diff --git a/Cargo.toml b/Cargo.toml
index 9cf0e13c..648c36a5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,7 +13,7 @@ edition = "2021"
 
 [dependencies]
 cortex-m = "0.7.7"
-cortex-m-rt = { version = "0.7.4", optional = true}
+cortex-m-rt = { version = "0.7.3", optional = true }
 critical-section = { version = "1.1.2", optional = true }
 vcell = "0.1.3"