diff --git a/CHANGELOG.md b/CHANGELOG.md
index 545b30c..b94d38f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 <!-- next-header -->
 ## [Unreleased] - ReleaseDate
+### Changed
+
+* Updated to `defmt` 1.0 (non-breaking change, backwards compatible with 0.3 through semver trick)
 
 ## [1.0.0] - 2024-10-13
 ### Added
diff --git a/Cargo.toml b/Cargo.toml
index e63c676..1b0a3ce 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,7 @@ keywords = ["adafruit", "bluefruit", "bluetooth", "protocol"]
 license = "MIT OR Apache-2.0"
 
 [dependencies]
-defmt = { version = "0.3", optional = true }
+defmt = { version = "1.0", optional = true }
 
 rgb = { version = "0.8", optional = true }
 serde = { version = "1.0", features = ["derive"], optional = true }
diff --git a/examples/stm32f4-event-printer/Cargo.lock b/examples/stm32f4-event-printer/Cargo.lock
index be7b77b..f89db7e 100644
--- a/examples/stm32f4-event-printer/Cargo.lock
+++ b/examples/stm32f4-event-printer/Cargo.lock
@@ -1,6 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
+version = 4
 
 [[package]]
 name = "adafruit-bluefruit-protocol"
@@ -72,22 +72,22 @@ dependencies = [
 
 [[package]]
 name = "cortex-m-rt"
-version = "0.7.3"
+version = "0.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee84e813d593101b1723e13ec38b6ab6abbdbaaa4546553f5395ed274079ddb1"
+checksum = "801d4dec46b34c299ccf6b036717ae0fce602faa4f4fe816d9013b9a7c9f5ba6"
 dependencies = [
  "cortex-m-rt-macros",
 ]
 
 [[package]]
 name = "cortex-m-rt-macros"
-version = "0.7.0"
+version = "0.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0f6f3e36f203cfedbc78b357fb28730aa2c6dc1ab060ee5c2405e843988d3c7"
+checksum = "e37549a379a9e0e6e576fd208ee60394ccb8be963889eebba3ffe0980364f472"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 1.0.109",
+ "syn 2.0.100",
 ]
 
 [[package]]
@@ -120,15 +120,15 @@ dependencies = [
 
 [[package]]
 name = "critical-section"
-version = "1.1.3"
+version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f64009896348fc5af4222e9cf7d7d82a95a256c634ebcf61c53e4ea461422242"
+checksum = "790eea4361631c5e7d22598ecd5723ff611904e3344ce8720784c93e3d83d40b"
 
 [[package]]
 name = "defmt"
-version = "0.3.8"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a99dd22262668b887121d4672af5a64b238f026099f1a2a1b322066c9ecfe9e0"
+checksum = "548d977b6da32fa1d1fda2876453da1e7df63ad0304c8b3dae4dbe7b96f39b78"
 dependencies = [
  "bitflags",
  "defmt-macros",
@@ -136,31 +136,31 @@ dependencies = [
 
 [[package]]
 name = "defmt-macros"
-version = "0.3.9"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e3a9f309eff1f79b3ebdf252954d90ae440599c26c2c553fe87a2d17195f2dcb"
+checksum = "3d4fc12a85bcf441cfe44344c4b72d58493178ce635338a3f3b78943aceb258e"
 dependencies = [
  "defmt-parser",
- "proc-macro-error",
+ "proc-macro-error2",
  "proc-macro2",
  "quote",
- "syn 2.0.79",
+ "syn 2.0.100",
 ]
 
 [[package]]
 name = "defmt-parser"
-version = "0.3.4"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ff4a5fefe330e8d7f31b16a318f9ce81000d8e35e69b93eae154d16d2278f70f"
+checksum = "10d60334b3b2e7c9d91ef8150abfb6fa4c1c39ebbcf4a81c2e346aad939fee3e"
 dependencies = [
  "thiserror",
 ]
 
 [[package]]
 name = "defmt-rtt"
-version = "0.4.1"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bab697b3dbbc1750b7c8b821aa6f6e7f2480b47a99bc057a2ed7b170ebef0c51"
+checksum = "b2cac3b8a5644a9e02b75085ebad3b6deafdbdbdec04bb25086523828aa4dfd1"
 dependencies = [
  "critical-section",
  "defmt",
@@ -168,9 +168,9 @@ dependencies = [
 
 [[package]]
 name = "deranged"
-version = "0.3.11"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b42b6fa04a440b495c8b04d0e71b707c585f83cb9cb28cf8cd0d976c315e31b4"
+checksum = "9c9e6a11ca8224451684bc0d7d5a7adbf8f2fd6887261a1cfc3c0432f9d4068e"
 dependencies = [
  "powerfmt",
 ]
@@ -218,22 +218,22 @@ checksum = "a21dea9854beb860f3062d10228ce9b976da520a73474aed3171ec276bc0c032"
 
 [[package]]
 name = "enumflags2"
-version = "0.7.10"
+version = "0.7.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d232db7f5956f3f14313dc2f87985c58bd2c695ce124c8cdd984e08e15ac133d"
+checksum = "ba2f4b465f5318854c6f8dd686ede6c0a9dc67d4b1ac241cf0eb51521a309147"
 dependencies = [
  "enumflags2_derive",
 ]
 
 [[package]]
 name = "enumflags2_derive"
-version = "0.7.10"
+version = "0.7.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "de0d48a183585823424a4ce1aa132d174a6a81bd540895822eb4c8373a8e49e8"
+checksum = "fc4caf64a58d7a6d65ab00639b046ff54399a39f5f2554728895ace4b297cd79"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.79",
+ "syn 2.0.100",
 ]
 
