diff --git a/shard.yml b/shard.yml
index 2e10eef..69145d6 100644
--- a/shard.yml
+++ b/shard.yml
@@ -33,6 +33,6 @@ dependencies:
         branch: master
     dodb:
         git: https://git.baguette.netlib.re/Baguette/dodb.cr
-        branch: master
+        branch: cbor
 
 license: EUPL
diff --git a/src/authd.cr b/src/authd.cr
index 2b4d0b6..9d72d95 100644
--- a/src/authd.cr
+++ b/src/authd.cr
@@ -1,4 +1,4 @@
-require "json"
+require "cbor"
 require "jwt"
 require "ipc"
 
diff --git a/src/libclient.cr b/src/libclient.cr
index f168f12..395d35d 100644
--- a/src/libclient.cr
+++ b/src/libclient.cr
@@ -1,3 +1,4 @@
+require "ipc/cbor"
 
 module AuthD
 	class Client < IPC::Client
@@ -10,9 +11,9 @@ module AuthD
 		end
 
 		def get_token?(login : String, password : String) : String?
-			send Request::GetToken.new login, password
+			send_now Request::GetToken.new login, password
 
-			response = Response.from_ipc read
+			response = AuthD.responses.parse_ipc_cbor read
 
 			if response.is_a?(Response::Token)
 				response.token
@@ -22,9 +23,9 @@ module AuthD
 		end
 
 		def get_user?(login : String, password : String) : AuthD::User::Public?
-			send Request::GetUserByCredentials.new login, password
+			send_now Request::GetUserByCredentials.new login, password
 
-			response = Response.from_ipc read
+			response = AuthD.responses.parse_ipc_cbor read
 
 			if response.is_a? Response::User
 				response.user
@@ -34,9 +35,9 @@ module AuthD
 		end
 
 		def get_user?(uid_or_login : Int32 | String) : ::AuthD::User::Public?
-			send Request::GetUser.new uid_or_login
+			send_now Request::GetUser.new uid_or_login
 
-			response = Response.from_ipc read
+			response = AuthD.responses.parse_ipc_cbor read
 
 			if response.is_a? Response::User
 				response.user
@@ -45,14 +46,14 @@ module AuthD
 			end
 		end
 
-		def send(type : Request::Type, payload)
+		def send_now(type : Request::Type, payload)
 			send_now @server_fd, type.value.to_u8, payload
 		end
 
 		def decode_token(token)
 			user, meta = JWT.decode token, @key, JWT::Algorithm::HS256
 
-			user = ::AuthD::User::Public.from_json user.to_json
+			user = ::AuthD::User::Public.from_cbor user.to_cbor
 
 			{user, meta}
 		end
@@ -61,11 +62,11 @@ module AuthD
 		def add_user(login : String, password : String,
 			email : String?,
 			phone : String?,
-			profile : Hash(String, JSON::Any)?) : ::AuthD::User::Public | Exception
+			profile : Hash(String, CBOR::Any)?) : ::AuthD::User::Public | Exception
 
-			send Request::AddUser.new @key, login, password, email, phone, profile
+			send_now Request::AddUser.new @key, login, password, email, phone, profile
 
-			response = Response.from_ipc read
+			response = AuthD.responses.parse_ipc_cbor read
 
 			case response
 			when Response::UserAdded
@@ -80,9 +81,9 @@ module AuthD
 		end
 
 		def validate_user(login : String, activation_key : String) : ::AuthD::User::Public | Exception
-			send Request::ValidateUser.new login, activation_key
+			send_now Request::ValidateUser.new login, activation_key
 
