diff --git a/roulette.py b/roulette.py
index 6bd61b1..90a4b25 100644
--- a/roulette.py
+++ b/roulette.py
@@ -73,7 +73,7 @@ def get_player(player_id):
     cur = con.cursor()
 
     cur.execute("""select id,firstname,name,ban_end from players
-            where id=(?)""", [player_id])
+            where id=%i"""% [player_id])
 
     row = cur.fetchone()
     con.close()
@@ -88,7 +88,7 @@ def get_player_from_ip(ip):
         machines.id,machines.ip,players.ban_end
         from players
         inner join machines on players.id=machines.player_id
-        where machines.ip=(?)""", [ip])
+        where machines.ip=%s"""% [ip])
 
     row = cur.fetchone()
     con.close()
@@ -109,7 +109,7 @@ def get_player_from_full_name(firstname, name):
         machines.id,machines.ip,players.ban_end
         from players
         inner join machines on players.id=machines.player_id
-        where players.firstname=(?) and players.name=(?)""", [firstname, name])
+        where players.firstname=%s and players.name=%s"""% [firstname, name])
 
     row = cur.fetchone()
     con.close()
@@ -125,7 +125,7 @@ def is_banned(user_id):
     con = connect_sql()
     cur = con.cursor()
 
-    cur.execute("""select ban_end from players where id=(?)""", [user_id])
+    cur.execute("""select ban_end from players where id=%i"""% [user_id])
 
     ban_end = cur.fetchone()[0]
     con.close()
@@ -153,7 +153,7 @@ def get_players_not_banned():
     cur = con.cursor()
 
     cur.execute("""select id,firstname,name from players
-            where (?) > ban_end """, [time()])
+            where %f > ban_end """% [time()])
 
     rows = cur.fetchall()
     con.close()
@@ -201,7 +201,7 @@ def ban(player_id, target_id, success):
     cur = con.cursor()
 
     cur.execute("""select id,ban_end from players
-            where id=(?)""", [banned_player['id']])
+            where id=%i"""% [banned_player['id']])
 
     con.commit()
     con.close()
@@ -211,8 +211,8 @@ def ban(player_id, target_id, success):
     ban_end = cur.fetchone()[0]
     ban_end = time() + BAN_DURATION
 
-    cur.execute("""update players set ban_end=(?)
-            where id=(?)""", [ban_end, banned_player['id']])
+    cur.execute("""update players set ban_end=%f
+            where id=%i"""% [ban_end, banned_player['id']])
 
 
     con.commit()
@@ -220,7 +220,7 @@ def ban(player_id, target_id, success):
     con = connect_sql()
     cur = con.cursor()
     cur.execute("""insert into bans (player_id,target_id,success,time)
-            values (?,?,?,?)""", [player['id'], target['id'], \
+            values %i,%i,%i,%f"""% [player['id'], target['id'], \
                     success and 1 or 0, time()])
     con.commit()
     con.close()
@@ -230,8 +230,8 @@ def unban(player_id):
     con = connect_sql()
     cur = con.cursor()
 
-    cur.execute("""update players set ban_end=(?)
-            where id=(?)""", [time() - BAN_DURATION, player_id])
+    cur.execute("""update players set ban_end=%f
+            where id=%i"""% [time() - BAN_DURATION, player_id])
 
     con.commit()
     con.close()
@@ -241,9 +241,7 @@ def get_bans(player_id):
     cur = con.cursor()
 
     # Bannissements concernant le joueur :
-    cur.execute("""select player_id,target_id,success,time from bans
-            where target_id=(?)
-            or player_id=(?)""", [player_id, player_id])
+    cur.execute("""select player_id,target_id,success,time from bans where target_id=%i or player_id=%i""" % (player_id, player_id))
 
     rows = cur.fetchall()
     con.close()
@@ -312,7 +310,7 @@ def banned_ip():
 
     cur.execute("""select machines.ip from players
         inner join machines on players.id=machines.player_id
-        where players.ban_end>(?)""", [time()])
+        where players.ban_end>%f"""% [time()])
 
     rows = cur.fetchall()
     con.close()