diff --git a/README.md b/README.md
new file mode 100644
index 0000000..ea3d95d
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+to update you need:
+
+apt install python3-pip python3.4 python3.5 python3.4-dev python3.5-dev
diff --git a/update.sh b/update.sh
index 1dc64ab..6cff9c0 100755
--- a/update.sh
+++ b/update.sh
@@ -1,7 +1,8 @@
-HOME=`pwd`/home
-mkdir $HOME
-export PIP_DOWNLOAD_CACHE=$HOME/../../../pip_cache
-cat ../../openmedialibrary/requirements.txt \
+#!/bin/bash
+set -e
+cd `dirname $0`
+export PIP_DOWNLOAD_CACHE=`pwd`/../pip_cache
+cat ../openmedialibrary/requirements.txt \
     | grep -v lxml \
     | grep -v pyopenssl \
     | grep -v pyCrypto \
@@ -10,15 +11,26 @@ cat ../../openmedialibrary/requirements.txt \
     > requirements.txt
 echo setuptools >> requirements.txt
 echo six >> requirements.txt
-pip3 install -r requirements.txt -I --user
 mkdir old
-mv lib bin old
-mv home/.local/lib lib
-test -e home/.local/bin && mv home/.local/bin bin
+test -e lib && mv lib old/
+test -e bin && mv bin old/
+
+rm -rf p34 p35
+
+virtualenv -p /usr/bin/python3.4 p34
+p34/bin/pip3 install -r requirements.txt
+
+mkdir -p lib/python3.4
+mv p34/lib/python3.4/site-packages lib/python3.4/site-packages
 
 virtualenv -p /usr/bin/python3.5 p35
-p35/bin/pip3 install ed25519
-cp p35/lib/python3.5/site-packages/ed25519/_ed25519.cpython-35m-x86_64-linux-gnu.so lib/python3.4/site-packages/ed25519/_ed25519.cpython-35m-x86_64-linux-gnu.so
+p35/bin/pip3 install -r requirements.txt
+for f in site-packages/ed25519/_ed25519.cpython-35m-x86_64-linux-gnu.so \
+    site-packages/sqlalchemy/cprocessors.cpython-35m-x86_64-linux-gnu.so \
+    site-packages/sqlalchemy/cresultproxy.cpython-35m-x86_64-linux-gnu.so \
+    site-packages/sqlalchemy/cutils.cpython-35m-x86_64-linux-gnu.so
+do
+    cp p35/lib/python3.5/$f lib/python3.4/$f
+done
 
-rm -r home old requirements.txt p35
-#sed -i "s#bin/python#bin/env python#" bin/gunicorn
+rm -r p34 p35 old requirements.txt