diff --git a/src/abfall.cpp b/src/abfall.cpp
index f914b7c..c4b21e9 100644
--- a/src/abfall.cpp
+++ b/src/abfall.cpp
@@ -30,8 +30,8 @@ int main() {
 
 #ifdef DEBUG
     printf("!!! DEBUG mode !!!\n");
-#endif
     printf("Firmware version: %s\n", PROJECT_VERSION);
+#endif
 
     wifi_enable(); // Enable Wifi in order to set time and retrieve data
 
diff --git a/src/http_client.cpp b/src/http_client.cpp
index 9ea3e99..c899c6c 100644
--- a/src/http_client.cpp
+++ b/src/http_client.cpp
@@ -1,6 +1,5 @@
 #include "http_client.h"
 
-#include <iostream>
 #include <memory>
 
 std::unique_ptr<char[]> myBodyBuffer = nullptr;
@@ -72,7 +71,7 @@ std::string HttpClient::retrieveWasteDatesAsCsv() {
     received = false;
 
 #ifdef DEBUG
-    std::cout << result << std::endl;
+    printf("%s", result.c_str());
 #endif
 
     return result;
diff --git a/src/utils.cpp b/src/utils.cpp
index 8a97c95..5584cb0 100644
--- a/src/utils.cpp
+++ b/src/utils.cpp
@@ -213,7 +213,9 @@ void recover_from_sleep(uint scb_orig, uint clock0_orig, uint clock1_orig) {
 }
 
 void perform_sleep(datetime_t &untilDt) {
+#ifdef DEBUG
     printf("Going to sleep...\n");
+#endif
     uart_default_tx_wait_blocking();
 
     sleep_goto_sleep_until(&untilDt, nullptr);