diff --git a/boot/zcbor/include/zcbor_print.h b/boot/zcbor/include/zcbor_print.h
index 22a5637d3..ef3bc1d73 100644
--- a/boot/zcbor/include/zcbor_print.h
+++ b/boot/zcbor/include/zcbor_print.h
@@ -73,17 +73,17 @@ do { \
 #endif
 
 __attribute__((used))
-static void zcbor_print_compare_lines(const uint8_t *str1, const uint8_t *str2, uint32_t size)
+static void zcbor_print_compare_lines(const uint8_t *str1, const uint8_t *str2, size_t size)
 {
-	for (uint32_t j = 0; j < size; j++) {
+	for (size_t j = 0; j < size; j++) {
 		zcbor_do_print("%x ", str1[j]);
 	}
 	zcbor_do_print("\r\n");
-	for (uint32_t j = 0; j < size; j++) {
+	for (size_t j = 0; j < size; j++) {
 		zcbor_do_print("%x ", str2[j]);
 	}
 	zcbor_do_print("\r\n");
-	for (uint32_t j = 0; j < size; j++) {
+	for (size_t j = 0; j < size; j++) {
 		zcbor_do_print("%x ", str1[j] != str2[j]);
 	}
 	zcbor_do_print("\r\n");
@@ -91,10 +91,10 @@ static void zcbor_print_compare_lines(const uint8_t *str1, const uint8_t *str2,
 }
 
 __attribute__((used))
-static void zcbor_print_compare_strings(const uint8_t *str1, const uint8_t *str2, uint32_t size)
+static void zcbor_print_compare_strings(const uint8_t *str1, const uint8_t *str2, size_t size)
 {
-	for (uint32_t i = 0; i <= size / 16; i++) {
-		zcbor_do_print("line %d (char %d)\r\n", i, i*16);
+	for (size_t i = 0; i <= size / 16; i++) {
+		zcbor_do_print("line %zu (char %zu)\r\n", i, i*16);
 		zcbor_print_compare_lines(&str1[i*16], &str2[i*16],
 			MIN(16, (size - i*16)));
 	}
@@ -102,12 +102,12 @@ static void zcbor_print_compare_strings(const uint8_t *str1, const uint8_t *str2
 }
 
 __attribute__((used))
-static void zcbor_print_compare_strings_diff(const uint8_t *str1, const uint8_t *str2, uint32_t size)
+static void zcbor_print_compare_strings_diff(const uint8_t *str1, const uint8_t *str2, size_t size)
 {
 	bool printed = false;
-	for (uint32_t i = 0; i <= size / 16; i++) {
+	for (size_t i = 0; i <= size / 16; i++) {
 		if (memcmp(&str1[i*16], &str2[i*16], MIN(16, (size - i*16))) != 0) {
-			zcbor_do_print("line %d (char %d)\r\n", i, i*16);
+			zcbor_do_print("line %zu (char %zu)\r\n", i, i*16);
 			zcbor_print_compare_lines(&str1[i*16], &str2[i*16],
 				MIN(16, (size - i*16)));
 			printed = true;
diff --git a/boot/zcbor/src/zcbor_common.c b/boot/zcbor/src/zcbor_common.c
index f1a039e52..a7c9ee7be 100644
--- a/boot/zcbor/src/zcbor_common.c
+++ b/boot/zcbor/src/zcbor_common.c
@@ -355,14 +355,19 @@ float zcbor_float16_to_32(uint16_t input)
 				: (expo + (F32_BIAS - F16_BIAS));
 		uint32_t value32 = (sign << F32_SIGN_OFFS) | (new_expo << F32_EXPO_OFFS)
 			| (mantissa << (F32_EXPO_OFFS - F16_EXPO_OFFS));
-		return *(float *)&value32;
+		float result;
+
+		memcpy(&result, &value32, sizeof(result));
+		return result;
 	}
 }
 
 
 uint16_t zcbor_float32_to_16(float input)
 {
-	uint32_t value32 = *(uint32_t *)&input;
+	uint32_t value32;
+
+	memcpy(&value32, &input, sizeof(value32));
 
 	uint32_t sign = value32 >> F32_SIGN_OFFS;
 	uint32_t expo = (value32 >> F32_EXPO_OFFS) & F32_EXPO_MSK;
@@ -370,8 +375,10 @@ uint16_t zcbor_float32_to_16(float input)
 
 	uint16_t value16 = (uint16_t)(sign << F16_SIGN_OFFS);
 
+	uint32_t abs_value32 = value32 & ~(1 << F32_SIGN_OFFS);
 	float abs_input;
-	*(uint32_t *)&abs_input = value32 & ~(1 << F32_SIGN_OFFS);
+
+	memcpy(&abs_input, &abs_value32, sizeof(abs_input));
 
 	if (abs_input <= (F16_MIN / 2)) {
 		/* 0 or too small for float16. Round down to 0. value16 is already correct. */