diff --git a/go.mod b/go.mod
index 8909e544..a888c07d 100644
--- a/go.mod
+++ b/go.mod
@@ -4,7 +4,7 @@ require (
 	github.com/derekparker/delve v1.1.0
 	github.com/google/go-cmp v0.2.0 // indirect
 	github.com/gorilla/websocket v1.4.0 // indirect
-	github.com/hhrutter/pdfcpu v0.1.18
+	github.com/hhrutter/pdfcpu v0.1.19
 	github.com/labstack/echo v0.0.0-20181123063703-c7eb8da9ec73
 	github.com/labstack/gommon v0.2.8
 	github.com/mafredri/cdp v0.20.0
diff --git a/go.sum b/go.sum
index a2e4ba8f..0b492280 100644
--- a/go.sum
+++ b/go.sum
@@ -10,6 +10,8 @@ github.com/gorilla/websocket v1.4.0 h1:WDFjx/TMzVgy9VdMMQi2K2Emtwi2QcUQsztZ/zLaH
 github.com/gorilla/websocket v1.4.0/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
 github.com/hhrutter/pdfcpu v0.1.18 h1:GX3d6tZxmQlmB5X9VUyOtx7+HZZpR+8ISLqBineP6dc=
 github.com/hhrutter/pdfcpu v0.1.18/go.mod h1:iaCmXGnOXPIvoGLELZZc4m/GpIopVsvLQ00thrbu8LU=
+github.com/hhrutter/pdfcpu v0.1.19 h1:J6GjNFDPjurQWallPW9gmz3CcNqBfvgB7Dad9T3e8Hc=
+github.com/hhrutter/pdfcpu v0.1.19/go.mod h1:iaCmXGnOXPIvoGLELZZc4m/GpIopVsvLQ00thrbu8LU=
 github.com/labstack/echo v0.0.0-20181123063703-c7eb8da9ec73 h1:oQvA3Xy8274W5Ldgo6Nogy4lX8XO5AaIBsjF5Ggk0IU=
 github.com/labstack/echo v0.0.0-20181123063703-c7eb8da9ec73/go.mod h1:rS0D1UPvC8/3sXjhSwEq+K1olh7ipbDhjDWATN2KSgA=
 github.com/labstack/echo v3.3.5+incompatible h1:9PfxPUmasKzeJor9uQTaXLT6WUG/r+vSTmvXxvv3JO4=
diff --git a/internal/pkg/printer/printer.go b/internal/pkg/printer/printer.go
index b9e2f6ae..a3dc0dff 100644
--- a/internal/pkg/printer/printer.go
+++ b/internal/pkg/printer/printer.go
@@ -5,9 +5,16 @@ import (
 	"io/ioutil"
 
 	pdfcpuAPI "github.com/hhrutter/pdfcpu/pkg/api"
+	pdfcpuLog "github.com/hhrutter/pdfcpu/pkg/log"
 	pdfcpuConfig "github.com/hhrutter/pdfcpu/pkg/pdfcpu"
 )
 
+func init() {
+	// disable loggers when merging
+	// PDFs.
+	pdfcpuLog.DisableLoggers()
+}
+
 // Printer is a type that can create a PDF file from a source.
 // The source is defined in the underlying implementation.
 type Printer interface {
diff --git a/internal/pkg/printer/printer_test.go b/internal/pkg/printer/printer_test.go
index 43b8d00a..30367eb2 100644
--- a/internal/pkg/printer/printer_test.go
+++ b/internal/pkg/printer/printer_test.go
@@ -16,7 +16,7 @@ func TestMerge(t *testing.T) {
 	err := Merge(
 		[]string{
 			fmt.Sprintf("%s/%s", dirPath, "gotenberg.pdf"),
-			fmt.Sprintf("%s/%s", dirPath, "gotenberg.pdf"),
+			fmt.Sprintf("%s/%s", dirPath, "gotenberg_bis.pdf"),
 		},
 		dst,
 	)
diff --git a/test/testdata/pdf/gotenberg_bis.pdf b/test/testdata/pdf/gotenberg_bis.pdf
new file mode 100644
index 00000000..0a0b284f
Binary files /dev/null and b/test/testdata/pdf/gotenberg_bis.pdf differ