-			response = Response.from_ipc read
+			response = AuthD.responses.parse_ipc_cbor read
 
 			case response
 			when Response::UserValidated
@@ -97,8 +98,8 @@ module AuthD
 		end
 
 		def ask_password_recovery(uid_or_login : String | Int32, email : String)
-			send Request::AskPasswordRecovery.new uid_or_login, email
-			response = Response.from_ipc read
+			send_now Request::AskPasswordRecovery.new uid_or_login, email
+			response = AuthD.responses.parse_ipc_cbor read
 
 			case response
 			when Response::PasswordRecoverySent
@@ -110,8 +111,8 @@ module AuthD
 		end
 
 		def change_password(uid_or_login : String | Int32, new_pass : String, renew_key : String)
-			send Request::PasswordRecovery.new uid_or_login, renew_key, new_pass
-			response = Response.from_ipc read
+			send_now Request::PasswordRecovery.new uid_or_login, renew_key, new_pass
+			response = AuthD.responses.parse_ipc_cbor read
 
 			case response
 			when Response::PasswordRecovered
@@ -126,10 +127,10 @@ module AuthD
 			password : String,
 			email : String?,
 			phone : String?,
-			profile : Hash(String, JSON::Any)?) : ::AuthD::User::Public?
+			profile : Hash(String, CBOR::Any)?) : ::AuthD::User::Public?
 
-			send Request::Register.new login, password, email, phone, profile
-			response = Response.from_ipc read
+			send_now Request::Register.new login, password, email, phone, profile
+			response = AuthD.responses.parse_ipc_cbor read
 
 			case response
 			when Response::UserAdded
@@ -146,9 +147,9 @@ module AuthD
 			request.phone    = phone    if phone
 			request.avatar   = avatar   if avatar
 
-			send request
+			send_now request
 
-			response = Response.from_ipc read
+			response = AuthD.responses.parse_ipc_cbor read
 
 			case response
 			when Response::UserEdited
@@ -163,9 +164,9 @@ module AuthD
 		def check_permission(user : Int32, service_name : String, resource_name : String) : User::PermissionLevel
 			request = Request::CheckPermission.new @key, user, service_name, resource_name
 
-			send request
+			send_now request
 
-			response = Response.from_ipc read
+			response = AuthD.responses.parse_ipc_cbor read
 
 			case response
 			when Response::PermissionCheck
@@ -180,9 +181,9 @@ module AuthD
 		def set_permission(uid : Int32, service : String, resource : String, permission : User::PermissionLevel)
 			request = Request::SetPermission.new @key, uid, service, resource, permission
 
-			send request
+			send_now request
 
-			response = Response.from_ipc read
+			response = AuthD.responses.parse_ipc_cbor read
 
 			case response
 			when Response::PermissionSet
@@ -195,8 +196,8 @@ module AuthD
 		end
 
 		def search_user(user_login : String)
-			send Request::SearchUser.new user_login
-			response = Response.from_ipc read
+			send_now Request::SearchUser.new user_login
+			response = AuthD.responses.parse_ipc_cbor read
 
 			case response
 			when Response::MatchingUsers
@@ -209,8 +210,8 @@ module AuthD
 		end
 
 		def edit_profile_content(user : Int32 | String, new_values)
-			send Request::EditProfileContent.new key, user, new_values
-			response = Response.from_ipc read
+			send_now Request::EditProfileContent.new key, user, new_values
+			response = AuthD.responses.parse_ipc_cbor read
 
 			case response
 			when Response::User
@@ -223,15 +224,15 @@ module AuthD
 		end
 
 		def delete(user : Int32 | String, key : String)
-			send Request::Delete.new user, key
+			send_now Request::Delete.new user, key
 			delete_
 		end
 		def delete(user : Int32 | String, login : String, pass : String)
-			send Request::Delete.new user, login, pass
+			send_now Request::Delete.new user, login, pass
 			delete_
 		end
 		def delete_
-			response = Response.from_ipc read
+			response = AuthD.responses.parse_ipc_cbor read
 			case response
 			when Response::Error
 				raise Exception.new response.reason
diff --git a/src/main.cr b/src/main.cr
index 4d925fd..f12cb3b 100644
--- a/src/main.cr
+++ b/src/main.cr
@@ -78,7 +78,7 @@ class AuthD::Service < IPC::Server
 	def handle_request(event : IPC::Event::MessageReceived)
 		request_start = Time.utc
 