 [[package]]
@@ -332,9 +332,9 @@ checksum = "51d515d32fb182ee37cda2ccdcb92950d6a3c2893aa280e540671c2cd0f3b1d9"
 
 [[package]]
 name = "panic-probe"
-version = "0.3.2"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4047d9235d1423d66cc97da7d07eddb54d4f154d6c13805c6d0793956f4f25b0"
+checksum = "fd402d00b0fb94c5aee000029204a46884b1262e0c443f166d86d2c0747e1a1a"
 dependencies = [
  "cortex-m",
  "defmt",
@@ -370,20 +370,42 @@ dependencies = [
  "version_check",
 ]
 
+[[package]]
+name = "proc-macro-error-attr2"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "96de42df36bb9bba5542fe9f1a054b8cc87e172759a1868aa05c1f3acc89dfc5"
+dependencies = [
+ "proc-macro2",
+ "quote",
+]
+
+[[package]]
+name = "proc-macro-error2"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "11ec05c52be0a07b08061f7dd003e7d7092e0472bc731b4af7bb1ef876109802"
+dependencies = [
+ "proc-macro-error-attr2",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.100",
+]
+
 [[package]]
 name = "proc-macro2"
-version = "1.0.87"
+version = "1.0.94"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b3e4daa0dcf6feba26f985457cdf104d4b4256fc5a09547140f3631bb076b19a"
+checksum = "a31971752e70b8b2686d7e46ec17fb38dad4051d94024c88df49b667caea9c84"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.37"
+version = "1.0.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b5b9d34b8991d19d98081b46eacdd8eb58c6f2b201139f7c5f643cc155a633af"
+checksum = "1885c039570dc00dcb4ff087a89e185fd56bae234ddc7f056a945bf36467248d"
 dependencies = [
  "proc-macro2",
 ]
@@ -433,7 +455,7 @@ version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cfcb3a22ef46e85b45de6ee7e79d063319ebb6594faafcf1c225ea92ab6e9b92"
 dependencies = [
- "semver 1.0.23",
+ "semver 1.0.26",
 ]
 
 [[package]]
@@ -453,9 +475,9 @@ dependencies = [
 
 [[package]]
 name = "semver"
-version = "1.0.23"
+version = "1.0.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "61697e0a1c7e512e84a621326239844a24d8207b4669b41bc18b32ea5cbf988b"
+checksum = "56e6fa9c48d24d85fb3de5ad847117517440f6beceb7798af16b4a87d616b8d0"
 
 [[package]]
 name = "semver-parser"
@@ -544,9 +566,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.79"
+version = "2.0.100"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "89132cd0bf050864e1d38dc3bbc07a0eb8e7530af26344d3d2bbbef83499f590"
+checksum = "b09a44accad81e1ba1cd74a32461ba89dee89095ba17b32f5d03683b1b1fc2a0"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -566,29 +588,29 @@ dependencies = [
 
 [[package]]
 name = "thiserror"
-version = "1.0.64"
+version = "2.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d50af8abc119fb8bb6dbabcfa89656f46f84aa0ac7688088608076ad2b459a84"
+checksum = "567b8a2dae586314f7be2a752ec7474332959c6460e02bde30d702a66d488708"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.64"
+version = "2.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "08904e7672f5eb876eaaf87e0ce17857500934f4981c4a0ab2b4aa98baac7fc3"
+checksum = "7f7cf42b4507d8ea322120659672cf1b9dbb93f8f2d4ecfd6e51350ff5b17a1d"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.79",
+ "syn 2.0.100",
 ]
 
 [[package]]
 name = "time"
-version = "0.3.36"
+version = "0.3.41"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5dfd88e563464686c916c7e46e623e520ddc6d79fa6641390f2e3fa86e83e885"
+checksum = "8a7619e19bc266e0f9c5e6686659d394bc57973859340060a69221e57dbc0c40"
 dependencies = [
  "deranged",
  "num-conv",
@@ -598,15 +620,15 @@ dependencies = [
 
 [[package]]
 name = "time-core"
-version = "0.1.2"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ef927ca75afb808a4d64dd374f00a2adf8d0fcff8e7b184af886c3c87ec4a3f3"
+checksum = "c9e9a38711f559d9e3ce1cdb06dd7c5b8ea546bc90052da6d06bb76da74bb07c"
 
 [[package]]
 name = "unicode-ident"
-version = "1.0.13"
+version = "1.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e91b56cd4cadaeb79bbf1a5645f6b4f8dc5bde8834ad5894a8db35fda9efa1fe"
+checksum = "5a5f39404a5da50712a4c1eecf25e90dd62b613502b7e925fd4e4d19b5c96512"
 
 [[package]]
 name = "vcell"
diff --git a/examples/stm32f4-event-printer/Cargo.toml b/examples/stm32f4-event-printer/Cargo.toml
index d14a281..9842da7 100644
--- a/examples/stm32f4-event-printer/Cargo.toml
+++ b/examples/stm32f4-event-printer/Cargo.toml
@@ -7,14 +7,14 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 cortex-m = { version = "0.7", features = ["critical-section-single-core"]}
 cortex-m-rtic = "1.1.4"
-panic-probe = { version = "0.3", features = ["print-defmt"] }
+panic-probe = { version = "1.0", features = ["print-defmt"] }
 
 stm32f4xx-hal = { version = "0.19", features = ["stm32f401", "rtic", "rtic-monotonic"] }
 
 fugit = "0.3"
 
-defmt = "0.3.6"
-defmt-rtt = "0.4"
+defmt = "1.0"
+defmt-rtt = "1.0"
 
 # use `adafruit-bluefruit-protocol = "0.1"` in reality; path used here to ensure that the example always compiles against the latest master
 adafruit-bluefruit-protocol = { path = "../..", features = ["defmt"] }