diff --git a/beginner/apps/Cargo.toml b/beginner/apps/Cargo.toml
index 7ba1c1f..61ee794 100644
--- a/beginner/apps/Cargo.toml
+++ b/beginner/apps/Cargo.toml
@@ -6,13 +6,13 @@ name = "apps"
 version = "0.0.0"
 
 [dependencies]
-cortex-m = "0.7.3"
-cortex-m-rt = "0.7.1"
+cortex-m = {version = "0.7.6", features = ["critical-section-single-core"]}
+cortex-m-rt = "0.7.2"
 dk = { path = "../../boards/dk", features = ["beginner"] }
-heapless = "0.7.9"
+heapless = "0.7.16"
 panic-probe = { version = "0.3.0", features = ["print-defmt"] }
-defmt = "0.3.0"
-defmt-rtt = "0.3.1"
+defmt = "0.3.2"
+defmt-rtt = "0.3.2"
 
 # optimize code in both profiles
 [profile.dev]