diff --git a/Misc/NEWS b/Misc/NEWS
index ef7433b..3955ab1 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -1672,6 +1672,8 @@
 Build
 -----
 
+- Use OpenSSL 1.0.0a on Windows.
+
 - Issue #9280: Make sharedinstall depend on sharedmods.
 
 - Issue #9189: Make a user-specified CFLAGS, CPPFLAGS, or LDFLAGS
diff --git a/PCbuild/pyproject.vsprops b/PCbuild/pyproject.vsprops
index 1b96e35..52cef12 100644
--- a/PCbuild/pyproject.vsprops
+++ b/PCbuild/pyproject.vsprops
@@ -58,7 +58,7 @@
 	/>
 	<UserMacro
 		Name="opensslDir"
-		Value="$(externalsDir)\openssl-0.9.8l"
+		Value="$(externalsDir)\openssl-1.0.0a"
 	/>
 	<UserMacro
 		Name="tcltkDir"
diff --git a/PCbuild/readme.txt b/PCbuild/readme.txt
index 8742b46..eec7d4c 100644
--- a/PCbuild/readme.txt
+++ b/PCbuild/readme.txt
@@ -139,7 +139,7 @@
 
     Get the source code through
 
-    svn export http://svn.python.org/projects/external/openssl-0.9.8l
+    svn export http://svn.python.org/projects/external/openssl-1.0.0a
 
     ** NOTE: if you use the Tools\buildbot\external(-amd64).bat approach for
     obtaining external sources then you don't need to manually get the source