diff --git a/CHANGELOG.md b/CHANGELOG.md
index e2de899..f93bb3f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@ All notable changes to this project will be documented in this file.
 
 ## Unreleased
 
+- Upgrade zstd source code from v1.5.6 to [v1.5.7](https://github.com/facebook/zstd/releases/tag/v1.5.7)
 - Support for PyPy 3.11
 
 ## 0.16.2 (October 10, 2024)
diff --git a/setup.py b/setup.py
index 6ac364d..5e97e24 100644
--- a/setup.py
+++ b/setup.py
@@ -60,6 +60,13 @@ def build_extensions(self):
         # Build debug build
         self.debug = self.PYZSTD_DEBUG
 
+        if self.compiler.compiler_type in ('unix', 'mingw32', 'cygwin'):
+            # Remove -Wunreachable-code default args based on how Python was build
+            # see distutils.sysconfig.get_config_var("CFLAGS")
+            # see https://github.com/facebook/zstd/issues/4308
+            self.compiler.compiler = [part for part in self.compiler.compiler if part != '-Wunreachable-code']
+            self.compiler.compiler_so = [part for part in self.compiler.compiler_so if part != '-Wunreachable-code']
+
         for extension in self.extensions:
             if self.compiler.compiler_type in ('unix', 'mingw32', 'cygwin'):
                 # -g0:
diff --git a/zstd b/zstd
index 794ea1b..f8745da 160000
--- a/zstd
+++ b/zstd
@@ -1 +1 @@
-Subproject commit 794ea1b0afca0f020f4e57b6732332231fb23c70
+Subproject commit f8745da6ff1ad1e7bab384bd1f9d742439278e99