diff --git a/php-84/Dockerfile b/php-84/Dockerfile
index cf4004fb..8de53f4b 100644
--- a/php-84/Dockerfile
+++ b/php-84/Dockerfile
@@ -4,7 +4,7 @@
 ARG IMAGE_VERSION_SUFFIX
 
 # https://www.php.net/downloads
-ARG VERSION_PHP=8.4.21
+ARG VERSION_PHP=8.4.22
 
 
 # Lambda uses a custom AMI named Amazon Linux 2
@@ -430,6 +430,13 @@ ARG VERSION_PHP
 RUN curl --location --silent --show-error --fail https://www.php.net/get/php-${VERSION_PHP}.tar.gz/from/this/mirror \
   | tar xzC . --strip-components=1
 
+# Restore the ICU >= 53 guard around Spoofchecker's restriction-level APIs so that
+# ext/intl compiles against Amazon Linux 2's ICU 50.x (backport of
+# https://github.com/php/php-src/pull/22248). Remove once the layers use a PHP 8.4
+# release that already contains the fix.
+COPY php-84/spoofchecker-icu53.patch /tmp/spoofchecker-icu53.patch
+RUN patch -p1 < /tmp/spoofchecker-icu53.patch
+
 # Configure the build
 # -fstack-protector-strong : Be paranoid about stack overflows
 # -fpic : Make PHP's main executable position-independent (improves ASLR security mechanism, and has no performance impact on x86_64)
diff --git a/php-84/spoofchecker-icu53.patch b/php-84/spoofchecker-icu53.patch
new file mode 100644
index 00000000..47d52e46
--- /dev/null
+++ b/php-84/spoofchecker-icu53.patch
@@ -0,0 +1,134 @@
+Backport of https://github.com/php/php-src/pull/22248
+
+PHP 8.4.22 (GH-22055) dropped the ICU version guard around Spoofchecker's
+restriction-level constants and setRestrictionLevel(), so ext/intl no longer
+compiles against ICU older than 53 (e.g. Amazon Linux 2 ships ICU 50.2). This
+restores the guard at the correct floor, ICU 53. Remove once the build uses a
+PHP 8.4 release that already contains the fix.
+
+diff --git a/ext/intl/spoofchecker/spoofchecker_arginfo.h b/ext/intl/spoofchecker/spoofchecker_arginfo.h
+index 99a211b260d..e6b53829081 100644
+--- a/ext/intl/spoofchecker/spoofchecker_arginfo.h
++++ b/ext/intl/spoofchecker/spoofchecker_arginfo.h
+@@ -1,5 +1,5 @@
+ /* This is a generated file, edit the .stub.php file instead.
+- * Stub hash: 4634f8ef9157fb3670a2ddc5e3246340660fc68c */
++ * Stub hash: d01a6d58d52e8b38a7854626d9649d5915ec7e5c */
+ 
+ ZEND_BEGIN_ARG_INFO_EX(arginfo_class_Spoofchecker___construct, 0, 0, 0)
+ ZEND_END_ARG_INFO()
+@@ -23,9 +23,11 @@ ZEND_BEGIN_ARG_WITH_TENTATIVE_RETURN_TYPE_INFO_EX(arginfo_class_Spoofchecker_set
+ 	ZEND_ARG_TYPE_INFO(0, checks, IS_LONG, 0)
+ ZEND_END_ARG_INFO()
+ 
++#if U_ICU_VERSION_MAJOR_NUM >= 53
+ ZEND_BEGIN_ARG_WITH_TENTATIVE_RETURN_TYPE_INFO_EX(arginfo_class_Spoofchecker_setRestrictionLevel, 0, 1, IS_VOID, 0)
+ 	ZEND_ARG_TYPE_INFO(0, level, IS_LONG, 0)
+ ZEND_END_ARG_INFO()
++#endif
+ 
+ ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_class_Spoofchecker_setAllowedChars, 0, 1, IS_VOID, 0)
+ 	ZEND_ARG_TYPE_INFO(0, pattern, IS_STRING, 0)
+@@ -37,7 +39,9 @@ ZEND_METHOD(Spoofchecker, isSuspicious);
+ ZEND_METHOD(Spoofchecker, areConfusable);
