diff --git a/plugins/libimhex/include/hex/helpers/utils.hpp b/plugins/libimhex/include/hex/helpers/utils.hpp
index 0846f74ca..e02a49621 100644
--- a/plugins/libimhex/include/hex/helpers/utils.hpp
+++ b/plugins/libimhex/include/hex/helpers/utils.hpp
@@ -76,6 +76,38 @@ namespace hex {
 
 namespace hex {
 
+    std::string to_string(u128 value) {
+        char data[45] = { 0 };
+
+        u8 index = sizeof(data) - 2;
+        while (value != 0 && index != 0) {
+            data[index] = '0' + value % 10;
+            value /= 10;
+            index--;
+        }
+
+        return std::string(data + index + 1);
+    }
+
+    std::string to_string(s128 value) {
+        char data[45] = { 0 };
+
+        u128 unsignedValue = value < 0 ? -value : value;
+
+        u8 index = sizeof(data) - 2;
+        while (unsignedValue != 0 && index != 0) {
+            data[index] = '0' + unsignedValue % 10;
+            unsignedValue /= 10;
+            index--;
+        }
+
+        if (value < 0) {
+            data[index] = '-';
+            return std::string(data + index);
+        } else
+            return std::string(data + index + 1);
+    }
+
     template<typename ... Args>
     inline std::string format(const char *format, Args ... args) {
         ssize_t size = snprintf( nullptr, 0, format, args ... );
diff --git a/plugins/libimhex/source/lang/builtin_functions.cpp b/plugins/libimhex/source/lang/builtin_functions.cpp
index eab1c268b..5e6e74830 100644
--- a/plugins/libimhex/source/lang/builtin_functions.cpp
+++ b/plugins/libimhex/source/lang/builtin_functions.cpp
@@ -122,8 +122,8 @@ namespace hex::lang {
                         case Token::ValueType::Signed32Bit:     message += std::to_string(std::get<s32>(integerLiteral->getValue())); break;
                         case Token::ValueType::Unsigned64Bit:   message += std::to_string(std::get<u64>(integerLiteral->getValue())); break;
                         case Token::ValueType::Signed64Bit:     message += std::to_string(std::get<s64>(integerLiteral->getValue())); break;
-                        case Token::ValueType::Unsigned128Bit:  message += "A lot"; break; // TODO: Implement u128 to_string
-                        case Token::ValueType::Signed128Bit:    message += "A lot"; break; // TODO: Implement s128 to_string
+                        case Token::ValueType::Unsigned128Bit:  message += hex::to_string(std::get<u128>(integerLiteral->getValue())); break;
+                        case Token::ValueType::Signed128Bit:    message += hex::to_string(std::get<s128>(integerLiteral->getValue())); break;
                         case Token::ValueType::Float:           message += std::to_string(std::get<float>(integerLiteral->getValue())); break;
                         case Token::ValueType::Double:          message += std::to_string(std::get<double>(integerLiteral->getValue())); break;
                         case Token::ValueType::Boolean:         message += std::get<s32>(integerLiteral->getValue()) ? "true" : "false"; break;