diff --git a/nise-backend/src/main/kotlin/com/nisemoe/nise/osu/OsuApi.kt b/nise-backend/src/main/kotlin/com/nisemoe/nise/osu/OsuApi.kt
index af95d33..4112706 100644
--- a/nise-backend/src/main/kotlin/com/nisemoe/nise/osu/OsuApi.kt
+++ b/nise-backend/src/main/kotlin/com/nisemoe/nise/osu/OsuApi.kt
@@ -70,14 +70,15 @@ class OsuApi(
         .version(HttpClient.Version.HTTP_2)
         .build()
 
-    fun doRequest(url: String, queryParams: Map<String, Any>, authorized: Boolean = true, appendToUrl: String? = null): HttpResponse<String>? {
+    fun doRequest(url: String, queryParams: Map<String, Any?>, authorized: Boolean = true, appendToUrl: String? = null): HttpResponse<String>? {
         var accessToken: TokenService.AccessTokenResponse? = null
         if(authorized)
             accessToken = this.tokenService.getAccessToken()
 
         val uriBuilder = StringBuilder(url)
         queryParams.forEach { (key, value) ->
-            uriBuilder.append("$key=$value&")
+            if (value != null)
+                uriBuilder.append("$key=$value&")
         }
 
         if(appendToUrl != null)