diff --git a/examples/rust-gcoap/Cargo.lock b/examples/rust-gcoap/Cargo.lock
index c6d1346a73a0d..dc7dd06f48ac0 100644
--- a/examples/rust-gcoap/Cargo.lock
+++ b/examples/rust-gcoap/Cargo.lock
@@ -273,9 +273,9 @@ dependencies = [
 
 [[package]]
 name = "cstr_core"
-version = "0.2.4"
+version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "917ba9efe9e1e736671d5a03f006afc4e7e3f32503e2077e0bcaf519c0c8c1d3"
+checksum = "644828c273c063ab0d39486ba42a5d1f3a499d35529c759e763a9c6cb8a0fb08"
 dependencies = [
  "cty",
  "memchr",
@@ -354,6 +354,7 @@ checksum = "7e476c64197665c3725621f0ac3f9e5209aa5e889e02a08b1daf5f16dc5fd952"
 dependencies = [
  "atomic-polyfill",
  "hash32",
+ "serde",
  "spin",
  "stable_deref_trait",
 ]
@@ -368,10 +369,10 @@ dependencies = [
 ]
 
 [[package]]
-name = "hex-noalloc"
-version = "0.3.2-post1"
+name = "hex"
+version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "58c0cd4ee9378ce1919b8b8da4e80ce6b9205ec21f5a667b61a6dbb867c31d09"
+checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
 
 [[package]]
 name = "humantime"
@@ -405,9 +406,9 @@ checksum = "1b03d17f364a3a042d5e5d46b053bbbf82c92c9430c592dd4c064dc6ee997125"
 
 [[package]]
 name = "libloading"
-version = "0.7.2"
+version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "afe203d669ec979b7128619bae5a63b7b42e9203c1b29146079ee05e2f604b52"
+checksum = "efbc0f03f9a775e9f6aed295c6a1ba2253c5757a9e03d55c6caa46a681abcddd"
 dependencies = [
  "cfg-if",
  "winapi",
@@ -534,7 +535,7 @@ checksum = "f497285884f3fcff424ffc933e56d7cbca511def0c9831a7f9b5f6153e3cc89b"
 [[package]]
 name = "riot-coap-handler-demos"
 version = "0.1.0"
-source = "git+https://gitlab.com/etonomy/riot-module-examples/#31acf76fb82620f65977887ee49df31f69499691"
+source = "git+https://gitlab.com/etonomy/riot-module-examples/#db25c179dd511ae2556d0ef652432450f9c4283d"
 dependencies = [
  "coap-handler",
  "coap-handler-implementations",
@@ -552,8 +553,8 @@ dependencies = [
 
 [[package]]
 name = "riot-sys"
-version = "0.6.1"
-source = "git+https://gitlab.com/etonomy/riot-sys#c114afd40c9a8e1a966fd229ff644313aff0dc9e"
+version = "0.7.0"
+source = "git+https://gitlab.com/etonomy/riot-sys#1fffac33bb426bb8041e52d587d527db52db7562"
 dependencies = [
  "bindgen",
  "c2rust-asm-casts",
@@ -568,8 +569,8 @@ dependencies = [
 
 [[package]]
 name = "riot-wrappers"
-version = "0.7.13"
-source = "git+https://gitlab.com/etonomy/riot-wrappers#a54f1b2eef2d6059e70ae96a3e26737d42221e9f"
+version = "0.7.15"
+source = "git+https://gitlab.com/etonomy/riot-wrappers#49528d696022c7a200681f4898899e5c4d06ad69"
 dependencies = [
  "bare-metal 1.0.0",
  "coap-handler",
@@ -579,7 +580,7 @@ dependencies = [
  "embedded-graphics",
  "embedded-hal",
  "heapless",
- "hex-noalloc",
+ "hex",
  "mutex-trait",
  "nb 0.1.3",
  "num-traits",
@@ -702,9 +703,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.74"
+version = "1.0.75"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee2bb9cd061c5865d345bb02ca49fcef1391741b672b54a0bf7b679badec3142"
+checksum = "c059c05b48c5c0067d4b4b2b4f0732dd65feb52daf7e0ea09cd87e7dadc1af79"
 dependencies = [
  "itoa",
  "ryu",
diff --git a/examples/rust-hello-world/Cargo.lock b/examples/rust-hello-world/Cargo.lock
index 442e926b85cbb..8318ab99a75de 100644
--- a/examples/rust-hello-world/Cargo.lock
+++ b/examples/rust-hello-world/Cargo.lock
@@ -202,9 +202,9 @@ dependencies = [
 
 [[package]]
 name = "cstr_core"
-version = "0.2.4"
+version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "917ba9efe9e1e736671d5a03f006afc4e7e3f32503e2077e0bcaf519c0c8c1d3"
+checksum = "644828c273c063ab0d39486ba42a5d1f3a499d35529c759e763a9c6cb8a0fb08"
 dependencies = [
  "cty",
  "memchr",
@@ -291,10 +291,10 @@ dependencies = [
 ]
 
 [[package]]
-name = "hex-noalloc"
-version = "0.3.2-post1"
+name = "hex"
+version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "58c0cd4ee9378ce1919b8b8da4e80ce6b9205ec21f5a667b61a6dbb867c31d09"
+checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
 
 [[package]]
 name = "humantime"
@@ -328,9 +328,9 @@ checksum = "1b03d17f364a3a042d5e5d46b053bbbf82c92c9430c592dd4c064dc6ee997125"
 
