diff --git a/addons/sourcemod/plugins/optional/l4d2_gameinfo_sync.smx b/addons/sourcemod/plugins/optional/l4d2_gameinfo_sync.smx
index 7cafa30b3..f15bad459 100644
Binary files a/addons/sourcemod/plugins/optional/l4d2_gameinfo_sync.smx and b/addons/sourcemod/plugins/optional/l4d2_gameinfo_sync.smx differ
diff --git a/addons/sourcemod/scripting/l4d2_gameinfo_sync.sp b/addons/sourcemod/scripting/l4d2_gameinfo_sync.sp
index acfed37dd..748fffefc 100644
--- a/addons/sourcemod/scripting/l4d2_gameinfo_sync.sp
+++ b/addons/sourcemod/scripting/l4d2_gameinfo_sync.sp
@@ -27,7 +27,8 @@ public Plugin myinfo =
 ConVar
     g_hUrl,
     g_hSecretKey,
-    g_hConfigurationName;
+    g_hConfigurationName,
+    g_hVsBossBuffer;
 
 char g_sConfigurationName[64];
 
@@ -42,6 +43,8 @@ float g_fSurvivorProgress[MAXPLAYERS + 1];
 
 public void OnPluginStart()
 {
+    g_hVsBossBuffer = FindConVar("versus_boss_buffer");
+
     g_hUrl = CreateConVar("gameinfo_url", "", "Game Info API URL", FCVAR_PROTECTED);
     g_hSecretKey = CreateConVar("gameinfo_secret", "", "Game Info API Secret Key", FCVAR_PROTECTED);
 
@@ -220,16 +223,13 @@ void SendScoreboard()
     bool isInReady = IsInReady();
     int bonus = SMPlus_GetHealthBonus() + SMPlus_GetDamageBonus() + SMPlus_GetPillsBonus();
     int maxBonus = SMPlus_GetMaxHealthBonus() + SMPlus_GetMaxDamageBonus() + SMPlus_GetMaxPillsBonus();
-    int currentProgressPoints = isInReady ? 0 : L4D_GetTeamScore(flipped ? 2 : 1);
-    int maxChapterProgressPoints = L4D_GetVersusMaxCompletionScore();
-    float currentProgress = (isInReady || maxChapterProgressPoints == 0) ? 0.0 : (float(currentProgressPoints) / float(maxChapterProgressPoints));
 
     command.SetInt("survivorScore", L4D2Direct_GetVSCampaignScore(flipped ? 1 : 0) + L4D_GetTeamScore(flipped ? 2 : 1));
     command.SetInt("infectedScore", L4D2Direct_GetVSCampaignScore(flipped ? 0 : 1) + L4D_GetTeamScore(flipped ? 1 : 2));
     command.SetInt("bonus", isInReady ? maxBonus : bonus);
     command.SetInt("maxBonus", maxBonus);
-    command.SetFloat("currentProgress", currentProgress);
-    command.SetInt("currentProgressPoints", currentProgressPoints);
+    command.SetFloat("currentProgress", isInReady ? 0.0 : (GetCurrentProgress() / 100.0));
+    command.SetInt("currentProgressPoints", isInReady ? 0 : L4D_GetTeamScore(flipped ? 2 : 1));
 
     HTTPRequest request = BuildHTTPRequest("/api/game-info/scoreboard");
 
@@ -385,6 +385,36 @@ float GetSurvivorProgress(int client)
     return 0.0;
 }
 
+int GetCurrentProgress()
+{
+	return RoundToNearest(GetBossProximity() * 100.0);
+}
+
+float GetBossProximity()
+{
+	float proximity = GetMaxSurvivorCompletion() + g_hVsBossBuffer.FloatValue / L4D2Direct_GetMapMaxFlowDistance();
+
+	return (proximity > 1.0) ? 1.0 : proximity;
+}
+
+float GetMaxSurvivorCompletion()
+{
+	float flow = 0.0, tmp_flow = 0.0, origin[3];
+	Address pNavArea;
+	for (int i = 1; i <= MaxClients; i++) {
+		if (IsClientInGame(i) && GetClientTeam(i) == L4D2_TEAM_SURVIVOR) {
+			GetClientAbsOrigin(i, origin);
+			pNavArea = L4D2Direct_GetTerrorNavArea(origin);
+			if (pNavArea != Address_Null) {
+				tmp_flow = L4D2Direct_GetTerrorNavAreaFlow(pNavArea);
+				flow = (flow > tmp_flow) ? flow : tmp_flow;
+			}
+		}
+	}
+
+	return (flow / L4D2Direct_GetMapMaxFlowDistance());
+}
+
 float Max(float a, float b) {
     return (a > b) ? a : b;
 }