diff --git a/dts/arm/st/u3/stm32u3.dtsi b/dts/arm/st/u3/stm32u3.dtsi
index 5b4e9cfa960..0179419dfff 100644
--- a/dts/arm/st/u3/stm32u3.dtsi
+++ b/dts/arm/st/u3/stm32u3.dtsi
@@ -99,9 +99,9 @@
 				compatible = "st,stm32-nv-flash", "soc-nv-flash";
 
 				write-block-size = <16>;
-				erase-block-size = <8192>;
-				/* maximum erase time(ms) for a 8K sector */
-				max-erase-time = <5>;
+				erase-block-size = <4096>;
+				/* maximum erase time(ms) for a 4KB page */
+				max-erase-time = <14>;
 			};
 		};