diff --git a/CHANGELOG.md b/CHANGELOG.md
index 89b747a9..ca3d0692 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,11 @@
 CHANGELOG
 =========
 
+2.3.0
+-----
+
+* Disable dev-tools by default
+
 2.2.0
 -----
 
diff --git a/src/ProcessManager/ChromeManager.php b/src/ProcessManager/ChromeManager.php
index 5beb9ebc..69a9707e 100644
--- a/src/ProcessManager/ChromeManager.php
+++ b/src/ProcessManager/ChromeManager.php
@@ -105,7 +105,7 @@ private function getDefaultArguments(): array
         }
 
         // Enable devtools for debugging
-        if (filter_var($_SERVER['PANTHER_DEVTOOLS'] ?? true, \FILTER_VALIDATE_BOOLEAN)) {
+        if (filter_var($_SERVER['PANTHER_DEVTOOLS'] ?? false, \FILTER_VALIDATE_BOOLEAN)) {
             $args[] = '--auto-open-devtools-for-tabs';
         }
 
diff --git a/src/ProcessManager/FirefoxManager.php b/src/ProcessManager/FirefoxManager.php
index 370460cf..020267fa 100644
--- a/src/ProcessManager/FirefoxManager.php
+++ b/src/ProcessManager/FirefoxManager.php
@@ -110,7 +110,7 @@ private function getDefaultArguments(): array
         }
 
         // Enable devtools for debugging
-        if (filter_var($_SERVER['PANTHER_DEVTOOLS'] ?? true, \FILTER_VALIDATE_BOOLEAN)) {
+        if (filter_var($_SERVER['PANTHER_DEVTOOLS'] ?? false, \FILTER_VALIDATE_BOOLEAN)) {
             $args[] = '--devtools';
         }