diff --git a/lib/paiement_cic.rb b/lib/paiement_cic.rb
index 8dbf7b1..3dc5766 100644
--- a/lib/paiement_cic.rb
+++ b/lib/paiement_cic.rb
@@ -21,16 +21,16 @@ class PaiementCic
 
   @@hmac_key = "ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ" # clé extraite grâce à extract2HmacSha1.html fourni par le Crédit Mutuel
   cattr_accessor :hmac_key
-  
+
   @@target_url = "https://paiement.creditmutuel.fr/test/paiement.cgi" # "https://ssl.paiement.cic-banques.fr/paiement.cgi"
   cattr_accessor :target_url
-  
+
   @@tpe = "123456"
   cattr_accessor :tpe
-  
+
   @@societe = "masociete"
   cattr_accessor :societe
-  
+
   @@url_ok = ""
   cattr_accessor :url_ok
 
@@ -63,52 +63,52 @@ class PaiementCic
 
     hmac_key.valid_hmac?(mac_string, params['MAC'])
   end
-	
+
   # Check if the HMAC matches the HMAC of the data string
-	def valid_hmac?(mac_string, sent_mac)
-		computeHMACSHA1(mac_string) == sent_mac.downcase
-	end
-	
+  def valid_hmac?(mac_string, sent_mac)
+    computeHMACSHA1(mac_string) == sent_mac.downcase
+  end
+
   # Return the HMAC for a data string
-	def computeHMACSHA1(data)
-		hmac_sha1(usable_key(self), data).downcase
-	end
-  
+  def computeHMACSHA1(data)
+    hmac_sha1(usable_key(self), data).downcase
+  end
+
   def hmac_sha1(key, data)
-		length = 64
+    length = 64
 
-		if (key.length > length) 
-			key = [Digest::SHA1.hexdigest(key)].pack("H*")
-		end
+    if (key.length > length)
+      key = [Digest::SHA1.hexdigest(key)].pack("H*")
+    end
 
-		key  = key.ljust(length, 0.chr)
-		ipad = ''.ljust(length, 54.chr)
-		opad = ''.ljust(length, 92.chr)
+    key  = key.ljust(length, 0.chr)
+    ipad = ''.ljust(length, 54.chr)
+    opad = ''.ljust(length, 92.chr)
 
-		k_ipad = key ^ ipad
-		k_opad = key ^ opad
+    k_ipad = key ^ ipad
+    k_opad = key ^ opad
 
-		#Digest::SHA1.hexdigest(k_opad + [Digest::SHA1.hexdigest(k_ipad + sData)].pack("H*"))
-	  OpenSSL::HMAC.hexdigest(OpenSSL::Digest::Digest.new("sha1"), key, data)
-	end
+    #Digest::SHA1.hexdigest(k_opad + [Digest::SHA1.hexdigest(k_ipad + sData)].pack("H*"))
+    OpenSSL::HMAC.hexdigest(OpenSSL::Digest::Digest.new("sha1"), key, data)
+  end
 
   private
-	# Return the key to be used in the hmac function
-	def usable_key(payement)
+  # Return the key to be used in the hmac function
+  def usable_key(payement)
 
-		hex_string_key  = payement.hmac_key[0..37]
-		hex_final   = payement.hmac_key[38..40] + "00";
+    hex_string_key  = payement.hmac_key[0..37]
+    hex_final   = payement.hmac_key[38..40] + "00";
 
-		cca0 = hex_final[0].ord
+    cca0 = hex_final[0].ord
 
-		if cca0 > 70 && cca0 < 97
-			hex_string_key += (cca0 - 23).chr + hex_final[1..2]
-		elsif hex_final[1..2] == "M" 
-			hex_string_key += hex_final[0..1] + "0" 
-		else 
-			hex_string_key += hex_final[0..2]
-		end
+    if cca0 > 70 && cca0 < 97
+      hex_string_key += (cca0 - 23).chr + hex_final[1..2]
+    elsif hex_final[1..2] == "M"
+      hex_string_key += hex_final[0..1] + "0"
+    else
+      hex_string_key += hex_final[0..2]
+    end
 
-		[hex_string_key].pack("H*")
-	end
+    [hex_string_key].pack("H*")
+  end
 end
diff --git a/lib/paiement_cic/form_helper.rb b/lib/paiement_cic/form_helper.rb
index 32b768c..429a433 100644
--- a/lib/paiement_cic/form_helper.rb
+++ b/lib/paiement_cic/form_helper.rb
@@ -7,11 +7,11 @@ module PaiementCic::FormHelper
     sDate = Time.now.strftime("%d/%m/%Y:%H:%M:%S")
     chaine = [oMac.tpe, sDate, oa["montant"], oa["reference"].to_s, oa["texte-libre"], oMac.version, "FR", oMac.societe, "", "", "", "", "", "", "", "", "", "", ""].join("*")
     chaineMAC = oMac.computeHMACSHA1(chaine)
-    
+
     url_retour      = options[:url_retour] || bank_callback_order_transactions_url
     url_retour_ok   = options[:url_retour_ok] || bank_callback_order_transactions_url(order)
     url_retour_err  = options[:url_retour_err] || bank_err_order_transaction_url(order)
-    
+
     html = '
         <input type="hidden" name="version"           id="version"        value="' + oa["version"] + '" />
         <input type="hidden" name="TPE"               id="TPE"            value="' + oa["TPE"] + '" />