diff --git a/.github/actions/bot-changelog-generator/generate_changelog.py b/.github/actions/bot-changelog-generator/generate_changelog.py
index 26e85364..e444e81e 100644
--- a/.github/actions/bot-changelog-generator/generate_changelog.py
+++ b/.github/actions/bot-changelog-generator/generate_changelog.py
@@ -465,6 +465,7 @@ def build_prompt(
         f"- Keep the first line within {COMMIT_SUBJECT_LIMIT} characters, "
         "including the tag and spaces\n"
         "- Capitalize the first word after the tag\n"
+        "- Use past tense for the commit message (e.g., 'Added', 'Fixed', 'Changed')\n"
         "- The message must contain a body after one blank line\n"
         "- If an issue number appears in the title, the same issue number must "
         "appear in the body footer\n"
diff --git a/.github/actions/bot-changelog-generator/test_generate_changelog.py b/.github/actions/bot-changelog-generator/test_generate_changelog.py
index de1b0d3c..961f2cd5 100644
--- a/.github/actions/bot-changelog-generator/test_generate_changelog.py
+++ b/.github/actions/bot-changelog-generator/test_generate_changelog.py
@@ -392,6 +392,7 @@ def test_builds_basic_prompt(self):
             f"within {COMMIT_SUBJECT_LIMIT} characters, including the tag and spaces",
             system_instruction,
         )
+        self.assertIn("Use past tense for the commit message", system_instruction)
         self.assertIn(
             "If any rule below is broken, the output is invalid.",
             system_instruction,