diff --git a/dangerfile.py b/dangerfile.py
index 76fe5e91d2..7ad682c53f 100644
--- a/dangerfile.py
+++ b/dangerfile.py
@@ -174,6 +174,7 @@ if not danger.gitlab.mr.milestone:
 BACKPORT_OF_RE = re.compile(
     r"Backport\s+of.*(merge_requests/|!)([0-9]+)", flags=re.IGNORECASE
 )
+VERSION_LABEL_RE = re.compile(r"v9.([0-9]+)(-S)?")
 backport_desc = BACKPORT_OF_RE.search(danger.gitlab.mr.description)
 version_labels = [l for l in mr_labels if l.startswith("v9.")]
 if is_backport:
@@ -183,11 +184,14 @@ if is_backport:
             "Please also set exactly one version label (*v9.x*)."
         )
     else:
-        mr_title_version = f"[{version_labels[0].replace('.', '_')}]"
-        if mr_title_version not in danger.gitlab.mr.title:
+        minor_ver, edition = VERSION_LABEL_RE.search(version_labels[0]).groups()
+        edition = "" if edition is None else edition
+        title_re = f"^\\[9.{minor_ver}{edition}\\]"
+        match = re.search(title_re, danger.gitlab.mr.title)
+        if match is None:
             fail(
-                "Backport MRs must have their target branch in the "
-                f"title. Please put `{mr_title_version}` in the MR title."
+                "Backport MRs must have their target version in the title. "
+                f"Please put `[9.{minor_ver}{edition}]` at the start of the MR title."
             )
     if backport_desc is None:
         fail(