diff --git a/cpu/esp32/include/sdk_conf.h b/cpu/esp32/include/sdk_conf.h
index 79260b3315..dc2057c9eb 100644
--- a/cpu/esp32/include/sdk_conf.h
+++ b/cpu/esp32/include/sdk_conf.h
@@ -147,9 +147,9 @@ extern "C" {
 #define CONFIG_ESP32_WIFI_TX_BUFFER_TYPE        1
 #define CONFIG_ESP32_WIFI_STATIC_TX_BUFFER      0
 #define CONFIG_ESP32_WIFI_DYNAMIC_TX_BUFFER     1
-#define CONFIG_ESP32_WIFI_DYNAMIC_TX_BUFFER_NUM 48
+#define CONFIG_ESP32_WIFI_DYNAMIC_TX_BUFFER_NUM 20
 #define CONFIG_ESP32_WIFI_STATIC_RX_BUFFER_NUM  10
-#define CONFIG_ESP32_WIFI_DYNAMIC_RX_BUFFER_NUM 64
+#define CONFIG_ESP32_WIFI_DYNAMIC_RX_BUFFER_NUM 20
 #define CONFIG_ESP32_WIFI_AMPDU_TX_ENABLED      1
 #define CONFIG_ESP32_WIFI_AMPDU_RX_ENABLED      1
 #define CONFIG_ESP32_WIFI_TX_BA_WIN             6