diff --git a/cmd/tx-submit-api-mirror/main.go b/cmd/tx-submit-api-mirror/main.go
index 8158d04..2b51e14 100644
--- a/cmd/tx-submit-api-mirror/main.go
+++ b/cmd/tx-submit-api-mirror/main.go
@@ -1,4 +1,4 @@
-// Copyright 2023 Blink Labs Software
+// Copyright 2024 Blink Labs Software
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -21,9 +21,9 @@ import (
 
 	_ "go.uber.org/automaxprocs"
 
-	"github.com/blinklabs-io/tx-submit-api-mirror/api"
-	"github.com/blinklabs-io/tx-submit-api-mirror/config"
-	"github.com/blinklabs-io/tx-submit-api-mirror/logging"
+	"github.com/blinklabs-io/tx-submit-api-mirror/internal/api"
+	"github.com/blinklabs-io/tx-submit-api-mirror/internal/config"
+	"github.com/blinklabs-io/tx-submit-api-mirror/internal/logging"
 )
 
 var cmdlineFlags struct {
diff --git a/api/api.go b/internal/api/api.go
similarity index 96%
rename from api/api.go
rename to internal/api/api.go
index 282740d..97373fe 100644
--- a/api/api.go
+++ b/internal/api/api.go
@@ -1,4 +1,4 @@
-// Copyright 2023 Blink Labs Software
+// Copyright 2024 Blink Labs Software
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -30,8 +30,8 @@ import (
 	ginzap "github.com/gin-contrib/zap"
 	"github.com/gin-gonic/gin"
 
-	"github.com/blinklabs-io/tx-submit-api-mirror/config"
-	"github.com/blinklabs-io/tx-submit-api-mirror/logging"
+	"github.com/blinklabs-io/tx-submit-api-mirror/internal/config"
+	"github.com/blinklabs-io/tx-submit-api-mirror/internal/logging"
 )
 
 func Start(cfg *config.Config) error {
diff --git a/api/api_test.go b/internal/api/api_test.go
similarity index 70%
rename from api/api_test.go
rename to internal/api/api_test.go
index 85207e4..4a3f32e 100644
--- a/api/api_test.go
+++ b/internal/api/api_test.go
@@ -1,3 +1,17 @@
+// Copyright 2024 Blink Labs Software
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package api
 
 import (
@@ -6,7 +20,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/blinklabs-io/tx-submit-api-mirror/config"
+	"github.com/blinklabs-io/tx-submit-api-mirror/internal/config"
 )
 
 func TestHTTPClientTimeout(t *testing.T) {
diff --git a/config/config.go b/internal/config/config.go
similarity index 98%
rename from config/config.go
rename to internal/config/config.go
index 54bd462..e79cf62 100644
--- a/config/config.go
+++ b/internal/config/config.go
@@ -1,4 +1,4 @@
-// Copyright 2023 Blink Labs Software
+// Copyright 2024 Blink Labs Software
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/logging/logging.go b/internal/logging/logging.go
similarity index 94%
rename from logging/logging.go
rename to internal/logging/logging.go
index 500f112..9c6edd0 100644
--- a/logging/logging.go
+++ b/internal/logging/logging.go
@@ -1,4 +1,4 @@
-// Copyright 2023 Blink Labs Software
+// Copyright 2024 Blink Labs Software
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -21,7 +21,7 @@ import (
 	"go.uber.org/zap"
 	"go.uber.org/zap/zapcore"
 
-	"github.com/blinklabs-io/tx-submit-api-mirror/config"
+	"github.com/blinklabs-io/tx-submit-api-mirror/internal/config"
 )
 
 type Logger = zap.SugaredLogger