diff --git a/src/coders/json.cpp b/src/coders/json.cpp
index 971e7cc1..29b9201c 100644
--- a/src/coders/json.cpp
+++ b/src/coders/json.cpp
@@ -2,6 +2,7 @@
 
 #include <math.h>
 #include <sstream>
+#include <iomanip>
 #include <memory>
 
 #include "commons.h"
@@ -70,6 +71,8 @@ void stringify(Value* value,
     } else if (value->type == valtype::boolean) {
         ss << (value->value.boolean ? "true" : "false");
     } else if (value->type == valtype::number) {
+        ss << std::fixed;
+        ss << std::setprecision(15);
         ss << value->value.decimal;
     } else if (value->type == valtype::integer) {
         ss << value->value.integer;
diff --git a/src/coders/toml.cpp b/src/coders/toml.cpp
index 3f5ee332..4981eaa6 100644
--- a/src/coders/toml.cpp
+++ b/src/coders/toml.cpp
@@ -3,6 +3,7 @@
 
 #include <math.h>
 #include <iostream>
+#include <iomanip>
 #include <sstream>
 #include <assert.h>
 
@@ -96,7 +97,10 @@ std::string Wrapper::write() const {
                     break;
                 case fieldtype::ftint: ss << *((int*)field->ptr); break;
                 case fieldtype::ftuint: ss << *((uint*)field->ptr); break;
-                case fieldtype::ftfloat: ss << *((float*)field->ptr); break;
+                case fieldtype::ftfloat: 
+                    ss << std::fixed;
+                    ss << std::setprecision(15);
+                    ss << *((float*)field->ptr); break;
                 case fieldtype::ftstring: 
                     ss << escape_string(*((const string*)field->ptr)); 
                     break;