diff --git a/src/config.json b/src/config.json
index b71a470b..ed5d8e37 100644
--- a/src/config.json
+++ b/src/config.json
@@ -34,10 +34,10 @@
     "safe": false,
     "threads": null,
     "algo-perf": {
-        "cn":      1000,
-        "cn-fast": 2000,
-        "cn-lite": 2000,
-        "cn-heavy": 700
+        "cn":      1000.0,
+        "cn-fast": 2000.0,
+        "cn-lite": 2000.0,
+        "cn-heavy": 700.0
     },
     "user-agent": null,
     "watch": false