diff --git a/conf/custom.py.in b/conf/custom.py.in
new file mode 100644
index 00000000..05e36dec
--- /dev/null
+++ b/conf/custom.py.in
@@ -0,0 +1,2 @@
+# Custom settings
+TIMEOUT = ${TIMEOUT}
\ No newline at end of file
diff --git a/conf/env.in b/conf/env.in
index 916d35e5..7982691f 100644
--- a/conf/env.in
+++ b/conf/env.in
@@ -1 +1 @@
-TIMEOUT="${TIMEOUT}"
+TIMEOUT=${TIMEOUT}
diff --git a/debian/conffiles b/debian/conffiles
index 2f9dbf53..0ef7d9ef 100644
--- a/debian/conffiles
+++ b/debian/conffiles
@@ -1,2 +1,3 @@
+opt/screamshotter/conf/custom.py.in
 opt/screamshotter/conf/env.in
 opt/screamshotter/conf/gunicorn-screamshotter.conf.py.in
diff --git a/debian/install b/debian/install
index fb98e434..e0923ba1 100644
--- a/debian/install
+++ b/debian/install
@@ -1,2 +1,3 @@
+conf/custom.py.in opt/screamshotter/conf
 conf/env.in opt/screamshotter/conf
 conf/gunicorn-screamshotter.conf.py.in opt/screamshotter/conf
\ No newline at end of file
diff --git a/debian/postinst b/debian/postinst
index 7b52d422..604ec4b9 100644
--- a/debian/postinst
+++ b/debian/postinst
@@ -19,10 +19,8 @@ chown -R screamshotter:screamshotter /opt/screamshotter/static || true
 
 # Generate config files
 echo "Generate configuration" >&2
-[ -f /opt/screamshotter/conf/custom.py ] || touch /opt/screamshotter/conf/custom.py
-sed -i "s/TIMEOUT\s*=\s*[0-9]\+/TIMEOUT = "$TIMEOUT"/" /opt/screamshotter/conf/custom.py
 CONF_DIR=/opt/screamshotter/conf
-for f in env gunicorn-screamshotter.conf.py; do
+for f in custom.py env gunicorn-screamshotter.conf.py; do
 	cat > $CONF_DIR/$f << END
 
 # Generated by dpkg installation. DO NOT MODIFY MANUALLY.