diff --git a/cfg/yolov3-voc.cfg b/cfg/yolov3-voc.cfg
index 61ccf80ed9ae56ab848e634341236c56b0a6fa5a..08bdda6f633b6dd4c4b804f1de592e351f5e84fb 100644
--- a/cfg/yolov3-voc.cfg
+++ b/cfg/yolov3-voc.cfg
@@ -608,7 +608,7 @@ activation=linear
 [yolo]
 mask = 6,7,8
 anchors = 10,13,  16,30,  33,23,  30,61,  62,45,  59,119,  116,90,  156,198,  373,326
-classes=20
+classes=1
 num=9
 jitter=.3
 ignore_thresh = .5
@@ -692,7 +692,7 @@ activation=linear
 [yolo]
 mask = 3,4,5
 anchors = 10,13,  16,30,  33,23,  30,61,  62,45,  59,119,  116,90,  156,198,  373,326
-classes=20
+classes=1
 num=9
 jitter=.3
 ignore_thresh = .5
@@ -776,7 +776,7 @@ activation=linear
 [yolo]
 mask = 0,1,2
 anchors = 10,13,  16,30,  33,23,  30,61,  62,45,  59,119,  116,90,  156,198,  373,326
-classes=20
+classes=1
 num=9
 jitter=.3
 ignore_thresh = .5