diff --git a/slack_sdk/models/blocks/block_elements.py b/slack_sdk/models/blocks/block_elements.py
index b38cf21e0..d176cfb24 100644
--- a/slack_sdk/models/blocks/block_elements.py
+++ b/slack_sdk/models/blocks/block_elements.py
@@ -2032,11 +2032,13 @@ def __init__(
             italic: Optional[bool] = None,
             strike: Optional[bool] = None,
             code: Optional[bool] = None,
+            underline: Optional[bool] = None,
         ):
             self.bold = bold
             self.italic = italic
             self.strike = strike
             self.code = code
+            self.underline = underline
 
         def to_dict(self, *args) -> dict:
             result = {
@@ -2044,6 +2046,7 @@ def to_dict(self, *args) -> dict:
                 "italic": self.italic,
                 "strike": self.strike,
                 "code": self.code,
+                "underline": self.underline,
             }
             return {k: v for k, v in result.items() if v is not None}
 
diff --git a/tests/slack_sdk/models/test_blocks.py b/tests/slack_sdk/models/test_blocks.py
index adacf1427..a07ce11b8 100644
--- a/tests/slack_sdk/models/test_blocks.py
+++ b/tests/slack_sdk/models/test_blocks.py
@@ -1037,6 +1037,8 @@ def test_complex(self):
                         {"type": "text", "text": "block", "style": {"code": True}},
                         {"type": "text", "text": " "},
                         {"type": "text", "text": "test", "style": {"italic": True}},
+                        {"type": "text", "text": " "},
+                        {"type": "text", "text": "links", "style": {"underline": True}},
                         {"type": "link", "url": "https://slack.com", "text": "Slack website!"},
                     ],
                 },
@@ -1138,6 +1140,8 @@ def test_complex(self):
                         _.Text(text="block", style=_.TextStyle(code=True)),
                         _.Text(text=" "),
                         _.Text(text="test", style=_.TextStyle(italic=True)),
+                        _.Text(text=" "),
+                        _.Text(text="links", style=_.TextStyle(underline=True)),
                         _.Link(text="Slack website!", url="https://slack.com"),
                     ]
                 ),