diff --git a/CMakeLists.txt b/CMakeLists.txt
index d02b5bbe..9dfc06d6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 2.8.11)
 project(recodex-worker)
-set(RECODEX_VERSION 1.6.4)
+set(RECODEX_VERSION 1.7.1)
 enable_testing()
 
 # Hack for old CentOS and new GCC with uncompatible ABI
diff --git a/judges/judge_passthrough/main.cpp b/judges/judge_passthrough/main.cpp
index 94c1585f..93e30b3f 100644
--- a/judges/judge_passthrough/main.cpp
+++ b/judges/judge_passthrough/main.cpp
@@ -20,11 +20,105 @@
 using namespace std;
 
 
+/**
+ * Class taken from a snippet
+ * https://gist.github.com/tomykaira/f0fd86b6c73063283afe550bc5d77594
+ */
+class Base64 {
+public:
+	static std::string Encode(const std::string data) {
+		static constexpr char sEncodingTable[] = {
+			'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
+			'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
+			'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
+			'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
+			'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
+			'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
+			'w', 'x', 'y', 'z', '0', '1', '2', '3',
+			'4', '5', '6', '7', '8', '9', '+', '/'
+		};
+
+		size_t in_len = data.size();
+		size_t out_len = 4 * ((in_len + 2) / 3);
+		std::string ret(out_len, '\0');
+		size_t i;
+		char *p = const_cast<char*>(ret.c_str());
+
+		for (i = 0; i < in_len - 2; i += 3) {
+			*p++ = sEncodingTable[(data[i] >> 2) & 0x3F];
+			*p++ = sEncodingTable[((data[i] & 0x3) << 4) | ((int) (data[i + 1] & 0xF0) >> 4)];
+			*p++ = sEncodingTable[((data[i + 1] & 0xF) << 2) | ((int) (data[i + 2] & 0xC0) >> 6)];
+			*p++ = sEncodingTable[data[i + 2] & 0x3F];
+		}
+		if (i < in_len) {
+			*p++ = sEncodingTable[(data[i] >> 2) & 0x3F];
+			if (i == (in_len - 1)) {
+				*p++ = sEncodingTable[((data[i] & 0x3) << 4)];
+				*p++ = '=';
+			}
+			else {
+				*p++ = sEncodingTable[((data[i] & 0x3) << 4) | ((int) (data[i + 1] & 0xF0) >> 4)];
+				*p++ = sEncodingTable[((data[i + 1] & 0xF) << 2)];
+			}
+			*p++ = '=';
+		}
+
+		return ret;
+	}
+
+	static std::string Decode(const std::string& input, std::string& out) {
+		static constexpr unsigned char kDecodingTable[] = {
+			64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
+			64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
+			64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 62, 64, 64, 64, 63,
+			52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 64, 64, 64, 64, 64, 64,
+			64,	0,	1,	2,	3,	4,	5,	6,	7,	8,	9, 10, 11, 12, 13, 14,
+			15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 64, 64, 64, 64, 64,
+			64, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
+			41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 64, 64, 64, 64, 64,
+			64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
+			64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
+			64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
+			64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
+			64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
+			64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
+			64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
+			64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64
+		};
+
+		size_t in_len = input.size();
+		if (in_len % 4 != 0) return "Input data size is not a multiple of 4";
+
+		size_t out_len = in_len / 4 * 3;
+		if (input[in_len - 1] == '=') out_len--;
+		if (input[in_len - 2] == '=') out_len--;
+
+		out.resize(out_len);
+
+		for (size_t i = 0, j = 0; i < in_len;) {
+			uint32_t a = input[i] == '=' ? 0 & i++ : kDecodingTable[static_cast<int>(input[i++])];
+			uint32_t b = input[i] == '=' ? 0 & i++ : kDecodingTable[static_cast<int>(input[i++])];
+			uint32_t c = input[i] == '=' ? 0 & i++ : kDecodingTable[static_cast<int>(input[i++])];
+			uint32_t d = input[i] == '=' ? 0 & i++ : kDecodingTable[static_cast<int>(input[i++])];
+
+			uint32_t triple = (a << 3 * 6) + (b << 2 * 6) + (c << 1 * 6) + (d << 0 * 6);
+
+			if (j < out_len) out[j++] = (triple >> 2 * 8) & 0xFF;
+			if (j < out_len) out[j++] = (triple >> 1 * 8) & 0xFF;
+			if (j < out_len) out[j++] = (triple >> 0 * 8) & 0xFF;
+		}
+
+		return "";
+	}
+
+};
+
+
 /*
  * Application entry point.
  */
-int main(int argc, char **argv) {
-
+int main(int argc, char **argv)
+{
 	// Check amount of program arguments.
 	if (argc != 3) {
 		cerr << "Wrong amount of arguments." << endl;
@@ -35,15 +129,36 @@ int main(int argc, char **argv) {
 		ifstream inputFile(argv[1]);
 		
 		// Get the first line which holds the exit code
-		std::string firstLine;
-		getline(inputFile, firstLine);
-		int exitCode = stoi(firstLine);
-		if (exitCode < 0 || exitCode > 255) {
-			throw runtime_error("Invalid exit code value.");
+		std::string line, decoded, result;
+		int exitCode = 0;
+		if (getline(inputFile, line)) {
+			exitCode = stoi(line);
+			if (exitCode < 0 || exitCode > 255) {
+				throw runtime_error("Invalid exit code value.");
+			}
+		} else {
+			throw runtime_error("No exit code value specified.");
+		}
+
+		// Get the stdout and decode it
+		if (getline(inputFile, line)) {
+			result = Base64::Decode(line, decoded);
+			if (!result.empty()) {
+				throw runtime_error(result);
+			}
+			cout << decoded;
+		}
+
+		// Get the stderr and decode it
+		if (getline(inputFile, line)) {
+			result = Base64::Decode(line, decoded);
+			if (!result.empty()) {
+				throw runtime_error(result);
+			}
+			cerr << decoded;
 		}
 
 		// Copy the rest of the input file to the output...
-		cout << inputFile.rdbuf();
 		inputFile.close();
 
 		return exitCode;
diff --git a/judges/judge_passthrough/recodex-data-only-wrapper.sh b/judges/judge_passthrough/recodex-data-only-wrapper.sh
index 8f857708..2669a809 100755
--- a/judges/judge_passthrough/recodex-data-only-wrapper.sh
+++ b/judges/judge_passthrough/recodex-data-only-wrapper.sh
@@ -9,6 +9,15 @@ if [[ "$EXECUTABLE" == *.jar ]]; then
 	EXECUTABLE="java -jar $EXECUTABLE"
 fi
 
-OUTPUT=`"$EXECUTABLE" "$@"`
+TMPFILE=`mktemp`
+OUTPUT=`"$EXECUTABLE" "$@" 2>"$TMPFILE"`
+
 echo $?
-echo "$OUTPUT"
+
+echo "$OUTPUT" | base64 -w 0
+echo
+
+cat "$TMPFILE" | base64 -w 0
+echo
+
+rm -rf "$TMPFILE" 1>/dev/null 2>/dev/null