diff --git a/wish/cpp/CMakeLists.txt b/wish/cpp/CMakeLists.txt
index 372d38c..4722351 100644
--- a/wish/cpp/CMakeLists.txt
+++ b/wish/cpp/CMakeLists.txt
@@ -23,7 +23,7 @@ set(WSLAY_EXAMPLES OFF CACHE BOOL "" FORCE)
 FetchContent_Declare(
     wslay
     GIT_REPOSITORY https://github.com/tatsuhiro-t/wslay.git
-    GIT_TAG        master
+    GIT_TAG        0e7d106ff89ad6638090fd811a9b2e4c5dda8d40
     PATCH_COMMAND  git apply --reverse --check ${CMAKE_CURRENT_SOURCE_DIR}/patches/wslay-disable-mask.patch || git apply ${CMAKE_CURRENT_SOURCE_DIR}/patches/wslay-disable-mask.patch
 )