diff --git a/blockkit/core.py b/blockkit/core.py
index 0c077df..99b2dda 100644
--- a/blockkit/core.py
+++ b/blockkit/core.py
@@ -2960,7 +2960,7 @@ def __init__(
         self.accessory(accessory)
         self.expand(expand)
         self.block_id(block_id)
-        self._add_validator(OnlyOne("text", "fields"))
+        self._add_validator(AtLeastOne("text", "fields"))
 
     def text(self, text: str | Text | None) -> Self:
         if isinstance(text, str):