-		request = AuthD.requests.parse_ipc_json event.message
+		request = AuthD.requests.parse_ipc_cbor event.message
 
 		if request.nil?
 			raise "unknown request type"
diff --git a/src/network.cr b/src/network.cr
index d74c23b..d828b16 100644
--- a/src/network.cr
+++ b/src/network.cr
@@ -1,28 +1,28 @@
 require "ipc"
-require "json"
-require "ipc/json"
+require "cbor"
+require "ipc/cbor"
 
-class IPC::JSON
+class IPC::CBOR
 	def handle(service : AuthD::Service, event : IPC::Event::Events)
 		raise "unimplemented"
 	end
 end
 
 module AuthD
-	class_getter requests  = [] of IPC::JSON.class
-	class_getter responses = [] of IPC::JSON.class
+	class_getter requests  = [] of IPC::CBOR.class
+	class_getter responses = [] of IPC::CBOR.class
 end
 
 class IPC::Context
 	def send(fd, response : AuthD::Response)
-		send fd, response.type.to_u8, response.to_json
+		send fd, response.type.to_u8, response.to_cbor
 	end
 end
 
 class IPC::Client
 	def send(request : AuthD::Request)
 		unless (fd = @server_fd).nil?
-			send_now fd, request.type.to_u8, request.to_json
+			send_now fd, request.type.to_u8, request.to_cbor
 		else
 			raise "Client not connected to the server"
 		end
diff --git a/src/requests/admin.cr b/src/requests/admin.cr
index 8ff4e54..42f838d 100644
--- a/src/requests/admin.cr
+++ b/src/requests/admin.cr
@@ -1,5 +1,5 @@
 class AuthD::Request
-	IPC::JSON.message AddUser, 1 do
+	IPC::CBOR.message AddUser, 1 do
 		# Only clients that have the right shared key will be allowed
 		# to create users.
 		property shared_key : String
@@ -8,7 +8,7 @@ class AuthD::Request
 		property password   : String
 		property email      : String?                  = nil
 		property phone      : String?                  = nil
-		property profile    : Hash(String, JSON::Any)? = nil
+		property profile    : Hash(String, CBOR::Any)? = nil
 
 		def initialize(@shared_key, @login, @password, @email, @phone, @profile)
 		end
@@ -51,7 +51,7 @@ class AuthD::Request
 	AuthD.requests << AddUser
 
 
-	IPC::JSON.message ModUser, 5 do
+	IPC::CBOR.message ModUser, 5 do
 		property shared_key : String
 
 		property user       : Int32 | String
diff --git a/src/requests/contact.cr b/src/requests/contact.cr
index 5149ebc..733e6a3 100644
--- a/src/requests/contact.cr
+++ b/src/requests/contact.cr
@@ -1,5 +1,5 @@
 class AuthD::Request
-	IPC::JSON.message EditContacts, 16 do
+	IPC::CBOR.message EditContacts, 16 do
 		property token : String
 
 		property email : String? = nil
@@ -26,7 +26,7 @@ class AuthD::Request
 	end
 	AuthD.requests << EditContacts
 
-	IPC::JSON.message GetContacts, 18 do
+	IPC::CBOR.message GetContacts, 18 do
 		property token : String
 
 		def initialize(@token)
diff --git a/src/requests/delete.cr b/src/requests/delete.cr
index e2e30ad..5e41ee8 100644
--- a/src/requests/delete.cr
+++ b/src/requests/delete.cr
@@ -1,5 +1,5 @@
 class AuthD::Request
-	IPC::JSON.message Delete, 17 do
+	IPC::CBOR.message Delete, 17 do
 		# Deletion can be triggered by either an admin or the user.
 		property shared_key : String? = nil
 
diff --git a/src/requests/list.cr b/src/requests/list.cr
index edd05d1..db12146 100644
--- a/src/requests/list.cr
+++ b/src/requests/list.cr
@@ -1,5 +1,5 @@
 class AuthD::Request
-	IPC::JSON.message ListUsers, 8 do
+	IPC::CBOR.message ListUsers, 8 do
 		property token : String? = nil
 		property key   : String? = nil
 
