diff --git a/compress-cli/src/main/java/dev/openrs2/compress/cli/bzip2/Bunzip2Command.kt b/compress-cli/src/main/java/dev/openrs2/compress/cli/bzip2/Bunzip2Command.kt
index a69d561184..b72c277a4d 100644
--- a/compress-cli/src/main/java/dev/openrs2/compress/cli/bzip2/Bunzip2Command.kt
+++ b/compress-cli/src/main/java/dev/openrs2/compress/cli/bzip2/Bunzip2Command.kt
@@ -10,7 +10,7 @@ import dev.openrs2.compress.bzip2.Bzip2
 
 public class Bunzip2Command : CliktCommand(name = "bunzip2") {
     private val input by option().inputStream().defaultStdin()
-    private val output by option().outputStream().defaultStdout()
+    private val output by option().outputStream(truncateExisting = true).defaultStdout()
 
     override fun run() {
         Bzip2.createHeaderlessInputStream(input).use { input ->
diff --git a/compress-cli/src/main/java/dev/openrs2/compress/cli/bzip2/Bzip2Command.kt b/compress-cli/src/main/java/dev/openrs2/compress/cli/bzip2/Bzip2Command.kt
index 0b0f9355b0..00f8cbb947 100644
--- a/compress-cli/src/main/java/dev/openrs2/compress/cli/bzip2/Bzip2Command.kt
+++ b/compress-cli/src/main/java/dev/openrs2/compress/cli/bzip2/Bzip2Command.kt
@@ -10,7 +10,7 @@ import dev.openrs2.compress.bzip2.Bzip2
 
 public class Bzip2Command : CliktCommand(name = "bzip2") {
     private val input by option().inputStream().defaultStdin()
-    private val output by option().outputStream().defaultStdout()
+    private val output by option().outputStream(truncateExisting = true).defaultStdout()
 
     override fun run() {
         input.use { input ->
diff --git a/compress-cli/src/main/java/dev/openrs2/compress/cli/deflate/DeflateCommand.kt b/compress-cli/src/main/java/dev/openrs2/compress/cli/deflate/DeflateCommand.kt
index bb3f7cd5f9..78199f0af7 100644
--- a/compress-cli/src/main/java/dev/openrs2/compress/cli/deflate/DeflateCommand.kt
+++ b/compress-cli/src/main/java/dev/openrs2/compress/cli/deflate/DeflateCommand.kt
@@ -14,7 +14,7 @@ import java.util.zip.DeflaterOutputStream
 
 public class DeflateCommand : CliktCommand(name = "deflate") {
     private val input by option().inputStream().defaultStdin()
-    private val output by option().outputStream().defaultStdout()
+    private val output by option().outputStream(truncateExisting = true).defaultStdout()
     private val level by option().int().default(Deflater.BEST_COMPRESSION).validate {
         require(it >= Deflater.NO_COMPRESSION && it <= Deflater.BEST_COMPRESSION) {
             "--level must be between ${Deflater.NO_COMPRESSION} and ${Deflater.BEST_COMPRESSION} inclusive"
diff --git a/compress-cli/src/main/java/dev/openrs2/compress/cli/deflate/InflateCommand.kt b/compress-cli/src/main/java/dev/openrs2/compress/cli/deflate/InflateCommand.kt
index 433f57beb6..e429caae69 100644
--- a/compress-cli/src/main/java/dev/openrs2/compress/cli/deflate/InflateCommand.kt
+++ b/compress-cli/src/main/java/dev/openrs2/compress/cli/deflate/InflateCommand.kt
@@ -11,7 +11,7 @@ import java.util.zip.InflaterInputStream
 
 public class InflateCommand : CliktCommand(name = "inflate") {
     private val input by option().inputStream().defaultStdin()
-    private val output by option().outputStream().defaultStdout()
+    private val output by option().outputStream(truncateExisting = true).defaultStdout()
 
