diff --git a/Dockerfile b/Dockerfile
index 489fe48..92bb7ef 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:2.7.5-alpine AS ruby-builder
+FROM ruby:3.1.2-alpine AS ruby-builder
 
 RUN apk add --update build-base 
 
@@ -19,7 +19,7 @@ RUN yarn run build
 # Re-install only production for final layer
 RUN rm -rf node_modules && yarn install --production
 
-FROM nginx:1.19.6-alpine AS final-stage
+FROM nginx:1.22.0-alpine AS final-stage
 ARG TARGETPLATFORM
 
 # Delete sym links from nginx image, install logrotate
@@ -50,7 +50,7 @@ RUN export ARCH=$(echo $TARGETPLATFORM | cut -d'/' -f2 | sed 's/arm64/aarch64/')
     rm /etc/nginx/conf.d/default.conf && \
     apk add --update \
     # From original image
-    python2 ruby=2.7.5-r0 iproute2 apache2-utils logrotate openssl \
+    python3 ruby=3.1.2-r0 iproute2 apache2-utils logrotate openssl \
     # For Typescript app
     nodejs \
     && \
diff --git a/fs_overlay/opt/certs_manager/certs_manager.rb b/fs_overlay/opt/certs_manager/certs_manager.rb
index 75336f0..7cdecf6 100644
--- a/fs_overlay/opt/certs_manager/certs_manager.rb
+++ b/fs_overlay/opt/certs_manager/certs_manager.rb
@@ -69,7 +69,7 @@ def reconfig
       ident = filename.include?('ssl') ? filename.delete_suffix('.ssl.conf') : filename.delete_suffix('.conf')
       unless names.include? ident
         puts "Deleting old #{filename} configuration..."
-        system "rm /etc/nginx/conf.d/#{filename}"
+        system "/bin/rm /etc/nginx/conf.d/#{filename}"
       end
     end
     ensure_signed(domains)
diff --git a/fs_overlay/opt/certs_manager/lib/acme.rb b/fs_overlay/opt/certs_manager/lib/acme.rb
index 3787ae7..a0fa647 100644
--- a/fs_overlay/opt/certs_manager/lib/acme.rb
+++ b/fs_overlay/opt/certs_manager/lib/acme.rb
@@ -24,7 +24,7 @@ def self.le_sign(domain)
       puts "Signing certificates from #{domain.ca} ..."
 
       command = <<-EOC
-        acme_tiny \
+          /bin/acme_tiny \
           --account-key #{NAConfig.portal_base_dir}/account.key \
           --csr #{domain.csr_path} \
           --acme-dir /var/www/default/challenges/ \
diff --git a/fs_overlay/opt/certs_manager/lib/commands.rb b/fs_overlay/opt/certs_manager/lib/commands.rb
index 6a45de8..015e413 100644
--- a/fs_overlay/opt/certs_manager/lib/commands.rb
+++ b/fs_overlay/opt/certs_manager/lib/commands.rb
@@ -5,11 +5,11 @@ module Commands
 
   def chain_certs(domain)
     # Keeping it for backward compatibility
-    system "test ! -e #{domain.chained_cert_path} && ln -s #{domain.signed_cert_path} #{domain.chained_cert_path}"
+    system "/usr/bin/test ! -e #{domain.chained_cert_path} && ln -s #{domain.signed_cert_path} #{domain.chained_cert_path}"
   end
 
   def mkdir(domain)
-    system "mkdir -p #{domain.dir}"
+    system "/bin/mkdir -p #{domain.dir}"
   end
 
   def add_dockerhost_to_hosts
@@ -23,7 +23,7 @@ def add_dockerhost_to_hosts
   def generate_ht_access(domains)
     domains.each do |domain|
       if domain.basic_auth_enabled?
-        system "htpasswd -bc #{domain.htaccess_path} #{domain.basic_auth_username} #{domain.basic_auth_password}"
+        system "/usr/bin/htpasswd -bc #{domain.htaccess_path} #{domain.basic_auth_username} #{domain.basic_auth_password}"
       end
     end
   end
diff --git a/fs_overlay/opt/certs_manager/lib/erb_binding.rb b/fs_overlay/opt/certs_manager/lib/erb_binding.rb
index d6942be..76693cb 100644
--- a/fs_overlay/opt/certs_manager/lib/erb_binding.rb
+++ b/fs_overlay/opt/certs_manager/lib/erb_binding.rb
@@ -13,7 +13,7 @@ def get
     end
   end
 
