diff --git a/include/ds3231/ds3231.hpp b/include/ds3231/ds3231.hpp
index bd9d8b3..4f8a269 100644
--- a/include/ds3231/ds3231.hpp
+++ b/include/ds3231/ds3231.hpp
@@ -81,7 +81,7 @@ constexpr std::uint8_t hours_from_reg(std::uint8_t reg)
 // this maps Sunday to 1.
 constexpr std::uint8_t weekday(std::uint16_t year, std::uint8_t month, std::uint8_t day)
 {
-	constexpr std::uint8_t offsets[]{0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4};
+	static constexpr auto offsets = std::to_array<std::uint8_t>({0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4});
 	if (month < 3) {
 		--year;
 	}
@@ -151,34 +151,32 @@ class device {
 
 	[[nodiscard]] static status write_clock(const date_time &now)
 	{
-		std::array<std::uint8_t, 7> raw{detail::to_bcd(now.second),
-		                                detail::to_bcd(now.minute),
-		                                detail::to_bcd(now.hour),
-		                                SetWeekday ? detail::weekday(now.year, now.month, now.day) : std::uint8_t{1},
-		                                detail::to_bcd(now.day),
-		                                detail::to_bcd(now.month),
-		                                detail::to_bcd(static_cast<std::uint8_t>(now.year % 100))};
+		std::array raw{detail::to_bcd(now.second),
+		               detail::to_bcd(now.minute),
+		               detail::to_bcd(now.hour),
+		               SetWeekday ? detail::weekday(now.year, now.month, now.day) : std::uint8_t{1},
+		               detail::to_bcd(now.day),
+		               detail::to_bcd(now.month),
+		               detail::to_bcd(static_cast<std::uint8_t>(now.year % 100))};
 		return dev::write_regs(reg_clock, raw);
 	}
 
 	[[nodiscard]] static status write_date(const date &value)
 	{
 		if constexpr (SetWeekday) {
-			std::array<std::uint8_t, 4> raw{detail::weekday(value.year, value.month, value.day),
-			                                detail::to_bcd(value.day), detail::to_bcd(value.month),
-			                                detail::to_bcd(static_cast<std::uint8_t>(value.year % 100))};
+			std::array raw{detail::weekday(value.year, value.month, value.day), detail::to_bcd(value.day),
+			               detail::to_bcd(value.month), detail::to_bcd(static_cast<std::uint8_t>(value.year % 100))};
 			return dev::write_regs(reg_clock + 3, raw);
 		} else {
-			std::array<std::uint8_t, 3> raw{detail::to_bcd(value.day), detail::to_bcd(value.month),
-			                                detail::to_bcd(static_cast<std::uint8_t>(value.year % 100))};
+			std::array raw{detail::to_bcd(value.day), detail::to_bcd(value.month),
+			               detail::to_bcd(static_cast<std::uint8_t>(value.year % 100))};
 			return dev::write_regs(reg_clock + 4, raw);
 		}
 	}
 
 	[[nodiscard]] static status write_time(const time_of_day &value)
 	{
-		std::array<std::uint8_t, 3> raw{detail::to_bcd(value.second), detail::to_bcd(value.minute),
-		                                detail::to_bcd(value.hour)};
+		std::array raw{detail::to_bcd(value.second), detail::to_bcd(value.minute), detail::to_bcd(value.hour)};
 		return dev::write_regs(reg_clock, raw);
 	}
 
@@ -187,12 +185,11 @@ class device {
 	[[nodiscard]] static status set_alarm1(const date_time &at, alarm1_rate rate, bool enable_interrupt = true)
 	{
 		auto m = static_cast<std::uint8_t>(rate);
-		std::array<std::uint8_t, 4> raw{
-		    static_cast<std::uint8_t>(detail::to_bcd(at.second) | ((m & 1) << 7)),
-		    static_cast<std::uint8_t>(detail::to_bcd(at.minute) | (((m >> 1) & 1) << 7)),
-		    static_cast<std::uint8_t>(detail::to_bcd(at.hour) | (((m >> 2) & 1) << 7)),
-		    static_cast<std::uint8_t>(day_date(at.day, rate == alarm1_rate::weekday_time_match) |
-		                              (((m >> 3) & 1) << 7))};
+		std::array raw{static_cast<std::uint8_t>(detail::to_bcd(at.second) | ((m & 1) << 7)),
+		               static_cast<std::uint8_t>(detail::to_bcd(at.minute) | (((m >> 1) & 1) << 7)),
+		               static_cast<std::uint8_t>(detail::to_bcd(at.hour) | (((m >> 2) & 1) << 7)),
+		               static_cast<std::uint8_t>(day_date(at.day, rate == alarm1_rate::weekday_time_match) |
+		                                         (((m >> 3) & 1) << 7))};
 		if (auto s = dev::write_regs(reg_alarm1, raw); !s) {
 			return s;
 		}
@@ -202,11 +199,10 @@ class device {
 	[[nodiscard]] static status set_alarm2(const date_time &at, alarm2_rate rate, bool enable_interrupt = true)
 	{
 		auto m = static_cast<std::uint8_t>(rate);
-		std::array<std::uint8_t, 3> raw{
-		    static_cast<std::uint8_t>(detail::to_bcd(at.minute) | ((m & 1) << 7)),
-		    static_cast<std::uint8_t>(detail::to_bcd(at.hour) | (((m >> 1) & 1) << 7)),
-		    static_cast<std::uint8_t>(day_date(at.day, rate == alarm2_rate::weekday_time_match) |
-		                              (((m >> 2) & 1) << 7))};
+		std::array raw{static_cast<std::uint8_t>(detail::to_bcd(at.minute) | ((m & 1) << 7)),
+		               static_cast<std::uint8_t>(detail::to_bcd(at.hour) | (((m >> 1) & 1) << 7)),
+		               static_cast<std::uint8_t>(day_date(at.day, rate == alarm2_rate::weekday_time_match) |
+		                                         (((m >> 2) & 1) << 7))};
 		if (auto s = dev::write_regs(reg_alarm2, raw); !s) {
 			return s;
 		}
diff --git a/libavr b/libavr
index 07a0c40..4c7d4d6 160000
--- a/libavr
+++ b/libavr
@@ -1 +1 @@
-Subproject commit 07a0c4023564eb4bd72e33ff84399105390716e9
+Subproject commit 4c7d4d6ff3af35dc1593a7311a91a1410578e978