diff --git a/src/clj/pmagnus/elprice/web/controllers/prices.clj b/src/clj/pmagnus/elprice/web/controllers/prices.clj
index 008d089..bfbb558 100644
--- a/src/clj/pmagnus/elprice/web/controllers/prices.clj
+++ b/src/clj/pmagnus/elprice/web/controllers/prices.clj
@@ -3,7 +3,7 @@
    [clojure.data.json :as json]
    [clojure.tools.logging :as log])
   (:import
-   [java.net URI]
+   [java.net URI URLEncoder]
    [java.net.http HttpClient HttpRequest HttpResponse$BodyHandlers]
    [java.time LocalDate ZoneId]
    [java.time.format DateTimeFormatter]
@@ -19,7 +19,7 @@
   (str "https://api.energidataservice.dk/dataset/DayAheadPrices"
        "?start=" start-date
        "&end=" end-date
-       "&filter=" (json/write-str {"PriceArea" ["DK1" "DK2"]})
+       "&filter=" (URLEncoder/encode (json/write-str {"PriceArea" ["DK1" "DK2"]}) "UTF-8")
        "&sort=TimeDK%20asc"
        "&limit=200"))