-  def initialize(template_path, **binding_hash)
+  def initialize(template_path, binding_hash)
     @template = File.read(template_path)
     @binding_hash = binding_hash
   end
diff --git a/fs_overlay/opt/certs_manager/lib/nginx.rb b/fs_overlay/opt/certs_manager/lib/nginx.rb
index 2445eeb..eec4953 100644
--- a/fs_overlay/opt/certs_manager/lib/nginx.rb
+++ b/fs_overlay/opt/certs_manager/lib/nginx.rb
@@ -1,6 +1,6 @@
 module Nginx
   def self.setup
-    compiled_basic_config = ERBBinding.new('/var/lib/nginx-conf/nginx.conf.erb').compile
+    compiled_basic_config = ERBBinding.new('/var/lib/nginx-conf/nginx.conf.erb', {}).compile
 
     File.open('/etc/nginx/nginx.conf', 'w') do |f|
       f.write compiled_basic_config
@@ -24,15 +24,15 @@ def self.config_ssl(domain)
   end
 
   def self.start
-    system 'nginx -q'
+    system '/usr/sbin/nginx -q'
   end
 
   def self.reload
-    system 'nginx -s reload'
+    system '/usr/sbin/nginx -s reload'
   end
 
   def self.stop
-    system 'nginx -s stop'
+    system '/usr/sbin/nginx -s stop'
   end
 
   private
diff --git a/fs_overlay/opt/certs_manager/lib/open_ssl.rb b/fs_overlay/opt/certs_manager/lib/open_ssl.rb
index f51776e..a87c41f 100644
--- a/fs_overlay/opt/certs_manager/lib/open_ssl.rb
+++ b/fs_overlay/opt/certs_manager/lib/open_ssl.rb
@@ -7,21 +7,21 @@ module OpenSSL
   def self.ensure_account_key
     path = "#{NAConfig.portal_base_dir}/account.key"
     unless File.exist?(path) && system("openssl rsa --in #{path} --noout --check")
-      system "openssl genrsa 4096 > #{path}"
+      system "/usr/bin/openssl genrsa 4096 > #{path}"
     end
   end
 
   def self.ensure_domain_key(domain)
     unless File.exist?(domain.key_path) && system("openssl rsa --in #{domain.key_path} --noout --check")
-      system "openssl genrsa #{NAConfig.key_length} > #{domain.key_path}"
+      system "/usr/bin/openssl genrsa #{NAConfig.key_length} > #{domain.key_path}"
     end
   end
 
   def self.create_csr(domain)
     if domain.stage == 'dappnode-api'
-      system "openssl req -new -sha256 -key #{domain.key_path} -subj '/CN=#{domain.global}' -addext 'subjectAltName = DNS:*.#{domain.global}' > #{domain.csr_path}"
+      system "/usr/bin/openssl req -new -sha256 -key #{domain.key_path} -subj '/CN=#{domain.global}' -addext 'subjectAltName = DNS:*.#{domain.global}' > #{domain.csr_path}"
     else
-      system "openssl req -new -sha256 -key #{domain.key_path} -subj '/CN=#{domain.name}' > #{domain.csr_path}"
+      system "/usr/bin/openssl req -new -sha256 -key #{domain.key_path} -subj '/CN=#{domain.name}' > #{domain.csr_path}"
     end
   end
 
@@ -29,8 +29,8 @@ def self.need_to_sign_or_renew?(domain)
     return true if NAConfig.force_renew?
 
