diff --git a/src/exercises/bare-metal/rtc/Cargo.lock b/src/exercises/bare-metal/rtc/Cargo.lock
index 4556ba98..29150250 100644
--- a/src/exercises/bare-metal/rtc/Cargo.lock
+++ b/src/exercises/bare-metal/rtc/Cargo.lock
@@ -25,9 +25,9 @@ checksum = "b048fb63fd8b5923fc5aa7b340d8e156aec7ec02f0c78fa8a6ddc2613f6f71de"
 
 [[package]]
 name = "cc"
-version = "1.1.4"
+version = "1.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9711f33475c22aab363b05564a17d7b789bf3dfec5ebabb586adee56f0e271b5"
+checksum = "2aba8f4e9906c7ce3c73463f62a7f0c65183ada1a2d47e397cc8810827f9694f"
 
 [[package]]
 name = "chrono"
diff --git a/src/exercises/bare-metal/rtc/Cargo.toml b/src/exercises/bare-metal/rtc/Cargo.toml
index 7498d7f9..46007e2d 100644
--- a/src/exercises/bare-metal/rtc/Cargo.toml
+++ b/src/exercises/bare-metal/rtc/Cargo.toml
@@ -15,4 +15,4 @@ smccc = "0.1.1"
 spin = "0.9.8"
 
 [build-dependencies]
-cc = "1.1.4"
+cc = "1.1.6"