diff --git a/config.m4 b/config.m4
index f0a12cf..304eccd 100644
--- a/config.m4
+++ b/config.m4
@@ -73,6 +73,7 @@ if test "$PHP_ZSTD" != "no"; then
       zstd/lib/compress/zstd_lazy.c
       zstd/lib/compress/zstd_ldm.c
       zstd/lib/compress/zstd_opt.c
+      zstd/lib/compress/zstd_preSplit.c
       zstd/lib/compress/zstdmt_compress.c
     "
     ZSTD_DECOMPRESS_SOURCES="
diff --git a/config.w32 b/config.w32
index 07443f9..466da7c 100644
--- a/config.w32
+++ b/config.w32
@@ -20,7 +20,7 @@ if (PHP_ZSTD != "no") {
     EXTENSION("zstd", "zstd.c", null, "/DZEND_ENABLE_STATIC_TSRMLS_CACHE=1");
 
     ADD_SOURCES("zstd/lib/common", "debug.c entropy_common.c error_private.c fse_decompress.c pool.c threading.c xxhash.c zstd_common.c", "zstd");
-    ADD_SOURCES("zstd/lib/compress", "fse_compress.c hist.c huf_compress.c zstd_compress.c zstd_compress_literals.c zstd_compress_sequences.c zstd_compress_superblock.c zstd_double_fast.c zstd_fast.c zstd_lazy.c zstd_ldm.c zstd_opt.c zstdmt_compress.c", "zstd");
+    ADD_SOURCES("zstd/lib/compress", "fse_compress.c hist.c huf_compress.c zstd_compress.c zstd_compress_literals.c zstd_compress_sequences.c zstd_compress_superblock.c zstd_double_fast.c zstd_fast.c zstd_lazy.c zstd_ldm.c zstd_opt.c zstd_preSplit.c zstdmt_compress.c", "zstd");
     ADD_SOURCES("zstd/lib/decompress", "huf_decompress.c zstd_ddict.c zstd_decompress.c zstd_decompress_block.c", "zstd");
 
     ADD_FLAG("CFLAGS_ZSTD", " /I" + configure_module_dirname + " /I" + configure_module_dirname + "/zstd/lib/common" + " /I" + configure_module_dirname + "/zstd/lib");
diff --git a/zstd b/zstd
index 794ea1b..f8745da 160000
--- a/zstd
+++ b/zstd
@@ -1 +1 @@
-Subproject commit 794ea1b0afca0f020f4e57b6732332231fb23c70
+Subproject commit f8745da6ff1ad1e7bab384bd1f9d742439278e99