diff --git a/.dockerignore b/.dockerignore
index 1339d33..ca5d543 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -1,6 +1,6 @@
 # THIS FILE WAS AUTOMATICALLY GENERATED, PLEASE DO NOT EDIT.
 #
-# Generated on 2023-03-02T13:41:04Z by kres latest.
+# Generated on 2023-03-17T16:37:39Z by kres 6bde0cc.
 
 *
 !kmsg.go
@@ -8,7 +8,8 @@
 !message_test.go
 !reader.go
 !reader_test.go
-!utils.go
+!utils_bsd.go
+!utils_linux.go
 !writer.go
 !writer_test.go
 !go.mod
diff --git a/Dockerfile b/Dockerfile
index edb2ac9..d04aa82 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@
 
 # THIS FILE WAS AUTOMATICALLY GENERATED, PLEASE DO NOT EDIT.
 #
-# Generated on 2023-03-02T13:41:04Z by kres latest.
+# Generated on 2023-03-17T16:37:39Z by kres 6bde0cc.
 
 ARG TOOLCHAIN
 
@@ -55,7 +55,8 @@ COPY ./message.go ./message.go
 COPY ./message_test.go ./message_test.go
 COPY ./reader.go ./reader.go
 COPY ./reader_test.go ./reader_test.go
-COPY ./utils.go ./utils.go
+COPY ./utils_bsd.go ./utils_bsd.go
+COPY ./utils_linux.go ./utils_linux.go
 COPY ./writer.go ./writer.go
 COPY ./writer_test.go ./writer_test.go
 RUN --mount=type=cache,target=/go/pkg go list -mod=readonly all >/dev/null
diff --git a/Makefile b/Makefile
index 2910a99..8995ab4 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 # THIS FILE WAS AUTOMATICALLY GENERATED, PLEASE DO NOT EDIT.
 #
-# Generated on 2023-03-02T13:41:04Z by kres latest.
+# Generated on 2023-03-17T16:37:39Z by kres 6bde0cc.
 
 # common variables
 
@@ -16,10 +16,10 @@ REGISTRY_AND_USERNAME ?= $(REGISTRY)/$(USERNAME)
 GOLANGCILINT_VERSION ?= v1.51.2
 GOFUMPT_VERSION ?= v0.4.0
 GO_VERSION ?= 1.20
-GOIMPORTS_VERSION ?= v0.6.0
+GOIMPORTS_VERSION ?= v0.7.0
 PROTOBUF_GO_VERSION ?= 1.28.1
-GRPC_GO_VERSION ?= 1.2.0
-GRPC_GATEWAY_VERSION ?= 2.15.1
+GRPC_GO_VERSION ?= 1.3.0
+GRPC_GATEWAY_VERSION ?= 2.15.2
 VTPROTOBUF_VERSION ?= 0.4.0
 DEEPCOPY_VERSION ?= v0.5.5
 GO_BUILDFLAGS ?=
diff --git a/utils_bsd.go b/utils_bsd.go
new file mode 100644
index 0000000..5a9bd86
--- /dev/null
+++ b/utils_bsd.go
@@ -0,0 +1,23 @@
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+//go:build darwin || dragonfly || freebsd || netbsd || openbsd
+
+package kmsg
+
+import (
+	"fmt"
+	"time"
+
+	"golang.org/x/sys/unix"
+)
+
+func getBootTime() (time.Time, error) {
+	timeval, err := unix.SysctlTimeval("kern.boottime")
+	if err != nil {
+		return time.Time{}, fmt.Errorf("could not get boot time: %w", err)
+	}
+
+	return time.Unix(timeval.Unix()), nil
+}
diff --git a/utils.go b/utils_linux.go
similarity index 82%
rename from utils.go
rename to utils_linux.go
index 8c1aa3a..db3aec0 100644
--- a/utils.go
+++ b/utils_linux.go
@@ -2,18 +2,21 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
+//go:build linux
+
 package kmsg
 
 import (
 	"fmt"
-	"syscall"
 	"time"
+
+	"golang.org/x/sys/unix"
 )
 
 func getBootTime() (time.Time, error) {
-	var sysinfo syscall.Sysinfo_t
+	var sysinfo unix.Sysinfo_t
 
-	err := syscall.Sysinfo(&sysinfo)
+	err := unix.Sysinfo(&sysinfo)
 	if err != nil {
 		return time.Time{}, fmt.Errorf("could not get boot time: %w", err)
 	}