diff --git a/screen_manager/CHANGELOG.md b/screen_manager/CHANGELOG.md
index a6b51f1..4092080 100644
--- a/screen_manager/CHANGELOG.md
+++ b/screen_manager/CHANGELOG.md
@@ -1,3 +1,10 @@
+## 0.2.69 (firmware 0.2.58)
+
+A very large sensor value no longer stops a screen's updates.
+
+- **A screen kept getting updates.** Since 0.2.67 a sensor tile with a display precision rounds its value as Home Assistant shows it. A value with more than 28 digits, such as `1e30` from a template or counter, made that rounding fail, and the screen with that tile then got no layout or state updates at all until the value changed. Such a value now shows as it is, and the rest of the screen goes on.
+- No firmware change: firmware stays 0.2.58. Includes everything from 0.2.68.
+
 ## 0.2.68 (firmware 0.2.58)
 
 Put a new screen on from your own computer.
diff --git a/screen_manager/app/core.py b/screen_manager/app/core.py
index 40f4485..8ab5883 100644
--- a/screen_manager/app/core.py
+++ b/screen_manager/app/core.py
@@ -1001,8 +1001,11 @@ def rounded_state(value, precision):
         return value
     if not math.isfinite(number):
         return value
-    from decimal import ROUND_HALF_UP, Decimal
-    text = format(Decimal(str(value)).quantize(Decimal(1).scaleb(-precision), rounding=ROUND_HALF_UP), 'f')
+    from decimal import ROUND_HALF_UP, Decimal, InvalidOperation
+    try:
+        text = format(Decimal(str(value)).quantize(Decimal(1).scaleb(-precision), rounding=ROUND_HALF_UP), 'f')
+    except InvalidOperation:  # more digits than Decimal's context holds, such as 1e30: the value is fine as it is
+        return value
     return text[1:] if text.startswith('-') and not text.strip('-0.') else text
 
 def ha_word(entity_id, suffix, attributes, entry, words):
diff --git a/screen_manager/config.yaml b/screen_manager/config.yaml
index 1cac37a..2e22fe2 100644
--- a/screen_manager/config.yaml
+++ b/screen_manager/config.yaml
@@ -1,5 +1,5 @@
 name: ESP Screen Manager
-version: "0.2.68"
+version: "0.2.69"
 slug: esp_screen_manager
 description: Choose tiles for your CYD and Guition touchscreen, without reflashing.
 url: https://github.com/MaxGramser/homeassistant_espscreen
diff --git a/tests/test_state_words.py b/tests/test_state_words.py
index 82139a2..d758191 100644
--- a/tests/test_state_words.py
+++ b/tests/test_state_words.py
@@ -48,6 +48,8 @@ class Rounding(unittest.TestCase):
         self.assertEqual(rounded_state('21.45', 1), '21.5', 'half up, as the frontend rounds')
         self.assertEqual(rounded_state('1249.6', 0), '1250', 'no thousands separator: the screen reads the number')
         self.assertEqual(rounded_state('-0.04', 1), '0.0')
+        self.assertEqual(rounded_state('1e30', 1), '1e30', 'too many digits to round: the value stays and the sync goes on')
+        self.assertEqual(rounded_state('123456789012345678901234567890.5', 1), '123456789012345678901234567890.5')
         self.assertEqual(rounded_state('3', 2), '3.00')
         for value in ('unavailable', 'on', '', 'nan', 'inf'):
             self.assertEqual(rounded_state(value, 1), value)