diff --git a/news/fix-manual-open.rst b/news/fix-manual-open.rst
new file mode 100644
index 0000000..27fc85d
--- /dev/null
+++ b/news/fix-manual-open.rst
@@ -0,0 +1,23 @@
+**Added:**
+
+* No news needed.
+
+**Changed:**
+
+* <news item>
+
+**Deprecated:**
+
+* <news item>
+
+**Removed:**
+
+* <news item>
+
+**Fixed:**
+
+* <news item>
+
+**Security:**
+
+* <news item>
diff --git a/src/diffpy/cmi/cli.py b/src/diffpy/cmi/cli.py
index cc41441..1b3eb90 100644
--- a/src/diffpy/cmi/cli.py
+++ b/src/diffpy/cmi/cli.py
@@ -34,7 +34,7 @@ def open_manual_and_exit() -> None:
     """
     import webbrowser
 
-    url = "diffpy.org/diffpy.cmi"
+    url = "https://diffpy.org/diffpy.cmi"
     plog.info("Opening manual at %s", url)
     webbrowser.open(url)
     raise SystemExit(0)