diff --git a/Misc/NEWS.d/next/Windows/2023-01-25-00-23-31.gh-issue-99834.WN41lc.rst b/Misc/NEWS.d/next/Windows/2023-01-25-00-23-31.gh-issue-99834.WN41lc.rst
new file mode 100644
index 00000000000000..d3894fa4ea3012
--- /dev/null
+++ b/Misc/NEWS.d/next/Windows/2023-01-25-00-23-31.gh-issue-99834.WN41lc.rst
@@ -0,0 +1 @@
+Updates bundled copy of Tcl/Tk to 8.6.13.0
diff --git a/PC/layout/main.py b/PC/layout/main.py
index 17d27bba6640c5..c9246007d47d18 100644
--- a/PC/layout/main.py
+++ b/PC/layout/main.py
@@ -35,7 +35,7 @@
 
 IDLE_DIRS_ONLY = FileNameSet("idlelib")
 
-TCLTK_PYDS_ONLY = FileStemSet("tcl*", "tk*", "_tkinter")
+TCLTK_PYDS_ONLY = FileStemSet("tcl*", "tk*", "_tkinter", "zlib1")
 TCLTK_DIRS_ONLY = FileNameSet("tkinter", "turtledemo")
 TCLTK_FILES_ONLY = FileNameSet("turtle.py")
 
diff --git a/PCbuild/_tkinter.vcxproj b/PCbuild/_tkinter.vcxproj
index af813b77c1d1c8..30cedcbb43de76 100644
--- a/PCbuild/_tkinter.vcxproj
+++ b/PCbuild/_tkinter.vcxproj
@@ -111,6 +111,7 @@
   <ItemGroup>
     <_TclTkDLL Include="$(tcltkdir)\bin\$(tclDllName)" />
     <_TclTkDLL Include="$(tcltkdir)\bin\$(tkDllName)" />
+    <_TclTkDLL Include="$(tcltkdir)\bin\$(tclZlibDllName)" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="pythoncore.vcxproj">
diff --git a/PCbuild/get_externals.bat b/PCbuild/get_externals.bat
index 7efdeb2d30a72c..0a41d131a3e887 100644
--- a/PCbuild/get_externals.bat
+++ b/PCbuild/get_externals.bat
@@ -55,8 +55,8 @@ set libraries=%libraries%                                       bzip2-1.0.8
 if NOT "%IncludeLibffiSrc%"=="false" set libraries=%libraries%  libffi-3.4.3
 if NOT "%IncludeSSLSrc%"=="false" set libraries=%libraries%     openssl-1.1.1s
 set libraries=%libraries%                                       sqlite-3.39.4.0
-if NOT "%IncludeTkinterSrc%"=="false" set libraries=%libraries% tcl-core-8.6.12.1
-if NOT "%IncludeTkinterSrc%"=="false" set libraries=%libraries% tk-8.6.12.1
+if NOT "%IncludeTkinterSrc%"=="false" set libraries=%libraries% tcl-core-8.6.13.0
+if NOT "%IncludeTkinterSrc%"=="false" set libraries=%libraries% tk-8.6.13.0
 if NOT "%IncludeTkinterSrc%"=="false" set libraries=%libraries% tix-8.4.3.6
 set libraries=%libraries%                                       xz-5.2.5
 set libraries=%libraries%                                       zlib-1.2.13
@@ -78,7 +78,7 @@ echo.Fetching external binaries...
 set binaries=
 if NOT "%IncludeLibffi%"=="false"  set binaries=%binaries% libffi-3.4.3
 if NOT "%IncludeSSL%"=="false"     set binaries=%binaries% openssl-bin-1.1.1s
-if NOT "%IncludeTkinter%"=="false" set binaries=%binaries% tcltk-8.6.12.1
+if NOT "%IncludeTkinter%"=="false" set binaries=%binaries% tcltk-8.6.13.0
 if NOT "%IncludeSSLSrc%"=="false"  set binaries=%binaries% nasm-2.11.06
 
 for %%b in (%binaries%) do (
diff --git a/PCbuild/tcltk.props b/PCbuild/tcltk.props
index 7fd43e8279e8e4..15c03e20fe2171 100644
--- a/PCbuild/tcltk.props
+++ b/PCbuild/tcltk.props
@@ -4,8 +4,8 @@
   <PropertyGroup>
     <TclMajorVersion>8</TclMajorVersion>
     <TclMinorVersion>6</TclMinorVersion>
-    <TclPatchLevel>12</TclPatchLevel>
-    <TclRevision>1</TclRevision>
+    <TclPatchLevel>13</TclPatchLevel>
+    <TclRevision>0</TclRevision>
     <TkMajorVersion>$(TclMajorVersion)</TkMajorVersion>
     <TkMinorVersion>$(TclMinorVersion)</TkMinorVersion>
     <TkPatchLevel>$(TclPatchLevel)</TkPatchLevel>
@@ -27,6 +27,7 @@
     <tclShExeName>tclsh$(TclMajorVersion)$(TclMinorVersion)t$(TclDebugExt).exe</tclShExeName>
     <tkDLLName>tk$(TkMajorVersion)$(TkMinorVersion)t$(TclDebugExt).dll</tkDLLName>
     <tkLibName>tk$(TkMajorVersion)$(TkMinorVersion)t$(TclDebugExt).lib</tkLibName>
+    <tclZlibDLLName>zlib1.dll</tclZlibDLLName>
     <tixDLLName>tix$(TixMajorVersion)$(TixMinorVersion)$(TclDebugExt).dll</tixDLLName>
     <tixDLLPath>$(tcltkDir)lib\tix$(TixMajorVersion).$(TixMinorVersion).$(TixPatchLevel)\$(tixDLLName)</tixDLLPath>
     <tcltkLib>$(tcltkDir)lib\tcl$(TclMajorVersion)$(TclMinorVersion)t$(TclDebugExt).lib;$(tcltkDir)lib\tk$(TkMajorVersion)$(TkMinorVersion)t$(TclDebugExt).lib</tcltkLib>
diff --git a/Tools/msi/tcltk/tcltk_files.wxs b/Tools/msi/tcltk/tcltk_files.wxs
index 119451078096c4..5dad7c98d4f048 100644
--- a/Tools/msi/tcltk/tcltk_files.wxs
+++ b/Tools/msi/tcltk/tcltk_files.wxs
@@ -16,6 +16,9 @@
             <Component Id="tk86t.dll" Directory="DLLs" Guid="*">
                 <File Name="tk86t.dll" KeyPath="yes" />
             </Component>
+            <Component Id="zlib1.dll" Directory="DLLs" Guid="*">
+                <File Name="zlib1.dll" KeyPath="yes" />
+            </Component>
         </ComponentGroup>
     </Fragment>