+ ZEND_METHOD(Spoofchecker, setAllowedLocales);
+ ZEND_METHOD(Spoofchecker, setChecks);
++#if U_ICU_VERSION_MAJOR_NUM >= 53
+ ZEND_METHOD(Spoofchecker, setRestrictionLevel);
++#endif
+ ZEND_METHOD(Spoofchecker, setAllowedChars);
+ 
+ static const zend_function_entry class_Spoofchecker_methods[] = {
+@@ -46,7 +50,9 @@ static const zend_function_entry class_Spoofchecker_methods[] = {
+ 	ZEND_ME(Spoofchecker, areConfusable, arginfo_class_Spoofchecker_areConfusable, ZEND_ACC_PUBLIC)
+ 	ZEND_ME(Spoofchecker, setAllowedLocales, arginfo_class_Spoofchecker_setAllowedLocales, ZEND_ACC_PUBLIC)
+ 	ZEND_ME(Spoofchecker, setChecks, arginfo_class_Spoofchecker_setChecks, ZEND_ACC_PUBLIC)
++#if U_ICU_VERSION_MAJOR_NUM >= 53
+ 	ZEND_ME(Spoofchecker, setRestrictionLevel, arginfo_class_Spoofchecker_setRestrictionLevel, ZEND_ACC_PUBLIC)
++#endif
+ 	ZEND_ME(Spoofchecker, setAllowedChars, arginfo_class_Spoofchecker_setAllowedChars, ZEND_ACC_PUBLIC)
+ 	ZEND_FE_END
+ };
+@@ -99,48 +105,62 @@ static zend_class_entry *register_class_Spoofchecker(void)
+ 	zend_string *const_CHAR_LIMIT_name = zend_string_init_interned("CHAR_LIMIT", sizeof("CHAR_LIMIT") - 1, 1);
+ 	zend_declare_typed_class_constant(class_entry, const_CHAR_LIMIT_name, &const_CHAR_LIMIT_value, ZEND_ACC_PUBLIC, NULL, (zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_LONG));
+ 	zend_string_release(const_CHAR_LIMIT_name);
++#if U_ICU_VERSION_MAJOR_NUM >= 53
+ 
+ 	zval const_ASCII_value;
+ 	ZVAL_LONG(&const_ASCII_value, USPOOF_ASCII);
+ 	zend_string *const_ASCII_name = zend_string_init_interned("ASCII", sizeof("ASCII") - 1, 1);
+ 	zend_declare_typed_class_constant(class_entry, const_ASCII_name, &const_ASCII_value, ZEND_ACC_PUBLIC, NULL, (zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_LONG));
+ 	zend_string_release(const_ASCII_name);
++#endif
++#if U_ICU_VERSION_MAJOR_NUM >= 53
+ 
+ 	zval const_HIGHLY_RESTRICTIVE_value;
+ 	ZVAL_LONG(&const_HIGHLY_RESTRICTIVE_value, USPOOF_HIGHLY_RESTRICTIVE);
+ 	zend_string *const_HIGHLY_RESTRICTIVE_name = zend_string_init_interned("HIGHLY_RESTRICTIVE", sizeof("HIGHLY_RESTRICTIVE") - 1, 1);
+ 	zend_declare_typed_class_constant(class_entry, const_HIGHLY_RESTRICTIVE_name, &const_HIGHLY_RESTRICTIVE_value, ZEND_ACC_PUBLIC, NULL, (zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_LONG));
+ 	zend_string_release(const_HIGHLY_RESTRICTIVE_name);
++#endif
++#if U_ICU_VERSION_MAJOR_NUM >= 53
+ 
+ 	zval const_MODERATELY_RESTRICTIVE_value;
+ 	ZVAL_LONG(&const_MODERATELY_RESTRICTIVE_value, USPOOF_MODERATELY_RESTRICTIVE);
+ 	zend_string *const_MODERATELY_RESTRICTIVE_name = zend_string_init_interned("MODERATELY_RESTRICTIVE", sizeof("MODERATELY_RESTRICTIVE") - 1, 1);
+ 	zend_declare_typed_class_constant(class_entry, const_MODERATELY_RESTRICTIVE_name, &const_MODERATELY_RESTRICTIVE_value, ZEND_ACC_PUBLIC, NULL, (zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_LONG));
+ 	zend_string_release(const_MODERATELY_RESTRICTIVE_name);
++#endif
++#if U_ICU_VERSION_MAJOR_NUM >= 53