     if File.exist?(domain.key_path) && File.exist?(domain.signed_cert_path)
-      cert_pubkey =  `openssl x509 -pubkey -noout -in #{domain.signed_cert_path}`
-      priv_pubkey =  `openssl rsa -in #{domain.key_path} -pubout`
+      cert_pubkey =  `/usr/bin/openssl x509 -pubkey -noout -in #{domain.signed_cert_path}`
+      priv_pubkey =  `/usr/bin/openssl rsa -in #{domain.key_path} -pubout`
     else
       return true
     end
@@ -47,7 +47,7 @@ def self.expires_in_days(pem)
 
   def self.ensure_dhparam
     unless dhparam_valid?(NAConfig.dhparam_path)
-      system "mkdir -p #{File.dirname(NAConfig.dhparam_path)} && openssl dhparam -out #{NAConfig.dhparam_path} 2048"
+      system "/bin/mkdir -p #{File.dirname(NAConfig.dhparam_path)} && /usr/bin/openssl dhparam -out #{NAConfig.dhparam_path} 2048"
     end
   end
 
@@ -57,7 +57,7 @@ def self.self_sign(domain)
     ensure_domain_key(domain)
 
     command = <<-EOC
-    openssl x509 -req -days 90 \
+    /usr/bin/openssl x509 -req -days 90 \
       -in #{domain.csr_path} \
       -signkey #{domain.key_path} \
       -out #{domain.signed_cert_path}
@@ -87,7 +87,7 @@ def self.send_api_request(domain, certapi_url, signature, address, timestamp, fo
     end
     raise "An error occured during API call to the signing service: #{response.to_str}" unless response.code == 200
     File.write(domain.signed_cert_path, response.to_str)
-    system "test ! -e #{domain.chained_cert_path} && ln -s #{domain.signed_cert_path} #{domain.chained_cert_path}"
+    system "/usr/bin/test ! -e #{domain.chained_cert_path} && ln -s #{domain.signed_cert_path} #{domain.chained_cert_path}"
   end
 
   def self.api_sign(domain)
@@ -96,8 +96,8 @@ def self.api_sign(domain)
     certapi_url = ENV['CERTAPI_URL']
     force = ENV['FORCE'] || 0
     send_api_request(domain, certapi_url, signature, address, timestamp, force)
-    cert_pubkey =  `openssl x509 -pubkey -noout -in #{domain.signed_cert_path}`
-    priv_pubkey =  `openssl rsa -in #{domain.key_path} -pubout`
+    cert_pubkey =  `/usr/bin/openssl x509 -pubkey -noout -in #{domain.signed_cert_path}`
+    priv_pubkey =  `/usr/bin/openssl rsa -in #{domain.key_path} -pubout`
     unless cert_pubkey == priv_pubkey
       puts 'Keys do not match, trying forcing certification service'
       send_api_request(domain, certapi_url, signature, address, timestamp, 1)
@@ -112,7 +112,7 @@ def self.generate_dummy_certificate(dir, out_path, keyout_path)
 
     command = <<-EOC
       mkdir -p #{dir} && \
-      openssl req -x509 -newkey \
+      /usr/bin/openssl req -x509 -newkey \
         rsa:#{NAConfig.key_length} -nodes \
         -out #{out_path} \
         -keyout #{keyout_path} \
@@ -127,11 +127,11 @@ def self.generate_dummy_certificate(dir, out_path, keyout_path)
   private
 
   def self.expires_at(pem)
-    date_str = `openssl x509 -enddate -noout -in #{pem}`.sub('notAfter=', '')
+    date_str = `/usr/bin/openssl x509 -enddate -noout -in #{pem}`.sub('notAfter=', '')
     Date.parse date_str
   end
 
   def self.dhparam_valid?(path)
-    File.exist?(path) && system("openssl dhparam -check < #{path}")
+    File.exist?(path) && system("/usr/bin/openssl dhparam -check < #{path}")
   end
 end