diff --git a/silkaj/commands.py b/silkaj/commands.py
index 092b499eef2bf739cb21f1b5e9da2c9d892f7b6a..d65a124d6481657809f0514968559881f00a9810 100644
--- a/silkaj/commands.py
+++ b/silkaj/commands.py
@@ -16,10 +16,12 @@
 from collections import OrderedDict
 from operator import itemgetter
 from os import system
+from typing import Dict, List, Tuple
 
 import jsonschema
 from click import IntRange, argument, command, option
 from duniterpy.api import bma
+from duniterpy.api.client import WSConnection
 from pendulum import from_timestamp
 from tabulate import tabulate
 from websocket._exceptions import WebSocketConnectionClosedException
@@ -32,7 +34,7 @@ from silkaj.wot_tools import identity_of
 
 
 @command("info", help="Display information about currency")
-def currency_info():
+def currency_info() -> None:
     head_block = get_head_block()
     ep = determine_endpoint()
     current_time = from_timestamp(head_block["time"], tz="local")
@@ -58,7 +60,7 @@ def currency_info():
     )
 
 
-def match_pattern(pow, match="", p=1):
+def match_pattern(pow: int, match: str = "", p: int = 1) -> Tuple[str, int]:
     while pow > 0:
         if pow >= 16:
             match += "0"
@@ -71,7 +73,7 @@ def match_pattern(pow, match="", p=1):
     return f"{match}*", p
 
 
-def power(nbr, pow=0):
+def power(nbr: float, pow: int = 0) -> str:
     while nbr >= 10:
         nbr /= 10
         pow += 1
@@ -82,7 +84,7 @@ def power(nbr, pow=0):
     "diffi",
     help="Display the current Proof of Work difficulty level to generate the next block",
 )
-def difficulties():
+def difficulties() -> None:
     client = client_instance()
     try:
         ws = client(bma.ws.block)
@@ -95,7 +97,7 @@ def difficulties():
         print(f"{str(e.__class__.__name__)}: {str(e)}")
 
 
-def display_diffi(current, diffi):
+def display_diffi(current: WSConnection, diffi: Dict) -> None:
     levels = [OrderedDict((i, d[i]) for i in ("uid", "level")) for d in diffi["levels"]]
     diffi["levels"] = levels
     issuers = 0
@@ -125,7 +127,7 @@ Common Proof-of-Work difficulty level: {current["powMin"]}, hash starting with `
     is_flag=True,
     help="Force detailed view. Compact view happen over 30 blocks",
 )
-def list_blocks(number, detailed):
+def list_blocks(number: int, detailed: bool) -> None:
     head_block = get_head_block()
     current_nbr = head_block["number"]
     if number == 0:
@@ -169,7 +171,7 @@ def list_blocks(number, detailed):
         )
         print(f"\n{table}")
     else:
-        list_issued = list()
+        list_issued = list()  # type: List[OrderedDict]
         for issuer in issuers:
             found = False
             for issued in list_issued:
@@ -196,7 +198,7 @@ def list_blocks(number, detailed):
 
 
 @command("argos", help="Display currency information formatted for Argos or BitBar")
-def argos_info():
+def argos_info() -> None:
     head_block = get_head_block()
     currency_symbol = get_currency_symbol()
     print(currency_symbol, "|")