diff --git a/.gitignore b/.gitignore
index e934adf..fa80e3a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 cache/
+wallart-server
diff --git a/cmd/wallart-server/main.go b/cmd/wallart-server/main.go
index 79444df..5095760 100644
--- a/cmd/wallart-server/main.go
+++ b/cmd/wallart-server/main.go
@@ -35,7 +35,12 @@ func handleUpload(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	if pixil.Width != 8 || pixil.Height != 8 {
+	if err := pixil.Parse(); err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	if pixil.width != 8 || pixil.height != 8 {
 		http.Error(w, "Invalid image size", http.StatusBadRequest)
 		return
 	}
@@ -106,13 +111,13 @@ func handleUpload(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-  log.Println("New image successfully uploaded")
+	log.Println("New image successfully uploaded")
 }
 
 func logRequestHandler(h http.Handler) http.Handler {
 	fn := func(w http.ResponseWriter, r *http.Request) {
 		log.Printf("%s %s %s", r.RemoteAddr, r.Method, r.URL)
-    h.ServeHTTP(w, r)
+		h.ServeHTTP(w, r)
 	}
 	return http.HandlerFunc(fn)
 }
diff --git a/cmd/wallart-server/pixil.go b/cmd/wallart-server/pixil.go
index 3e3c318..e8115b3 100644
--- a/cmd/wallart-server/pixil.go
+++ b/cmd/wallart-server/pixil.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"encoding/base64"
+	"strconv"
 	"strings"
 )
 
@@ -11,9 +12,23 @@ type PixilFrame struct {
 	Preview string `json:"preview"`
 }
 type Pixil struct {
-	Width  uint         `json:"width"`
-	Height uint         `json:"height"`
-	Frames []PixilFrame `json:"frames"`
+	width        int
+	height       int
+	WidthString  string       `json:"width"`
+	HeightString string       `json:"height"`
+	Frames       []PixilFrame `json:"frames"`
+}
+
+func (p *Pixil) Parse() error {
+	var err error
+
+	p.width, err = strconv.Atoi(p.WidthString)
+	if err != nil {
+		return err
+	}
+
+	p.height, err = strconv.Atoi(p.HeightString)
+	return err
 }
 
 func (frame *PixilFrame) GetPreview() []byte {