diff --git a/thirdparty/README.md b/thirdparty/README.md
index 8ca221235491..1746ef77a354 100644
--- a/thirdparty/README.md
+++ b/thirdparty/README.md
@@ -264,7 +264,7 @@ Files extracted from upstream source:
 ## icu4c
 
 - Upstream: https://github.com/unicode-org/icu
-- Version: 73.1 (5861e1fd52f1d7673eee38bc3c965aa18b336062, 2023)
+- Version: 73.2 (680f521746a3bd6a86f25f25ee50a62d88b489cf, 2023)
 - License: Unicode
 
 Files extracted from upstream source:
@@ -280,10 +280,11 @@ Files generated from upstream source:
   https://github.com/unicode-org/icu/blob/master/docs/userguide/icu_data/buildtool.md
   for instructions).
 
-- Step 1: Build ICU with default options - `./runConfigureICU {PLATFORM} && make`.
-- Step 2: Reconfigure ICU with custom data config - `ICU_DATA_FILTER_FILE={GODOT_SOURCE}/thirdparty/icu4c/godot_data.json ./runConfigureICU {PLATFORM} --with-data-packaging=common`.
-- Step 3: Delete `data/out` folder and rebuild data - `cd data && rm -rf ./out && make`.
-- Step 4: Copy `source/data/out/icudt73l.dat` to the `{GODOT_SOURCE}/thirdparty/icu4c/icudt73l.dat`.
+- Step 1: Download and extract both `icu4c-{version}-src.tgz` and `icu4c-{version}-data.zip` (replace `data` subfolder from the main source archive).
+- Step 2: Build ICU with default options - `./runConfigureICU {PLATFORM} && make`.
+- Step 3: Reconfigure ICU with custom data config - `ICU_DATA_FILTER_FILE={GODOT_SOURCE}/thirdparty/icu4c/godot_data.json ./runConfigureICU {PLATFORM} --with-data-packaging=common`.
+- Step 4: Delete `data/out` folder and rebuild data - `cd data && rm -rf ./out && make`.
+- Step 5: Copy `source/data/out/icudt73l.dat` to the `{GODOT_SOURCE}/thirdparty/icu4c/icudt73l.dat`.
 
 
 ## jpeg-compressor
diff --git a/thirdparty/icu4c/common/unicode/ures.h b/thirdparty/icu4c/common/unicode/ures.h
index cc25b6e49cd1..babc01d426a6 100644
--- a/thirdparty/icu4c/common/unicode/ures.h
+++ b/thirdparty/icu4c/common/unicode/ures.h
@@ -25,6 +25,7 @@
 #ifndef URES_H
 #define URES_H
 
+#include "unicode/char16ptr.h"
 #include "unicode/utypes.h"
 #include "unicode/uloc.h"
 
@@ -812,7 +813,7 @@ inline UnicodeString
 ures_getUnicodeString(const UResourceBundle *resB, UErrorCode* status) {
     UnicodeString result;
     int32_t len = 0;
-    const char16_t *r = ures_getString(resB, &len, status);
+    const char16_t *r = ConstChar16Ptr(ures_getString(resB, &len, status));
     if(U_SUCCESS(*status)) {
         result.setTo(true, r, len);
     } else {
@@ -837,7 +838,7 @@ inline UnicodeString
 ures_getNextUnicodeString(UResourceBundle *resB, const char ** key, UErrorCode* status) {
     UnicodeString result;
     int32_t len = 0;
-    const char16_t* r = ures_getNextString(resB, &len, key, status);
+    const char16_t* r = ConstChar16Ptr(ures_getNextString(resB, &len, key, status));
     if(U_SUCCESS(*status)) {
         result.setTo(true, r, len);
     } else {
@@ -859,7 +860,7 @@ inline UnicodeString
 ures_getUnicodeStringByIndex(const UResourceBundle *resB, int32_t indexS, UErrorCode* status) {
     UnicodeString result;
     int32_t len = 0;
-    const char16_t* r = ures_getStringByIndex(resB, indexS, &len, status);
+    const char16_t* r = ConstChar16Ptr(ures_getStringByIndex(resB, indexS, &len, status));
     if(U_SUCCESS(*status)) {
         result.setTo(true, r, len);
     } else {
@@ -882,7 +883,7 @@ inline UnicodeString
 ures_getUnicodeStringByKey(const UResourceBundle *resB, const char* key, UErrorCode* status) {
     UnicodeString result;
     int32_t len = 0;
-    const char16_t* r = ures_getStringByKey(resB, key, &len, status);
+    const char16_t* r = ConstChar16Ptr(ures_getStringByKey(resB, key, &len, status));
     if(U_SUCCESS(*status)) {
         result.setTo(true, r, len);
     } else {
diff --git a/thirdparty/icu4c/common/unicode/uvernum.h b/thirdparty/icu4c/common/unicode/uvernum.h
index f0fc671b4b60..fc784b2492f0 100644
--- a/thirdparty/icu4c/common/unicode/uvernum.h
+++ b/thirdparty/icu4c/common/unicode/uvernum.h
@@ -59,7 +59,7 @@
  *  This value will change in the subsequent releases of ICU
  *  @stable ICU 2.6
  */
-#define U_ICU_VERSION_MINOR_NUM 1
+#define U_ICU_VERSION_MINOR_NUM 2
 
 /** The current ICU patchlevel version as an integer.
  *  This value will change in the subsequent releases of ICU
@@ -132,7 +132,7 @@
  *  This value will change in the subsequent releases of ICU
  *  @stable ICU 2.4
  */
-#define U_ICU_VERSION "73.1"
+#define U_ICU_VERSION "73.2"
 
 /**
  * The current ICU library major version number as a string, for library name suffixes.
@@ -151,7 +151,7 @@
 /** Data version in ICU4C.
  * @internal ICU 4.4 Internal Use Only
  **/
-#define U_ICU_DATA_VERSION "73.1"
+#define U_ICU_DATA_VERSION "73.2"
 #endif  /* U_HIDE_INTERNAL_API */
 
 /*===========================================================================
diff --git a/thirdparty/icu4c/icudt73l.dat b/thirdparty/icu4c/icudt73l.dat
index b8e2cf7567f3..fc007e5f965e 100644
Binary files a/thirdparty/icu4c/icudt73l.dat and b/thirdparty/icu4c/icudt73l.dat differ