diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0117c7bb1..4a2d5be27 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog Fab-manager
 
+## v4.5.3 2020 July 21
+
+- Documentation of the easy upgrade procedure
+- Fix a bug: unable to seed the database
+- Fix a security issue: updated lodash to 4.17.19 to fix [lodash#4744](https://github.com/lodash/lodash/issues/4744)
+
 ## v4.5.2 2020 July 1st
 
 - Fix a bug: unable to set stripe public key in production
diff --git a/db/seeds.rb b/db/seeds.rb
index 32a798a6c..6323770f1 100644
--- a/db/seeds.rb
+++ b/db/seeds.rb
@@ -603,7 +603,7 @@ Setting.set('invoice_VAT-active', false) unless Setting.find_by(name: 'invoice_V
 
 Setting.set('invoice_VAT-rate', 20.0) unless Setting.find_by(name: 'invoice_VAT-rate').try(:value)
 
-Setting.set('invoice_text', t('invoices.invoice_text_example')) unless Setting.find_by(name: 'invoice_text').try(:value)
+Setting.set('invoice_text', I18n.t('invoices.invoice_text_example')) unless Setting.find_by(name: 'invoice_text').try(:value)
 
 unless Setting.find_by(name: 'invoice_legals').try(:value)
   setting = Setting.find_or_initialize_by(name: 'invoice_legals')
diff --git a/doc/production_readme.md b/doc/production_readme.md
index ef4acbfb4..820e6c300 100644
--- a/doc/production_readme.md
+++ b/doc/production_readme.md
@@ -132,6 +132,27 @@ docker-compose ps
 docker-compose run --rm -e VAR1=xxx -e VAR2=xxx fabmanager bundle exec rails my:command
 ```
 <a name="update-fabmanager"></a>
+
+## Easy upgrade
+
+Starting with Fab-manager v4.5.0, you can upgrade Fab-manager in one single easy command, that automates the procedure below.
+To upgrade with ease, using this helper, read the GitHub release notes of the version between your current version and the target version.
+
+**You MUST append all the arguments** of easy upgrade commands, for **each versions**, to the command you run.
+
+Eg.
+If you upgrade from 1.2.3 to 1.2.5, with the following release notes:
+```markdown
+## 1.2.4
+\curl -sSL upgrade.fab-manager.com | bash -s -- -e "VAR=value"
+## 1.2.5
+\curl -sSL upgrade.fab-manager.com | bash -s -- -c "rails fablab:setup:command"
+```
+Then, you'll need to perform the upgrade with the following command:
+```bash
+\curl -sSL upgrade.fab-manager.com | bash -s -- -e "VAR=value" -c "rails fablab:setup:command"
+```
+
 ## Update Fab-manager
 
 *This procedure updates Fab-manager to the most recent version by default.*
diff --git a/package.json b/package.json
index 2f6634ea9..647d12ba6 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "fab-manager",
-  "version": "4.5.2",
+  "version": "4.5.3",
   "description": "Fab-manager is the FabLab management solution. It provides a comprehensive, web-based, open-source tool to simplify your administrative tasks and your marker's projects.",
   "keywords": [
     "fablab",
diff --git a/yarn.lock b/yarn.lock
index efa0666d5..8bbe32da9 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1061,9 +1061,9 @@ locate-path@^2.0.0:
     path-exists "^3.0.0"
 
 lodash@^4.17.14, lodash@^4.17.15:
-  version "4.17.15"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
-  integrity sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==
+  version "4.17.19"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.19.tgz#e48ddedbe30b3321783c5b4301fbd353bc1e4a4b"
+  integrity sha512-JNvd8XER9GQX0v2qJgsaN/mzFCNA5BRe/j8JN9d+tWyGLSodKQHKFicdwNYzWwI3wjRnaKPsGj1XkBjx/F96DQ==
 
 make-plural@~3.0.6:
   version "3.0.6"