diff --git a/scripts/dependabot_merge.py b/scripts/dependabot_merge.py
index 00204b7..1cb079b 100644
--- a/scripts/dependabot_merge.py
+++ b/scripts/dependabot_merge.py
@@ -33,6 +33,21 @@ def eligible_commits(commits):
             return False
         types = re.findall(r"(?m)^  update-type: (\S+)\s*$", metadata[1])
         dependencies = re.findall(r"(?m)^- dependency-name: ", metadata[1])
+
+        # Requirement-only bumps omit update-type; trust only the signed,
+        # single-dependency subject with an unambiguous same-major increase.
+        if not types and len(dependencies) == 1 and "update-type:" not in metadata[1]:
+            subject = data["message"].splitlines()[0]
+            bump = re.fullmatch(
+                r"(?:[\w()/-]+: )?update (\S+) requirement from "
+                r">=(\d+\.\d+\.\d+) to >=(\d+\.\d+\.\d+)", subject,
+                re.IGNORECASE)
+            name = re.search(r"(?m)^- dependency-name: (\S+)\s*$", metadata[1])
+            if bump and name and bump[1] == name[1]:
+                before = tuple(map(int, bump[2].split(".")))
+                after = tuple(map(int, bump[3].split(".")))
+                if after > before and after[0] == before[0]:
+                    types = ["version-update:semver-minor"]
         if not types or len(types) != len(dependencies):
             return False
         if any(t not in {"version-update:semver-patch",
diff --git a/scripts/dependabot_merge_test.py b/scripts/dependabot_merge_test.py
index 6803783..d5384e9 100644
--- a/scripts/dependabot_merge_test.py
+++ b/scripts/dependabot_merge_test.py
@@ -57,6 +57,24 @@ def test_unknown_update_type(self):
             "version-update:semver-minor", "unknown")
         self.assertFalse(eligible_commits([self.commit]))
 
+
+    def test_signed_requirement_bump_without_update_type(self):
+        self.commit["commit"]["message"] = (
+            "chore: update example requirement from >=7.6.0 to >=7.7.0\n\n"
+            "---\nupdated-dependencies:\n- dependency-name: example\n"
+            "  dependency-type: direct:production\n...\n")
+        self.assertTrue(eligible_commits([self.commit]))
+        original = self.commit["commit"]["message"]
+        for old, new in [("7.7.0", "8.0.0"), ("7.7.0", "7.5.0"),
+                         ("7.7.0", "7.7.0rc1"), ("update example", "update other"),
+                         (">=7.7.0", "<8"),
+                         ("...\n", "  update-type: unknown\n...\n")]:
+            self.commit["commit"]["message"] = original.replace(old, new)
+            self.assertFalse(eligible_commits([self.commit]), new)
+        self.commit["commit"]["message"] = original
+        self.commit["commit"]["verification"]["verified"] = False
+        self.assertFalse(eligible_commits([self.commit]))
+
     def test_empty_commits(self):
         self.assertFalse(eligible_commits([]))