungARTIK/ubuntu-build-service/releases
+export ROOTFS_FILE_MD5=
+export OS_NAME=ubuntu
+export UBUNTU_MODULE_DEB_DIR=$ARTIK_BUILD_DIR/../ubuntu-build-service/prebuilt/armhf/artik305s
+export UBUNTU_PACKAGE_FILE=config/artik305_ubuntu.package
diff --git a/config/artik530.cfg b/config/artik530.cfg
index 061a521..e4c4ad3 100644
--- a/config/artik530.cfg
+++ b/config/artik530.cfg
@@ -35,7 +35,7 @@ export BLMON_OFFSET=513
 export UBOOT_OFFSET=3841
 export ENV_OFFSET=5889
 
-export ROOTFS_BASE_URL=https://github.com/SamsungARTIK/fedora-spin-kickstarts/releases/download/
+export ROOTFS_BASE_URL=https://github.com/SamsungARTIK/fedora-spin-kickstarts/releases
 export ROOTFS_FILE=fedora-arm-artik530-rootfs-0530GC0F-44F-01Q5-20170710.170216-4c0d561a2c008d8ff08a6865fc505df8.tar.gz
 export ROOTFS_FILE_MD5=4c0d561a2c008d8ff08a6865fc505df8
 export ROOTFS_TAG=release/${OFFICIAL_VERSION}
diff --git a/config/artik530_ubuntu.cfg b/config/artik530_ubuntu.cfg
index eb1a7c7..d28a433 100644
--- a/config/artik530_ubuntu.cfg
+++ b/config/artik530_ubuntu.cfg
@@ -1,10 +1,9 @@
 . config/artik530.cfg
 
 export OFFICIAL_VERSION=A530_os_3.0.0
-export ROOTFS_BASE_URL=https://github.com/SamsungARTIK/ubuntu-build-service/releases/download/
-export ROOTFS_FILE=ubuntu-arm-artik530-rootfs-0530GC0F-44U-01Q1-20170824.170641-ea9a114094c13d516370fb6e3bb0412e.tar.gz
-export ROOTFS_FILE_MD5=ea9a114094c13d516370fb6e3bb0412e
-export ROOTFS_TAG=release/${OFFICIAL_VERSION}
+export PREVIOUS_VERSION=A530_os_3.0.0
+export ROOTFS_BASE_URL=https://github.com/SamsungARTIK/ubuntu-build-service/releases
+export ROOTFS_FILE_MD5=
 export OS_NAME=ubuntu
 export UBUNTU_MODULE_DEB_DIR=$ARTIK_BUILD_DIR/../ubuntu-build-service/prebuilt/armhf/artik530
 export UBUNTU_PACKAGE_FILE=config/artik530_ubuntu.package
diff --git a/config/artik530s_ubuntu.cfg b/config/artik530s_ubuntu.cfg
index d0c345e..7bf13fc 100644
--- a/config/artik530s_ubuntu.cfg
+++ b/config/artik530s_ubuntu.cfg
@@ -1,11 +1,9 @@
 . config/artik530s.cfg
 
 export OFFICIAL_VERSION=A530s_os_3.2.0
-export OS_NAME=ubuntu
-export ROOTFS_BASE_URL=https://github.com/SamsungARTIK/ubuntu-build-service/releases/download/
-export ROOTFS_FILE=ubuntu-arm-artik530s-rootfs-0530GS0F-44U-01Q3-20180316.154231-8c8d75175e3098c14f730e18da7ada36.tar.gz
-export ROOTFS_FILE_MD5=8c8d75175e3098c14f730e18da7ada36
-export ROOTFS_TAG=release/A530s_os_3.2.0
+export PREVIOUS_VERSION=A530s_os_3.0.0
+export ROOTFS_BASE_URL=https://github.com/SamsungARTIK/ubuntu-build-service/releases
+export ROOTFS_FILE_MD5=
 export OS_NAME=ubuntu
 export UBUNTU_MODULE_DEB_DIR=$ARTIK_BUILD_DIR/../ubuntu-build-service/prebuilt/armhf/artik530s
 export UBUNTU_PACKAGE_FILE=config/artik530_ubuntu.package
diff --git a/config/artik533s_ubuntu.cfg b/config/artik533s_ubuntu.cfg
index 2d9bcf6..65dce3f 100644
--- a/config/artik533s_ubuntu.cfg
+++ b/config/artik533s_ubuntu.cfg
@@ -1,10 +1,9 @@
 . config/artik533s.cfg
 
