diff --git a/lib/types.js b/lib/types.js
index f79e8cbb..1594e71d 100644
--- a/lib/types.js
+++ b/lib/types.js
@@ -1089,9 +1089,7 @@ class StringType extends PrimitiveType {
   }
 
   random () {
-    return RANDOM.nextString(
-      Math.floor(-Math.log(RANDOM.nextFloat()) * 16) + 1
-    );
+    return RANDOM.nextString(RANDOM.nextInt(32));
   }
 }