+ 
+ 	zval const_MINIMALLY_RESTRICTIVE_value;
+ 	ZVAL_LONG(&const_MINIMALLY_RESTRICTIVE_value, USPOOF_MINIMALLY_RESTRICTIVE);
+ 	zend_string *const_MINIMALLY_RESTRICTIVE_name = zend_string_init_interned("MINIMALLY_RESTRICTIVE", sizeof("MINIMALLY_RESTRICTIVE") - 1, 1);
+ 	zend_declare_typed_class_constant(class_entry, const_MINIMALLY_RESTRICTIVE_name, &const_MINIMALLY_RESTRICTIVE_value, ZEND_ACC_PUBLIC, NULL, (zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_LONG));
+ 	zend_string_release(const_MINIMALLY_RESTRICTIVE_name);
++#endif
++#if U_ICU_VERSION_MAJOR_NUM >= 53
+ 
+ 	zval const_UNRESTRICTIVE_value;
+ 	ZVAL_LONG(&const_UNRESTRICTIVE_value, USPOOF_UNRESTRICTIVE);
+ 	zend_string *const_UNRESTRICTIVE_name = zend_string_init_interned("UNRESTRICTIVE", sizeof("UNRESTRICTIVE") - 1, 1);
+ 	zend_declare_typed_class_constant(class_entry, const_UNRESTRICTIVE_name, &const_UNRESTRICTIVE_value, ZEND_ACC_PUBLIC, NULL, (zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_LONG));
+ 	zend_string_release(const_UNRESTRICTIVE_name);
++#endif
++#if U_ICU_VERSION_MAJOR_NUM >= 53
+ 
+ 	zval const_SINGLE_SCRIPT_RESTRICTIVE_value;
+ 	ZVAL_LONG(&const_SINGLE_SCRIPT_RESTRICTIVE_value, USPOOF_SINGLE_SCRIPT_RESTRICTIVE);
+ 	zend_string *const_SINGLE_SCRIPT_RESTRICTIVE_name = zend_string_init_interned("SINGLE_SCRIPT_RESTRICTIVE", sizeof("SINGLE_SCRIPT_RESTRICTIVE") - 1, 1);
+ 	zend_declare_typed_class_constant(class_entry, const_SINGLE_SCRIPT_RESTRICTIVE_name, &const_SINGLE_SCRIPT_RESTRICTIVE_value, ZEND_ACC_PUBLIC, NULL, (zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_LONG));
+ 	zend_string_release(const_SINGLE_SCRIPT_RESTRICTIVE_name);
++#endif
++#if U_ICU_VERSION_MAJOR_NUM >= 53
+ 
+ 	zval const_MIXED_NUMBERS_value;
+ 	ZVAL_LONG(&const_MIXED_NUMBERS_value, USPOOF_MIXED_NUMBERS);
+ 	zend_string *const_MIXED_NUMBERS_name = zend_string_init_interned("MIXED_NUMBERS", sizeof("MIXED_NUMBERS") - 1, 1);
+ 	zend_declare_typed_class_constant(class_entry, const_MIXED_NUMBERS_name, &const_MIXED_NUMBERS_value, ZEND_ACC_PUBLIC, NULL, (zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_LONG));
+ 	zend_string_release(const_MIXED_NUMBERS_name);
++#endif
+ #if U_ICU_VERSION_MAJOR_NUM >= 62
+ 
+ 	zval const_HIDDEN_OVERLAY_value;
+diff --git a/ext/intl/spoofchecker/spoofchecker_main.c b/ext/intl/spoofchecker/spoofchecker_main.c
+index 13ac6739264..b03f73103b3 100644
+--- a/ext/intl/spoofchecker/spoofchecker_main.c
++++ b/ext/intl/spoofchecker/spoofchecker_main.c
+@@ -135,6 +135,7 @@ PHP_METHOD(Spoofchecker, setChecks)
+ }
+ /* }}} */
+ 
++#if U_ICU_VERSION_MAJOR_NUM >= 53
+ /* TODO Document this method on PHP.net */
+ /* {{{ Set the loosest restriction level allowed for strings. */
+ PHP_METHOD(Spoofchecker, setRestrictionLevel)
+@@ -163,6 +164,7 @@ PHP_METHOD(Spoofchecker, setRestrictionLevel)
+ 	uspoof_setRestrictionLevel(co->uspoof, (URestrictionLevel)level);
+ }
+ /* }}} */
++#endif
+ 
+ PHP_METHOD(Spoofchecker, setAllowedChars)
+ {