diff --git a/cmake/OptionVariables.cmake b/cmake/OptionVariables.cmake
index f199f5f..f10065e 100644
--- a/cmake/OptionVariables.cmake
+++ b/cmake/OptionVariables.cmake
@@ -174,7 +174,7 @@ option(CPPTRACE_SKIP_UNIT "" OFF)
 option(CPPTRACE_STD_FORMAT "" ON)
 option(CPPTRACE_USE_EXTERNAL_GTEST "" OFF)
 set(CPPTRACE_ZSTD_REPO "https://github.com/facebook/zstd.git" CACHE STRING "")
-set(CPPTRACE_ZSTD_TAG "63779c798237346c2b245c546c40b72a5a5913fe" CACHE STRING "") # v1.5.5
+set(CPPTRACE_ZSTD_TAG "794ea1b0afca0f020f4e57b6732332231fb23c70" CACHE STRING "") # v1.5.6
 set(CPPTRACE_ZSTD_SHALLOW "1" CACHE STRING "")
 set(CPPTRACE_LIBDWARF_REPO "https://github.com/jeremy-rifkin/libdwarf-lite.git" CACHE STRING "")
 set(CPPTRACE_LIBDWARF_TAG "6dbcc23dba6ffd230063bda4b9d7298bf88d9d41" CACHE STRING "") # v0.10.1