diff --git a/src/requests/password.cr b/src/requests/password.cr
index 646f469..8231eef 100644
--- a/src/requests/password.cr
+++ b/src/requests/password.cr
@@ -1,5 +1,5 @@
 class AuthD::Request
-	IPC::JSON.message UpdatePassword, 7 do
+	IPC::CBOR.message UpdatePassword, 7 do
 		property login      : String
 		property old_password : String
 		property new_password : String
@@ -27,7 +27,7 @@ class AuthD::Request
 	end
 	AuthD.requests << UpdatePassword
 
-	IPC::JSON.message PasswordRecovery, 11 do
+	IPC::CBOR.message PasswordRecovery, 11 do
 		property user               : Int32 | String
 		property password_renew_key : String
 		property new_password       : String
@@ -62,7 +62,7 @@ class AuthD::Request
 	end
 	AuthD.requests << PasswordRecovery
 
-	IPC::JSON.message AskPasswordRecovery, 12 do
+	IPC::CBOR.message AskPasswordRecovery, 12 do
 		property user       : Int32 | String
 		property email      : String
 
diff --git a/src/requests/permissions.cr b/src/requests/permissions.cr
index fdc2b6c..df2f83c 100644
--- a/src/requests/permissions.cr
+++ b/src/requests/permissions.cr
@@ -1,5 +1,5 @@
 class AuthD::Request
-	IPC::JSON.message CheckPermission, 9 do
+	IPC::CBOR.message CheckPermission, 9 do
 		property shared_key : String? = nil
 		property token      : String? = nil
 
@@ -41,8 +41,10 @@ class AuthD::Request
 
 			user = case u = @user
 			when .is_a? Int32
+				puts "searching for the user (Int32): #{u}"
 				authd.users_per_uid.get? u.to_s
 			else
+				puts "searching for the user (string): #{u}"
 				authd.users_per_login.get? u
 			end
 
@@ -68,7 +70,7 @@ class AuthD::Request
 	end
 	AuthD.requests << CheckPermission
 
-	IPC::JSON.message SetPermission, 10 do
+	IPC::CBOR.message SetPermission, 10 do
 		property shared_key : String
 
 		property user       : Int32 | String
diff --git a/src/requests/profile.cr b/src/requests/profile.cr
index daa2a16..048d49b 100644
--- a/src/requests/profile.cr
+++ b/src/requests/profile.cr
@@ -1,7 +1,7 @@
 class AuthD::Request
-	IPC::JSON.message EditProfile, 14 do
+	IPC::CBOR.message EditProfile, 14 do
 		property token : String
-		property new_profile : Hash(String, JSON::Any)
+		property new_profile : Hash(String, CBOR::Any)
 
 		def initialize(@token, @new_profile)
 		end
@@ -13,7 +13,7 @@ class AuthD::Request
 
 			new_profile = @new_profile
 
-			profile = user.profile || Hash(String, JSON::Any).new
+			profile = user.profile || Hash(String, CBOR::Any).new
 
 			authd.configuration.read_only_profile_keys.each do |key|
 				if new_profile[key]? != profile[key]?
@@ -32,13 +32,13 @@ class AuthD::Request
 
 	# Same as above, but doesn’t reset the whole profile, only resets elements
 	# for which keys are present in `new_profile`.
-	IPC::JSON.message EditProfileContent, 15 do
+	IPC::CBOR.message EditProfileContent, 15 do
 		property token      : String? = nil
 
 		property shared_key : String? = nil
 		property user : Int32 | String | Nil
 
-		property new_profile : Hash(String, JSON::Any)
+		property new_profile : Hash(String, CBOR::Any)
 
 		def initialize(@shared_key, @user, @new_profile)
 		end
@@ -68,7 +68,7 @@ class AuthD::Request
 				raise AuthenticationInfoLacking.new
 			end
 
