diff --git a/doc/utils.md b/doc/utils.md
new file mode 100644
index 0000000000000000000000000000000000000000..83efc8c15ebf4b30309e516cad62e0c2168a3948
--- /dev/null
+++ b/doc/utils.md
@@ -0,0 +1,55 @@
+
+# Deployment
+
+## Deploy script
+ 
+This is a script example, that you can use to deploy the latest release.
+  
+This script will create or replace a directory name `cesium`, where application will be unpack.
+ 
+**Be aware** that the destination directory will be created **where the script is**.
+
+```bash
+#!/bin/bash
+
+READLINK=`which readlink`
+if [ -z "$READLINK"  ]; then
+  message "Required tool 'readlink' is missing. Please install before launch \"$0\" file."
+  exit 1
+fi
+
+# ------------------------------------------------------------------
+# Ensure BASEDIR points to the directory where the soft is installed.
+# ------------------------------------------------------------------
+SCRIPT_LOCATION=$0
+if [ -x "$READLINK" ]; then
+  while [ -L "$SCRIPT_LOCATION" ]; do
+    SCRIPT_LOCATION=`"$READLINK" -e "$SCRIPT_LOCATION"`
+  done
+fi
+
+export BASEDIR=`dirname "$SCRIPT_LOCATION"`
+
+cd $BASEDIR
+
+echo "Installing cesium into '$BASEDIR/cesium'..."
+
+wget -qO- https://raw.githubusercontent.com/duniter/cesium/master/install.sh | bash
+
+export VERSION=`sed -rn "s/\s*\"version\": \"([^\"]*)\",\s*/\1/p" cesium/config.js`
+export BUILD=`sed -rn "s/\s*\"build\": \"([^\"]*)\",\s*/\1/p" cesium/config.js`
+echo "Detected version: $VERSION"
+echo "           build: $BUILD"
+
+if [ -e "$BASEDIR/config.js" ]; then
+  echo "Override config file using '$BASEDIR/config.js'"
+  cp -f cesium/config.js cesium/config.js.ori
+  cp -f config.js cesium/
+  
+  # Keep version and build from original config file
+  sed -i "s/\"version\": \"[^\"]*\"/\"version\": \"${VERSION}\"/g" cesium/config.js
+  sed -i "s/\"build\": \"[^\"]*\"/\"build\": \"${BUILD}\"/g" cesium/config.js
+fi
+
+echo "Done !"
+```
\ No newline at end of file
diff --git a/www/js/services/wallet-services.js b/www/js/services/wallet-services.js
index 7d1d11ee640d7d12eb6377d42b295040cdfc0bd9..374cc7a29583d0bf9bc5be4580142840c814365c 100644
--- a/www/js/services/wallet-services.js
+++ b/www/js/services/wallet-services.js
@@ -662,7 +662,7 @@ angular.module('cesium.wallet.services', ['ngResource', 'ngApi', 'cesium.bma.ser
           (data.parameters.sigQty - data.requirements.certificationCount) : 0;
       data.requirements.willNeedCertificationCount = (!data.requirements.needMembership &&
           data.requirements.needCertificationCount === 0 && (data.requirements.certificationCount - data.requirements.willExpireCertificationCount) < data.parameters.sigQty) ?
-          (data.parameters.sigQty - data.requirements.certificationCount - willExpireCertificationCount) : 0;
+          (data.parameters.sigQty - data.requirements.certificationCount - data.requirements.willExpireCertificationCount) : 0;
 
       // Add user events
       data.events = data.events.reduce(function(res, event) {