     override fun run() {
         InflaterInputStream(input, Inflater(true)).use { input ->
diff --git a/compress-cli/src/main/java/dev/openrs2/compress/cli/gzip/GunzipCommand.kt b/compress-cli/src/main/java/dev/openrs2/compress/cli/gzip/GunzipCommand.kt
index edd67178ed..bca04becb7 100644
--- a/compress-cli/src/main/java/dev/openrs2/compress/cli/gzip/GunzipCommand.kt
+++ b/compress-cli/src/main/java/dev/openrs2/compress/cli/gzip/GunzipCommand.kt
@@ -10,7 +10,7 @@ import dev.openrs2.compress.gzip.Gzip
 
 public class GunzipCommand : CliktCommand(name = "gunzip") {
     private val input by option().inputStream().defaultStdin()
-    private val output by option().outputStream().defaultStdout()
+    private val output by option().outputStream(truncateExisting = true).defaultStdout()
 
     override fun run() {
         Gzip.createHeaderlessInputStream(input).use { input ->
diff --git a/compress-cli/src/main/java/dev/openrs2/compress/cli/gzip/GzipCommand.kt b/compress-cli/src/main/java/dev/openrs2/compress/cli/gzip/GzipCommand.kt
index bbd653d2bf..becca157fc 100644
--- a/compress-cli/src/main/java/dev/openrs2/compress/cli/gzip/GzipCommand.kt
+++ b/compress-cli/src/main/java/dev/openrs2/compress/cli/gzip/GzipCommand.kt
@@ -14,7 +14,7 @@ import java.util.zip.Deflater
 
 public class GzipCommand : CliktCommand(name = "gzip") {
     private val input by option().inputStream().defaultStdin()
-    private val output by option().outputStream().defaultStdout()
+    private val output by option().outputStream(truncateExisting = true).defaultStdout()
     private val level by option().int().default(Deflater.BEST_COMPRESSION).validate {
         require(it >= Deflater.NO_COMPRESSION && it <= Deflater.BEST_COMPRESSION) {
             "--level must be between ${Deflater.NO_COMPRESSION} and ${Deflater.BEST_COMPRESSION} inclusive"
diff --git a/compress-cli/src/main/java/dev/openrs2/compress/cli/lzma/LzmaCommand.kt b/compress-cli/src/main/java/dev/openrs2/compress/cli/lzma/LzmaCommand.kt
index aad1b45c09..42a06a4284 100644
--- a/compress-cli/src/main/java/dev/openrs2/compress/cli/lzma/LzmaCommand.kt
+++ b/compress-cli/src/main/java/dev/openrs2/compress/cli/lzma/LzmaCommand.kt
@@ -14,7 +14,7 @@ import org.tukaani.xz.LZMA2Options
 
 public class LzmaCommand : CliktCommand(name = "lzma") {
     private val input by option().inputStream().defaultStdin()
-    private val output by option().outputStream().defaultStdout()
+    private val output by option().outputStream(truncateExisting = true).defaultStdout()
     private val level by option().int().default(LZMA2Options.PRESET_DEFAULT).validate {
         require(it >= LZMA2Options.PRESET_MIN && it <= LZMA2Options.PRESET_MAX) {
             "--level must be between ${LZMA2Options.PRESET_MIN} and ${LZMA2Options.PRESET_MAX} inclusive"
diff --git a/compress-cli/src/main/java/dev/openrs2/compress/cli/lzma/UnlzmaCommand.kt b/compress-cli/src/main/java/dev/openrs2/compress/cli/lzma/UnlzmaCommand.kt
index 2fb8f1725e..ab6a117379 100644
--- a/compress-cli/src/main/java/dev/openrs2/compress/cli/lzma/UnlzmaCommand.kt
+++ b/compress-cli/src/main/java/dev/openrs2/compress/cli/lzma/UnlzmaCommand.kt
@@ -13,7 +13,7 @@ import dev.openrs2.compress.lzma.Lzma
 public class UnlzmaCommand : CliktCommand(name = "unlzma") {
     private val input by option().inputStream().defaultStdin()
     private val length by option().long().required()
-    private val output by option().outputStream().defaultStdout()
+    private val output by option().outputStream(truncateExisting = true).defaultStdout()
 
     override fun run() {
         Lzma.createHeaderlessInputStream(input, length).use { input ->