diff --git a/esptool/targets/stub_flasher/stub_flasher_32s3.json b/esptool/targets/stub_flasher/stub_flasher_32s3.json
index 0fe3f53337..9d28b05f38 100644
--- a/esptool/targets/stub_flasher/stub_flasher_32s3.json
+++ b/esptool/targets/stub_flasher/stub_flasher_32s3.json
@@ -1,7 +1,7 @@
 {
-    "entry": 1077381512,
-    "text": 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",
+    "entry": 1077381540,
+    "text": "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",
     "text_start": 1077379072,
-    "data": "CADKPw==",
+    "data": "ZCvKP/6MN0DkjTdAp5I3QG+ON0AGjjdAb443QM+ON0CajzdADZA3QLWPN0CJjDdAL483QIyPN0DyjjdAMJA3QBqPN0AwkDdA0o03QDGON0BvjjdAz443QOqNN0DKjDdA75A3QG2SN0CmizdAjZI3QKaLN0CmizdApos3QKaLN0CmizdApos3QKaLN0CmizdAipA3QKaLN0CFkTdAbZI3QA==",
     "data_start": 1070279668
 }
\ No newline at end of file
diff --git a/flasher_stub/include/soc_support.h b/flasher_stub/include/soc_support.h
index 9aa16609c3..bc34da9499 100644
--- a/flasher_stub/include/soc_support.h
+++ b/flasher_stub/include/soc_support.h
@@ -77,6 +77,7 @@
 #define USB_BASE_REG        0x60080000
 #define RTCCNTL_BASE_REG    0x60008000 /* RTC Control */
 #define USB_DEVICE_BASE_REG 0x60038000
+#define SYSTEM_BASE_REG     0x600C0000
 #endif
 
 #ifdef ESP32C3
@@ -283,6 +284,22 @@
 
 #define RTC_CNTL_FORCE_DOWNLOAD_BOOT  (1 << 0)
 
+/**********************************************************
+ * SYSTEM registers
+ */
+
+#ifdef ESP32S3
+#define SYSTEM_CPU_PER_CONF_REG       (SYSTEM_BASE_REG + 0x010)
+#define SYSTEM_CPUPERIOD_SEL_M        ((SYSTEM_CPUPERIOD_SEL_V)<<(SYSTEM_CPUPERIOD_SEL_S))
+#define SYSTEM_CPUPERIOD_SEL_V        0x3
+#define SYSTEM_CPUPERIOD_SEL_S        0
+
+#define SYSTEM_SYSCLK_CONF_REG        (SYSTEM_BASE_REG + 0x060)
+#define SYSTEM_SOC_CLK_SEL_M          ((SYSTEM_SOC_CLK_SEL_V)<<(SYSTEM_SOC_CLK_SEL_S))
+#define SYSTEM_SOC_CLK_SEL_V          0x3
+#define SYSTEM_SOC_CLK_SEL_S          10
+#endif
+
 /**********************************************************
  * Per-SOC security info buffer size
  */
diff --git a/flasher_stub/stub_flasher.c b/flasher_stub/stub_flasher.c
index 14b6b397ef..1cfd1fb48d 100644
--- a/flasher_stub/stub_flasher.c
+++ b/flasher_stub/stub_flasher.c
@@ -368,6 +368,12 @@ void stub_main()
   /* this points to stub_main now, clear for next boot */
   ets_set_user_start(0);
 
+#ifdef ESP32S3
+  /* Set CPU frequency to 240 MHz. This also increases SPI speed to 20 MHz. */
+  WRITE_REG(SYSTEM_CPU_PER_CONF_REG, (READ_REG(SYSTEM_CPU_PER_CONF_REG) & ~SYSTEM_CPUPERIOD_SEL_M) | (2 << SYSTEM_CPUPERIOD_SEL_S));
+  WRITE_REG(SYSTEM_SYSCLK_CONF_REG, (READ_REG(SYSTEM_SYSCLK_CONF_REG) & ~SYSTEM_SOC_CLK_SEL_M) | (1 << SYSTEM_SOC_CLK_SEL_S));
+#endif
+
   /* zero bss */
   for(uint32_t *p = &_bss_start; p < &_bss_end; p++) {
     *p = 0;