diff --git a/src/lib_json/json_writer.cpp b/src/lib_json/json_writer.cpp
index 9747a7a..a07fbc9 100644
--- a/src/lib_json/json_writer.cpp
+++ b/src/lib_json/json_writer.cpp
@@ -143,7 +143,7 @@ std::string valueToString(double value, bool useSpecialFloats, unsigned int prec
   int len = -1;
 
   std::stringstream value_ss;
-  value_ss << std::setprecision( 15 ) << value;
+  value_ss << std::setprecision( 17 ) << value;
   std::string value_str = value_ss.str();
 
   // Print into the buffer. We need not request the alternative representation