 export OFFICIAL_VERSION=A533s_os_3.2.0
-export ROOTFS_BASE_URL=https://github.com/SamsungARTIK/ubuntu-build-service/releases/download/
-export ROOTFS_FILE=ubuntu-arm-artik533s-rootfs-0533GS0F-44U-01Q5-20180212.183723-6f2026df609b3db536805b7ac3175fa1.tar.gz
-export ROOTFS_FILE_MD5=6f2026df609b3db536805b7ac3175fa1
-export ROOTFS_TAG=release/A533s_os_3.2.0
+export PREVIOUS_VERSION=A533s_os_3.2.0
+export ROOTFS_BASE_URL=https://github.com/SamsungARTIK/ubuntu-build-service/releases
+export ROOTFS_FILE_MD5=
 export OS_NAME=ubuntu
 export UBUNTU_MODULE_DEB_DIR=$ARTIK_BUILD_DIR/../ubuntu-build-service/prebuilt/armhf/artik533s
 export UBUNTU_PACKAGE_FILE=config/artik530_ubuntu.package
diff --git a/config/artik710.cfg b/config/artik710.cfg
index 262b66e..5570cf5 100644
--- a/config/artik710.cfg
+++ b/config/artik710.cfg
@@ -34,7 +34,7 @@ export TZSW_OFFSET=769
 export UBOOT_OFFSET=3841
 export ENV_OFFSET=5889
 
-export ROOTFS_BASE_URL=https://github.com/SamsungARTIK/fedora-spin-kickstarts/releases/download/
+export ROOTFS_BASE_URL=https://github.com/SamsungARTIK/fedora-spin-kickstarts/releases
 export ROOTFS_FILE=fedora-arm-artik710-rootfs-0710GC0F-44F-01QC-20170713.175433-f63a17cbfdaffd3385f23ea12388999a.tar.gz
 export ROOTFS_FILE_MD5=f63a17cbfdaffd3385f23ea12388999a
 export ROOTFS_TAG=release/${OFFICIAL_VERSION}
diff --git a/config/artik710_ubuntu.cfg b/config/artik710_ubuntu.cfg
index 2118bd8..52d1235 100644
--- a/config/artik710_ubuntu.cfg
+++ b/config/artik710_ubuntu.cfg
@@ -1,10 +1,9 @@
 . config/artik710.cfg
 
 export OFFICIAL_VERSION=A710_os_3.1.0
-export ROOTFS_BASE_URL=https://github.com/SamsungARTIK/ubuntu-build-service/releases/download/
-export ROOTFS_FILE=ubuntu-arm-artik710-rootfs-0710GC0F-44U-01Q3-20171113.171659-d159d7ed4107f1a6124c7937c24327aa.tar.gz
-export ROOTFS_FILE_MD5=d159d7ed4107f1a6124c7937c24327aa
-export ROOTFS_TAG=release/A710_os_3.1.0
+export PREVIOUS_VERSION=A710_os_3.0.0
+export ROOTFS_BASE_URL=https://github.com/SamsungARTIK/ubuntu-build-service/releases
+export ROOTFS_FILE_MD5=
 export OS_NAME=ubuntu
 export UBUNTU_MODULE_DEB_DIR=$ARTIK_BUILD_DIR/../ubuntu-build-service/prebuilt/arm64/artik710
 export UBUNTU_PACKAGE_FILE=config/artik710_ubuntu.package
diff --git a/config/artik710s_ubuntu.cfg b/config/artik710s_ubuntu.cfg
index 8f431cc..f215e0e 100644
--- a/config/artik710s_ubuntu.cfg
+++ b/config/artik710s_ubuntu.cfg
@@ -1,10 +1,9 @@
 . config/artik710s.cfg
 
 export OFFICIAL_VERSION=A710s_os_3.2.0
-export ROOTFS_BASE_URL=https://github.com/SamsungARTIK/ubuntu-build-service/releases/download/
-export ROOTFS_FILE=ubuntu-arm-artik710s-rootfs-0710GS0F-44U-01Q5-20180316.154247-d0167e72641c6ce87504e8922a763b91.tar.gz
-export ROOTFS_FILE_MD5=d0167e72641c6ce87504e8922a763b91
-export ROOTFS_TAG=release/A710s_os_3.2.0
+export PREVIOUS_VERSION=A710s_os_3.0.0
+export ROOTFS_BASE_URL=https://github.com/SamsungARTIK/ubuntu-build-service/releases
+export ROOTFS_FILE_MD5=
 export OS_NAME=ubuntu
 export UBUNTU_MODULE_DEB_DIR=$ARTIK_BUILD_DIR/../ubuntu-build-service/prebuilt/arm64/artik710s
 export UBUNTU_PACKAGE_FILE=config/artik710_ubuntu.package
diff --git a/config/artik711s_ubuntu.cfg b/config/artik711s_ubuntu.cfg
index 9a8f019..b7097a9 100644
--- a/config/artik711s_ubuntu.cfg
+++ b/config/artik711s_ubuntu.cfg
@@ -1,10 +1,9 @@
 . config/artik711s.cfg
 