 [[package]]
 name = "libloading"
-version = "0.7.2"
+version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "afe203d669ec979b7128619bae5a63b7b42e9203c1b29146079ee05e2f604b52"
+checksum = "efbc0f03f9a775e9f6aed295c6a1ba2253c5757a9e03d55c6caa46a681abcddd"
 dependencies = [
  "cfg-if",
  "winapi",
@@ -456,8 +456,8 @@ checksum = "f497285884f3fcff424ffc933e56d7cbca511def0c9831a7f9b5f6153e3cc89b"
 
 [[package]]
 name = "riot-sys"
-version = "0.6.1"
-source = "git+https://gitlab.com/etonomy/riot-sys#c114afd40c9a8e1a966fd229ff644313aff0dc9e"
+version = "0.7.0"
+source = "git+https://gitlab.com/etonomy/riot-sys#1fffac33bb426bb8041e52d587d527db52db7562"
 dependencies = [
  "bindgen",
  "c2rust-asm-casts",
@@ -472,15 +472,15 @@ dependencies = [
 
 [[package]]
 name = "riot-wrappers"
-version = "0.7.13"
-source = "git+https://gitlab.com/etonomy/riot-wrappers#a54f1b2eef2d6059e70ae96a3e26737d42221e9f"
+version = "0.7.15"
+source = "git+https://gitlab.com/etonomy/riot-wrappers#49528d696022c7a200681f4898899e5c4d06ad69"
 dependencies = [
  "bare-metal 1.0.0",
  "cstr_core",
  "embedded-graphics",
  "embedded-hal",
  "heapless",
- "hex-noalloc",
+ "hex",
  "mutex-trait",
  "nb 0.1.3",
  "num-traits",
@@ -581,9 +581,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.74"
+version = "1.0.75"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee2bb9cd061c5865d345bb02ca49fcef1391741b672b54a0bf7b679badec3142"
+checksum = "c059c05b48c5c0067d4b4b2b4f0732dd65feb52daf7e0ea09cd87e7dadc1af79"
 dependencies = [
  "itoa",
  "ryu",
diff --git a/tests/rust_minimal/Cargo.lock b/tests/rust_minimal/Cargo.lock
index 00ea5616af8cf..a8eec272d2415 100644
--- a/tests/rust_minimal/Cargo.lock
+++ b/tests/rust_minimal/Cargo.lock
@@ -202,9 +202,9 @@ dependencies = [
 
 [[package]]
 name = "cstr_core"
-version = "0.2.4"
+version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "917ba9efe9e1e736671d5a03f006afc4e7e3f32503e2077e0bcaf519c0c8c1d3"
+checksum = "644828c273c063ab0d39486ba42a5d1f3a499d35529c759e763a9c6cb8a0fb08"
 dependencies = [
  "cty",
  "memchr",
@@ -291,10 +291,10 @@ dependencies = [
 ]
 
 [[package]]
-name = "hex-noalloc"
-version = "0.3.2-post1"
+name = "hex"
+version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "58c0cd4ee9378ce1919b8b8da4e80ce6b9205ec21f5a667b61a6dbb867c31d09"
+checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
 
 [[package]]
 name = "humantime"
@@ -328,9 +328,9 @@ checksum = "1b03d17f364a3a042d5e5d46b053bbbf82c92c9430c592dd4c064dc6ee997125"
 
 [[package]]
 name = "libloading"
-version = "0.7.2"
+version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "afe203d669ec979b7128619bae5a63b7b42e9203c1b29146079ee05e2f604b52"
+checksum = "efbc0f03f9a775e9f6aed295c6a1ba2253c5757a9e03d55c6caa46a681abcddd"
 dependencies = [
  "cfg-if",
  "winapi",
@@ -456,8 +456,8 @@ checksum = "f497285884f3fcff424ffc933e56d7cbca511def0c9831a7f9b5f6153e3cc89b"
 
 [[package]]
 name = "riot-sys"
-version = "0.6.1"
-source = "git+https://gitlab.com/etonomy/riot-sys#c114afd40c9a8e1a966fd229ff644313aff0dc9e"
+version = "0.7.0"
+source = "git+https://gitlab.com/etonomy/riot-sys#1fffac33bb426bb8041e52d587d527db52db7562"
 dependencies = [
  "bindgen",
  "c2rust-asm-casts",
@@ -472,15 +472,15 @@ dependencies = [
 
 [[package]]
 name = "riot-wrappers"
-version = "0.7.13"
-source = "git+https://gitlab.com/etonomy/riot-wrappers#a54f1b2eef2d6059e70ae96a3e26737d42221e9f"
+version = "0.7.15"
+source = "git+https://gitlab.com/etonomy/riot-wrappers#49528d696022c7a200681f4898899e5c4d06ad69"
 dependencies = [
  "bare-metal 1.0.0",
  "cstr_core",
  "embedded-graphics",
  "embedded-hal",
  "heapless",
- "hex-noalloc",
+ "hex",
  "mutex-trait",
  "nb 0.1.3",
  "num-traits",
@@ -581,9 +581,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.74"
+version = "1.0.75"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee2bb9cd061c5865d345bb02ca49fcef1391741b672b54a0bf7b679badec3142"
+checksum = "c059c05b48c5c0067d4b4b2b4f0732dd65feb52daf7e0ea09cd87e7dadc1af79"
 dependencies = [
  "itoa",
  "ryu",