-			new_profile = user.profile || Hash(String, JSON::Any).new
+			new_profile = user.profile || Hash(String, CBOR::Any).new
 
 			unless @shared_key
 				authd.configuration.read_only_profile_keys.each do |key|
diff --git a/src/requests/register.cr b/src/requests/register.cr
index 8407174..e036556 100644
--- a/src/requests/register.cr
+++ b/src/requests/register.cr
@@ -1,10 +1,10 @@
 class AuthD::Request
-	IPC::JSON.message Register, 6 do
+	IPC::CBOR.message Register, 6 do
 		property login      : String
 		property password   : String
 		property email      : String?                  = nil
 		property phone      : String?                  = nil
-		property profile    : Hash(String, JSON::Any)? = nil
+		property profile    : Hash(String, CBOR::Any)? = nil
 
 		def initialize(@login, @password, @email, @phone, @profile)
 		end
diff --git a/src/requests/search.cr b/src/requests/search.cr
index b42f3b6..e03f1a9 100644
--- a/src/requests/search.cr
+++ b/src/requests/search.cr
@@ -1,5 +1,5 @@
 class AuthD::Request
-	IPC::JSON.message SearchUser, 13 do
+	IPC::CBOR.message SearchUser, 13 do
 		property user : String
 
 		def initialize(@user)
diff --git a/src/requests/token.cr b/src/requests/token.cr
index 6749285..f2b9a92 100644
--- a/src/requests/token.cr
+++ b/src/requests/token.cr
@@ -1,5 +1,5 @@
 class AuthD::Request
-	IPC::JSON.message GetToken, 0 do
+	IPC::CBOR.message GetToken, 0 do
 		property login      : String
 		property password   : String
 
diff --git a/src/requests/users.cr b/src/requests/users.cr
index 0bf573b..35d9744 100644
--- a/src/requests/users.cr
+++ b/src/requests/users.cr
@@ -1,5 +1,5 @@
 class AuthD::Request
-	IPC::JSON.message ValidateUser, 2 do
+	IPC::CBOR.message ValidateUser, 2 do
 		property login             : String
 		property activation_key    : String
 
@@ -31,7 +31,7 @@ class AuthD::Request
 	end
 	AuthD.requests << ValidateUser
 
-	IPC::JSON.message GetUser, 3 do
+	IPC::CBOR.message GetUser, 3 do
 		property user       : Int32 | String
 
 		def initialize(@user)
@@ -54,7 +54,7 @@ class AuthD::Request
 	end
 	AuthD.requests << GetUser
 
-	IPC::JSON.message GetUserByCredentials, 4 do
+	IPC::CBOR.message GetUserByCredentials, 4 do
 		property login      : String
 		property password   : String
 
diff --git a/src/responses/contact.cr b/src/responses/contact.cr
index 2ed1d24..3d66bbd 100644
--- a/src/responses/contact.cr
+++ b/src/responses/contact.cr
@@ -1,9 +1,10 @@
 class AuthD::Response
-	IPC::JSON.message Contacts, 12 do
+	IPC::CBOR.message Contacts, 12 do
 		property user : Int32
 		property email : String? = nil
 		property phone : String? = nil
 		def initialize(@user, @email, @phone)
 		end
 	end
+	AuthD.responses << Contacts
 end
diff --git a/src/responses/errors.cr b/src/responses/errors.cr
index 8b4f83f..28699b0 100644
--- a/src/responses/errors.cr
+++ b/src/responses/errors.cr
@@ -1,7 +1,8 @@
 class AuthD::Response
-	IPC::JSON.message Error, 0 do
+	IPC::CBOR.message Error, 0 do
 		property reason : String? = nil
 		def initialize(@reason)
 		end
 	end
+	AuthD.responses << Error
 end
diff --git a/src/responses/password.cr b/src/responses/password.cr
index 40524c4..9009387 100644
--- a/src/responses/password.cr
+++ b/src/responses/password.cr
@@ -1,13 +1,15 @@
 class AuthD::Response
-	IPC::JSON.message PasswordRecoverySent, 9 do
+	IPC::CBOR.message PasswordRecoverySent, 9 do
 		property user   : ::AuthD::User::Public
 		def initialize(@user)
 		end
 	end
+	AuthD.responses << PasswordRecoverySent
 
