diff --git a/pom.xml b/pom.xml
index a248902..6898161 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>org.retroachievements</groupId>
     <artifactId>api-kotlin</artifactId>
-    <version>1.0.8</version>
+    <version>1.0.9</version>
 
     <dependencyManagement>
         <dependencies>
diff --git a/src/main/kotlin/org/retroachivements/api/RetroInterface.kt b/src/main/kotlin/org/retroachivements/api/RetroInterface.kt
index ca73a03..9252e09 100644
--- a/src/main/kotlin/org/retroachivements/api/RetroInterface.kt
+++ b/src/main/kotlin/org/retroachivements/api/RetroInterface.kt
@@ -136,7 +136,7 @@ interface RetroInterface {
     @POST("/API/API_GetUserProgress.php")
     suspend fun getUserProgress(
         @Query("u") username: String,
-        @Query("i") gameId: Long
+        @Query("i") gameId: String
     ): NetworkResponse<GetUserProgress.Response, ErrorResponse>
 
     /**
diff --git a/src/main/kotlin/org/retroachivements/api/data/pojo/game/GetGameExtended.kt b/src/main/kotlin/org/retroachivements/api/data/pojo/game/GetGameExtended.kt
index 8b8eb8c..3096988 100644
--- a/src/main/kotlin/org/retroachivements/api/data/pojo/game/GetGameExtended.kt
+++ b/src/main/kotlin/org/retroachivements/api/data/pojo/game/GetGameExtended.kt
@@ -63,7 +63,7 @@ class GetGameExtended {
         val pointsTotal: Long,
 
         @SerializedName("GuideUrl")
-        val guideUrl: String,
+        val guideUrl: String?,
 
         @SerializedName("Updated")
         val updated: String,
@@ -72,7 +72,7 @@ class GetGameExtended {
         val consoleName: String,
 
         @SerializedName("ParentGameID")
-        val parentGameId: String,
+        val parentGameId: String?,
 
         @SerializedName("NumDistinctPlayers")
         val numDistinctPlayers: Long,
diff --git a/src/main/kotlin/org/retroachivements/api/data/pojo/game/GetGameInfoAndUserProgress.kt b/src/main/kotlin/org/retroachivements/api/data/pojo/game/GetGameInfoAndUserProgress.kt
index 169cea3..da4edb1 100644
--- a/src/main/kotlin/org/retroachivements/api/data/pojo/game/GetGameInfoAndUserProgress.kt
+++ b/src/main/kotlin/org/retroachivements/api/data/pojo/game/GetGameInfoAndUserProgress.kt
@@ -54,7 +54,7 @@ class GetGameInfoAndUserProgress {
         val playersTotal: Int,
 
         @SerializedName("GuideUrl")
-        val guideUrl: String,
+        val guideUrl: String?,
 
         @SerializedName("ConsoleName")
         val consoleName: String,
diff --git a/src/main/kotlin/org/retroachivements/api/data/pojo/ticket/GetMostRecentTickets.kt b/src/main/kotlin/org/retroachivements/api/data/pojo/ticket/GetMostRecentTickets.kt
index 2b8f77d..8acae07 100644
--- a/src/main/kotlin/org/retroachivements/api/data/pojo/ticket/GetMostRecentTickets.kt
+++ b/src/main/kotlin/org/retroachivements/api/data/pojo/ticket/GetMostRecentTickets.kt
@@ -70,10 +70,10 @@ class GetMostRecentTickets {
             val reportedBy: String,
 
             @SerializedName("ResolvedAt")
-            val resolvedAt: String,
+            val resolvedAt: String?,
 
             @SerializedName("ResolvedBy")
-            val resolvedBy: String,
+            val resolvedBy: String?,
 
             @SerializedName("ReportStateDescription")
             val reportStateDescription: String,
diff --git a/src/main/kotlin/org/retroachivements/api/data/pojo/ticket/GetTicketData.kt b/src/main/kotlin/org/retroachivements/api/data/pojo/ticket/GetTicketData.kt
index 81bfae4..28d7904 100644
--- a/src/main/kotlin/org/retroachivements/api/data/pojo/ticket/GetTicketData.kt
+++ b/src/main/kotlin/org/retroachivements/api/data/pojo/ticket/GetTicketData.kt
@@ -60,10 +60,10 @@ class GetTicketData {
         val reportedBy: String,
 
         @SerializedName("ResolvedAt")
-        val resolvedAt: String,
+        val resolvedAt: String?,
 
         @SerializedName("ResolvedBy")
-        val resolvedBy: String,
+        val resolvedBy: String?,
 
         @SerializedName("ReportStateDescription")
         val reportStateDescription: String,