diff --git a/src/exercises/bare-metal/rtc/Cargo.lock b/src/exercises/bare-metal/rtc/Cargo.lock
index 17c811c6871b..937d5066827f 100644
--- a/src/exercises/bare-metal/rtc/Cargo.lock
+++ b/src/exercises/bare-metal/rtc/Cargo.lock
@@ -28,7 +28,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c044ecf8760dd8ee5aa92c49cf7534942d289fb1f0247af92b5fbab8ab18a912"
 dependencies = [
  "bitflags",
- "safe-mmio",
+ "safe-mmio 0.2.7",
  "thiserror",
  "zerocopy",
 ]
@@ -42,7 +42,7 @@ dependencies = [
  "bitflags",
  "embedded-hal-nb",
  "embedded-io",
- "safe-mmio",
+ "safe-mmio 0.2.7",
  "thiserror",
  "zerocopy",
 ]
@@ -150,7 +150,7 @@ dependencies = [
  "bitflags",
  "chrono",
  "log",
- "safe-mmio",
+ "safe-mmio 0.3.0",
  "smccc",
  "spin",
  "zerocopy",
@@ -165,6 +165,15 @@ dependencies = [
  "zerocopy",
 ]
 
+[[package]]
+name = "safe-mmio"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4813ee49326057f105d6d8ca3d8f9265095f26aa7b42094e487028403a594f4c"
+dependencies = [
+ "zerocopy",
+]
+
 [[package]]
 name = "scopeguard"
 version = "1.2.0"
diff --git a/src/exercises/bare-metal/rtc/Cargo.toml b/src/exercises/bare-metal/rtc/Cargo.toml
index dfaf6bc7513c..bb96f8d7a514 100644
--- a/src/exercises/bare-metal/rtc/Cargo.toml
+++ b/src/exercises/bare-metal/rtc/Cargo.toml
@@ -14,7 +14,7 @@ arm-pl011-uart = "0.4.0"
 bitflags = "2.11.0"
 chrono = { version = "0.4.44", default-features = false }
 log = "0.4.29"
-safe-mmio = "0.2.7"
+safe-mmio = "0.3.0"
 smccc = "0.2.2"
 spin = "0.10.0"
 zerocopy = "0.8.48"