-	IPC::JSON.message PasswordRecovered, 10 do
+	IPC::CBOR.message PasswordRecovered, 10 do
 		property user   : ::AuthD::User::Public
 		def initialize(@user)
 		end
 	end
+	AuthD.responses << PasswordRecovered
 end
diff --git a/src/responses/permissions.cr b/src/responses/permissions.cr
index ec4d336..6e160cf 100644
--- a/src/responses/permissions.cr
+++ b/src/responses/permissions.cr
@@ -1,5 +1,5 @@
 class AuthD::Response
-	IPC::JSON.message PermissionCheck, 7 do
+	IPC::CBOR.message PermissionCheck, 7 do
 		property user       : Int32
 		property service    : String
 		property resource   : String
@@ -7,8 +7,9 @@ class AuthD::Response
 		def initialize(@service, @resource, @user, @permission)
 		end
 	end
+	AuthD.responses << PermissionCheck
 
-	IPC::JSON.message PermissionSet, 8 do
+	IPC::CBOR.message PermissionSet, 8 do
 		property user       : Int32
 		property service    : String
 		property resource   : String
@@ -16,4 +17,5 @@ class AuthD::Response
 		def initialize(@user, @service, @resource, @permission)
 		end
 	end
+	AuthD.responses << PermissionSet
 end
diff --git a/src/responses/token.cr b/src/responses/token.cr
index 04de31d..0837313 100644
--- a/src/responses/token.cr
+++ b/src/responses/token.cr
@@ -1,8 +1,9 @@
 class AuthD::Response
-	IPC::JSON.message Token, 1 do
+	IPC::CBOR.message Token, 1 do
 		property uid    : Int32
 		property token  : String
 		def initialize(@token, @uid)
 		end
 	end
+	AuthD.responses << Token
 end
diff --git a/src/responses/users.cr b/src/responses/users.cr
index 47c5487..48ce6ec 100644
--- a/src/responses/users.cr
+++ b/src/responses/users.cr
@@ -1,37 +1,43 @@
 class AuthD::Response
-	IPC::JSON.message User, 2 do
+	IPC::CBOR.message User, 2 do
 		property user   : ::AuthD::User::Public
 		def initialize(@user)
 		end
 	end
+	AuthD.responses << User
 
-	IPC::JSON.message UserAdded, 3 do
+	IPC::CBOR.message UserAdded, 3 do
 		property user   : ::AuthD::User::Public
 		def initialize(@user)
 		end
 	end
+	AuthD.responses << UserAdded
 
-	IPC::JSON.message UserEdited, 4 do
+	IPC::CBOR.message UserEdited, 4 do
 		property uid    : Int32
 		def initialize(@uid)
 		end
 	end
+	AuthD.responses << UserEdited
 
-	IPC::JSON.message UserValidated, 5 do
+	IPC::CBOR.message UserValidated, 5 do
 		property user   : ::AuthD::User::Public
 		def initialize(@user)
 		end
 	end
+	AuthD.responses << UserValidated
 
-	IPC::JSON.message UsersList, 6 do
+	IPC::CBOR.message UsersList, 6 do
 		property users  : Array(::AuthD::User::Public)
 		def initialize(@users)
 		end
 	end
+	AuthD.responses << UsersList
 
-	IPC::JSON.message MatchingUsers, 11 do
+	IPC::CBOR.message MatchingUsers, 11 do
 		property users  : Array(::AuthD::User::Public)
 		def initialize(@users)
 		end
 	end
+	AuthD.responses << MatchingUsers
 end
diff --git a/src/token.cr b/src/token.cr
index 5c8d844..79d843f 100644
--- a/src/token.cr
+++ b/src/token.cr
@@ -1,7 +1,7 @@
-require "json"
+require "cbor"
 
 class AuthD::Token
-	include JSON::Serializable
+	include CBOR::Serializable
 
 	property login : String
 	property uid   : Int32
diff --git a/src/user.cr b/src/user.cr
index 00246e9..8315df7 100644
--- a/src/user.cr
+++ b/src/user.cr
@@ -1,11 +1,11 @@
-require "json"
+require "cbor"
 
 require "uuid"
 
 require "./token.cr"
 
 class AuthD::User
-	include JSON::Serializable
+	include CBOR::Serializable
 
 	enum PermissionLevel
 		None
@@ -13,13 +13,13 @@ class AuthD::User
 		Edit
 		Admin
 
