diff --git a/training/imagenet/config/ds_config.json b/training/imagenet/config/ds_config.json
index d786b90e6..bab0ea4c2 100644
--- a/training/imagenet/config/ds_config.json
+++ b/training/imagenet/config/ds_config.json
@@ -22,7 +22,7 @@
     "zero_allow_untested_optimizer": true,
     "fp16": {
 	"enabled": false
-    }
+    },
     "gradient_clipping": 0,
     "prescale_gradients": false,
     "cuda_visible_devices": 0,
diff --git a/training/imagenet/config/ds_fp16_config.json b/training/imagenet/config/ds_fp16_config.json
index 60e28fc8b..646a5d650 100644
--- a/training/imagenet/config/ds_fp16_config.json
+++ b/training/imagenet/config/ds_fp16_config.json
@@ -23,7 +23,7 @@
     "fp16": {
 	"enabled": true,
 	"auto_cast": true
-    }
+    },
     "gradient_clipping": 0,
     "prescale_gradients": false,
     "cuda_visible_devices": 0,
diff --git a/training/imagenet/config/ds_fp16_z1_config.json b/training/imagenet/config/ds_fp16_z1_config.json
index b3c0d1c68..ae34e5d57 100644
--- a/training/imagenet/config/ds_fp16_z1_config.json
+++ b/training/imagenet/config/ds_fp16_z1_config.json
@@ -23,7 +23,7 @@
     "fp16": {
 	"enabled": true,
 	"auto_cast": true
-    }
+    },
     "gradient_clipping": 0,
     "prescale_gradients": false,
     "cuda_visible_devices": 0,