diff --git a/src/serra/root.go b/src/serra/root.go
index 8de0dee..918e427 100644
--- a/src/serra/root.go
+++ b/src/serra/root.go
@@ -90,7 +90,7 @@ func Cards() {
 	cards, _ := coll.storage_find(filter, sort)
 
 	for _, card := range cards {
-		LogMessage(fmt.Sprintf("* %dx %s%s%s (%s/%d) %s%.2f EUR%s", card.SerraCount, Purple, card.Name, Reset, card.Set, card.CollectorNumber, Yellow, card.Prices.Eur, Reset), "normal")
+		LogMessage(fmt.Sprintf("* %dx %s%s%s (%s/%s) %s%.2f EUR%s", card.SerraCount, Purple, card.Name, Reset, card.Set, card.CollectorNumber, Yellow, card.Prices.Eur, Reset), "normal")
 	}
 }
 
@@ -144,7 +144,7 @@ func ShowSet(setname string) error {
 
 	client := storage_connect()
 	coll := &Collection{client.Database("serra").Collection("cards")}
-	storage_disconnect(client)
+	defer storage_disconnect(client)
 
 	// fetch all cards in set
 	cards, err := coll.storage_find(bson.D{{"set", setname}}, bson.D{{"prices.eur", -1}})
@@ -181,7 +181,7 @@ func ShowSet(setname string) error {
 	LogMessage(fmt.Sprintf("\nMost valuable cards"), "purple")
 	for i := 0; i < 10; i++ {
 		card := cards[i]
-		fmt.Printf("%dx %s (%s/%d) %.2f EUR\n", card.SerraCount, card.Name, sets[0].Code, card.CollectorNumber, card.Prices.Eur)
+		fmt.Printf("%dx %s (%s/%s) %.2f EUR\n", card.SerraCount, card.Name, sets[0].Code, card.CollectorNumber, card.Prices.Eur)
 	}
 
 	return nil
diff --git a/src/serra/scryfall.go b/src/serra/scryfall.go
index fdb6e01..0b4f64d 100644
--- a/src/serra/scryfall.go
+++ b/src/serra/scryfall.go
@@ -26,7 +26,7 @@ type Card struct {
 	BorderColor     string   `json:"border_color"`
 	CardBackID      string   `json:"card_back_id"`
 	Cmc             int64    `json:"cmc"`
-	CollectorNumber int64    `json:"collector_number,string"`
+	CollectorNumber string   `json:"collector_number"`
 	ColorIdentity   []string `json:"color_identity"`
 	Colors          []string `json:"colors"`
 	Digital         bool     `json:"digital"`
diff --git a/add.fish b/utils/add-card-wrapper.fish
similarity index 100%
rename from add.fish
rename to utils/add-card-wrapper.fish
diff --git a/utils/migrations.py b/utils/migrations.py
new file mode 100644
index 0000000..7a54cd0
--- /dev/null
+++ b/utils/migrations.py
@@ -0,0 +1,19 @@
+from pymongo import MongoClient
+import os
+import pymongo
+
+CONNECTION_STRING = os.getenv("MONGODB_URI")
+client = MongoClient(CONNECTION_STRING+'/admin')
+
+
+# Create a new collection
+collection = client["serra"]["cards"]
+
+cards=collection.find()
+
+for c in cards:
+    print(c["_id"])
+    f = { '_id': c["_id"] }
+    u = { "$set": { 'collectornumber': str(c["collectornumber"])} }
+    print("%s %s %s" % (f, u, c["collectornumber"]))
+    collection.update_one(f, u)