-		def to_json(o)
-			to_s.downcase.to_json o
+		def to_cbor(o)
+			to_s.downcase.to_cbor o
 		end
 	end
 
 	class Contact
-		include JSON::Serializable
+		include CBOR::Serializable
 
 		# the activation key is removed once the user is validated
 		property activation_key : String?
@@ -34,7 +34,7 @@ class AuthD::User
 	# Public.
 	property login         : String
 	property uid           : Int32
-	property profile       : Hash(String, JSON::Any)?
+	property profile       : Hash(String, CBOR::Any)?
 
 	# Private.
 	property contact              : Contact
@@ -42,7 +42,7 @@ class AuthD::User
 	property password_renew_key   : String?
 	# service => resource => permission level
 	property permissions          : Hash(String, Hash(String, PermissionLevel))
-	property configuration        : Hash(String, Hash(String, JSON::Any))
+	property configuration        : Hash(String, Hash(String, CBOR::Any))
 	property date_last_connection : Time? = nil
 	property date_registration    : Time? = nil
 
@@ -53,15 +53,15 @@ class AuthD::User
 	def initialize(@uid, @login, @password_hash)
 		@contact       = Contact.new
 		@permissions   = Hash(String, Hash(String, PermissionLevel)).new
-		@configuration = Hash(String, Hash(String, JSON::Any)).new
+		@configuration = Hash(String, Hash(String, CBOR::Any)).new
 	end
 
 	class Public
-		include JSON::Serializable
+		include CBOR::Serializable
 
 		property login   : String
 		property uid     : Int32
-		property profile : Hash(String, JSON::Any)?
+		property profile : Hash(String, CBOR::Any)?
 
 		property date_registration : Time?
 
diff --git a/utils/authc.cr b/utils/authc.cr
index 5edd5a0..9250df7 100644
--- a/utils/authc.cr
+++ b/utils/authc.cr
@@ -1,6 +1,7 @@
 require "option_parser"
 
 require "ipc"
+require "cbor"
 require "yaml"
 
 require "baguette-crystal-base"
@@ -27,7 +28,7 @@ class Context
 
 	class_property command       = "not-implemented"
 
-	class_property user_profile  : Hash(String,JSON::Any)?
+	class_property user_profile  : Hash(String,CBOR::Any)?
 	class_property phone         : String?
 	class_property email         : String?
 
@@ -215,7 +216,7 @@ def main
 	begin
 		actions.the_call[Context.command].call
 	rescue e
-		Baguette::Log.info "The command is not recognized (or implemented)."
+		Baguette::Log.info "#{e}"
 	end
 
 	# authd disconnection
diff --git a/utils/better-parser.cr b/utils/better-parser.cr
index c266e8b..f62cb2f 100644
--- a/utils/better-parser.cr
+++ b/utils/better-parser.cr
@@ -28,7 +28,13 @@ opt_help = -> (parser : OptionParser) {
 
 opt_profile = -> (parser : OptionParser) {
 	parser.on "-P file", "--profile file", "Read the user profile from a file." do |file|
-		Context.user_profile = JSON.parse(File.read file).as_h
+		profile = JSON.parse(File.read file).as_h
+		user_profile = {} of String => CBOR::Any
+		profile.each do |k,v|
+			user_profile[k] = CBOR::Any.new v
+		end
+		Context.user_profile = user_profile
+
 		Baguette::Log.info "Reading the user profile: #{Context.user_profile}."
 	end
 }