diff --git a/inc/db.coffee b/inc/db.coffee
index 19e5597..982ee6f 100644
--- a/inc/db.coffee
+++ b/inc/db.coffee
@@ -160,34 +160,59 @@ FFTCGDB::addDeck = (user, deckCards) ->
 
       else
         stmt.finalize()
-        # deck added successfully
-        deckID = @lastID
+        # deck added successfully, now add cards
+        that.modDeck(@lastID, deckCards)
+          .then (deckID) ->
+            resolve deckID
+          .catch (error) ->
+            reject error
+
+FFTCGDB::modDeck = (deckID, deckCards) ->
+  that = @
+
+  new Promise (resolve, reject) ->
+    # delete old deck cards
+    stmt = that.db.prepare 'DELETE FROM decks_cards WHERE deck = ?'
+    stmt.run [deckID], (err) ->
+      stmt.finalize()
+      if err
+        FFTCGLOG.log "modDeck: DB fail '#{err.code}' for deck '#{deckID}'"
+        reject 'db'
+      else
         stmt = that.db.prepare 'INSERT INTO decks_cards (deck, card, quant) VALUES (?, ?, ?)'
-        # add individual cards
+        # add new cards
         that.db.parallelize ->
           # needs to be done in several queries
           promiseCount = deckCards.length
           deckCards.forEach (card) ->
             stmt.run [deckID, card.id, card.quant], (err) ->
               if err
-                FFTCGLOG.log "addDeck: DB fail '#{err.code}' for card '#{deckID}', '#{card.id}', '#{card.quant}'"
+                FFTCGLOG.log "modDeck: DB fail '#{err.code}' for card '#{deckID}', '#{card.id}', '#{card.quant}'"
                 stmt.finalize()
                 reject 'db'
               else
                 # check if all queries are done
                 promiseCount -= 1
                 if promiseCount == 0
-                  FFTCGLOG.log "addDeck: OK '#{user}'"
+                  FFTCGLOG.log "modDeck: OK '#{deckID}'"
                   stmt.finalize()
                   resolve deckID
 
-FFTCGDB::delDeck = (deck) ->
+
+FFTCGDB::delDeck = (deckID) ->
   that = @
 
   new Promise (resolve, reject) ->
-    # try creating row in decks table
+    # try deleting correct row in decks table
     stmt = that.db.prepare 'DELETE FROM decks WHERE deck = ?'
-    stmt.run [deck], (err)
+    stmt.run [deckID], (err) ->
+      stmt.finalize()
+      if err
+        FFTCGLOG.log "delDeck: DB fail '#{err.code}' for deck '#{deckID}'"
+        reject 'db'
+      else
+        FFTCGLOG.log "delDeck: OK '#{deckID}'"
+        resolve deckID
 
 
 module.exports = FFTCGDB