diff --git a/3rdparty/ext_tcl/CMakeLists.txt b/3rdparty/ext_tcl/CMakeLists.txt
index bb4615fb1..0a46234ba 100644
--- a/3rdparty/ext_tcl/CMakeLists.txt
+++ b/3rdparty/ext_tcl/CMakeLists.txt
@@ -1,10 +1,10 @@
 ExternalProject_Add(
   ext_tcl
   DOWNLOAD_DIR ${EXT_DOWNLOAD_DIR}
   URL https://github.com/tcltk/tcl/archive/core-8-6-8.zip
-  URL_MD5 8fd508d3d2216b9c75895d6141219eab
+  URL_MD5 36fbbc668961044fdda89c5ee2ba67a2
 
   CONFIGURE_COMMAND <SOURCE_DIR>/unix/configure --prefix=${EXT_INSTALL_DIR} ${AT_HOST} ${AT_SHARED_ONLY} --enable-threads --enable-64bit
   BUILD_COMMAND $(MAKE)
   INSTALL_COMMAND $(MAKE) install
 )