diff --git a/MongoView/ExtendedJSON.swift b/MongoView/ExtendedJSON.swift
index 4fbb034..7679858 100644
--- a/MongoView/ExtendedJSON.swift
+++ b/MongoView/ExtendedJSON.swift
@@ -45,7 +45,8 @@ struct ExtendedJSON {
     }
     
     static func prettify(_ string: String) -> String? {
-        let command = "JSON.stringify(JSON.parse(`\(string)`), null, 4)"
+        context.setObject(string, forKeyedSubscript: "value" as NSString)
+        let command = "JSON.stringify(JSON.parse(value), null, 4)"
         return context.evaluateScript(command)?.toString()
     }