 export OFFICIAL_VERSION=A711s_os_3.2.0
-export ROOTFS_BASE_URL=https://github.com/SamsungARTIK/ubuntu-build-service/releases/download/
-export ROOTFS_FILE=ubuntu-arm-artik710s-rootfs-0710GS0F-44U-01Q1-20171020.132455-8432425c4f2343159225752b10e4f4fc.tar.gz
-export ROOTFS_FILE_MD5=8432425c4f2343159225752b10e4f4fc
-export ROOTFS_TAG=release/A710s_os_3.0.0
+export PREVIOUS_VERSION=A711s_os_3.2.0
+export ROOTFS_BASE_URL=https://github.com/SamsungARTIK/ubuntu-build-service/releases
+export ROOTFS_FILE_MD5=
 export OS_NAME=ubuntu
 export UBUNTU_MODULE_DEB_DIR=$ARTIK_BUILD_DIR/../ubuntu-build-service/prebuilt/arm64/artik710s
 export UBUNTU_PACKAGE_FILE=config/artik710_ubuntu.package
diff --git a/release_rootfs.sh b/release_rootfs.sh
index 30a74c8..58df351 100755
--- a/release_rootfs.sh
+++ b/release_rootfs.sh
@@ -19,12 +19,29 @@ urlencode() {
     done
 }
 
-ROOTFS_TAG=$(urlencode "$ROOTFS_TAG")
-ROOTFS_FILE=$(urlencode "$ROOTFS_FILE")
+retrieve_rootfs_fileinfo()
+{
+	ROOTFS_TAG=$(urlencode release/${OFFICIAL_VERSION})
+	ROOTFS_FILE=`curl -s ${ROOTFS_BASE_URL}/tag/${ROOTFS_TAG} | grep -e ".*download/${ROOTFS_TAG}" | sed -e 's|.*download\/.*\/\([^\"]*\).*$|\1|'`
+	# Try to find a rootfs tarball from previous version
+	if [ "$ROOTFS_FILE" == "" ]; then
+		ROOTFS_TAG=$(urlencode release/${PREVIOUS_VERSION})
+		ROOTFS_FILE=`curl -s ${ROOTFS_BASE_URL}/tag/${ROOTFS_TAG} | grep -e ".*download/${ROOTFS_TAG}" | sed -e 's|.*download\/.*\/\([^\"]*\).*$|\1|'`
+	fi
+	if [ "$ROOTFS_FILE" == "" ]; then
+		echo "Cannot find root filesystem tarball"
+		exit 1
+	fi
+	ROOTFS_FILE_MD5=$(echo $ROOTFS_FILE | sed -e 's/.*[0-9][0-9][0-9][0-9][0-9][0-9]-\([^\.]*\).*/\1/')
+}
+
+if [ "$ROOTFS_FILE_MD5" == "" ]; then
+	retrieve_rootfs_fileinfo
+fi
 
 if [ ! -f $PREBUILT_DIR/$ROOTFS_FILE ]; then
 	echo "Not found rootfs. Download it"
-	wget ${ROOTFS_BASE_URL}/${ROOTFS_TAG}/${ROOTFS_FILE} -O $PREBUILT_DIR/$ROOTFS_FILE
+	wget ${ROOTFS_BASE_URL}/download/${ROOTFS_TAG}/${ROOTFS_FILE} -O $PREBUILT_DIR/$ROOTFS_FILE
 fi
 
 while :
@@ -35,7 +52,7 @@ do
 	fi
 
 	echo "Mismatch MD5 hash. Just download again"
-	wget ${ROOTFS_BASE_URL}/${ROOTFS_TAG}/${ROOTFS_FILE} -O $PREBUILT_DIR/$ROOTFS_FILE
+	wget ${ROOTFS_BASE_URL}/download/${ROOTFS_TAG}/${ROOTFS_FILE} -O $PREBUILT_DIR/$ROOTFS_FILE
 
 	CHECK_COUNT=$((CHECK_COUNT + 1))