diff --git a/network/bin/ip.lua b/network/bin/ip.lua
index 8e421e7..0e501dd 100644
--- a/network/bin/ip.lua
+++ b/network/bin/ip.lua
@@ -13,7 +13,7 @@ if (args[1] == "a") then
         if (itf.ethernet) then
             print(string.format("\tMAC : %s MTU : %d", itf.ethernet:addr(), itf.ethernet:mtu()))
         end
-        if (itf.ip) then
+        if (itf.ip and itf.ip:addr()) then
             print(string.format("\tIP : %s Mask : %s", ipv4.address.tostring(itf.ip:addr()), ipv4.address.tostring(itf.ip:mask())))
         end
     end
diff --git a/network/lib/network/ipv4/address.lua b/network/lib/network/ipv4/address.lua
index 52006de..f9b334c 100644
--- a/network/lib/network/ipv4/address.lua
+++ b/network/lib/network/ipv4/address.lua
@@ -4,6 +4,7 @@ local bit32 = require("bit32")
 local ipv4Adress = {}
 
 function ipv4Adress.fromString(val)
+    checkArg(1, val, 'string')
     local a, b, c, d = val:match("^(%d+)%.(%d+)%.(%d+)%.(%d+)$")
     if (not a or not b or not c or not d) then error("Not a IPv4", 2) end
     a = assert(tonumber(a))
@@ -18,6 +19,7 @@ function ipv4Adress.fromString(val)
 end
 
 function ipv4Adress.tostring(val)
+    checkArg(1, val, 'number')
     local a = bit32.extract(val, 24, 8)
     local b = bit32.extract(val, 16, 8)
     local c = bit32.extract(val, 8, 8)
@@ -29,6 +31,7 @@ end
 ---@param cidr string
 ---@return number address, number mask
 function ipv4Adress.fromCIDR(cidr)
+    checkArg(1, cidr, 'string')
     local address, mask = cidr:match("^(%d+%.%d+%.%d+%.%d+)/(%d+)$")
     mask = assert(tonumber(mask))
     return ipv4Adress.fromString(address), ipv4Adress.maskLenToMask(mask)
diff --git a/packages/manifest b/packages/manifest
index 6cba87b..bc876b1 100644
--- a/packages/manifest
+++ b/packages/manifest
@@ -255,7 +255,7 @@
 	["osinetwork"] = {
 		["manifestVersion"] = "1.0",
 		["package"] = "osinetwork",
-		["version"] = "2.3.1",
+		["version"] = "2.3.2",
 		["name"] = "OSI Network stack",
 		["repo"] = "tree/master/network",
 		["description"] = "A close to official rfc emulation of the OSI layers for OpenOS. Include Ethernet, ARP, ICMP, UDP. Also provide a luasocket libe librairy",
diff --git a/packages/osinetwork.tar b/packages/osinetwork.tar
index 06afa0d..6d9557d 100644
Binary files a/packages/osinetwork.tar and b/packages/osinetwork.tar differ
diff --git a/programs.cfg b/programs.cfg
index 6de1097..1fedddb 100644
--- a/programs.cfg
+++ b/programs.cfg
@@ -277,7 +277,7 @@
     note = "Are provided : ping, ifup, ifdown, arp, nc, netstat. Any one of theses tools may be moved to a separate package at any time",
     authors = "AR2000AR",
     repo = "tree/master/network",
-    version = "2.3.1"
+    version = "2.3.2"
   },
   ["dns_common"] = {
     files = {