diff --git a/src/Console/Addon.php b/src/Console/Addon.php
index 74b081810..13e1951f2 100644
--- a/src/Console/Addon.php
+++ b/src/Console/Addon.php
@@ -82,7 +82,7 @@ HELP;
 		AddonCore::loadAddons();
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		if ($this->getOption('v')) {
 			$this->out('Class: ' . __CLASS__);
diff --git a/src/Console/ArchiveContact.php b/src/Console/ArchiveContact.php
index 4990d99e0..4bd832a61 100644
--- a/src/Console/ArchiveContact.php
+++ b/src/Console/ArchiveContact.php
@@ -80,7 +80,7 @@ HELP;
 		$this->l10n = $l10n;
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		if ($this->getOption('v')) {
 			$this->out('Class: ' . __CLASS__);
diff --git a/src/Console/AutomaticInstallation.php b/src/Console/AutomaticInstallation.php
index ca25d71a6..1a6d10c24 100644
--- a/src/Console/AutomaticInstallation.php
+++ b/src/Console/AutomaticInstallation.php
@@ -110,7 +110,7 @@ HELP;
 		$this->dba         = $dba;
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		// Initialise the app
 		$this->out("Initializing setup...");
diff --git a/src/Console/Cache.php b/src/Console/Cache.php
index e02d2225a..5062872e8 100644
--- a/src/Console/Cache.php
+++ b/src/Console/Cache.php
@@ -90,7 +90,7 @@ HELP;
 		$this->cache   = $cache;
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		if ($this->getOption('v')) {
 			$this->out('Executable: ' . $this->executable);
diff --git a/src/Console/Config.php b/src/Console/Config.php
index e32983a68..760b1ca51 100644
--- a/src/Console/Config.php
+++ b/src/Console/Config.php
@@ -102,7 +102,7 @@ HELP;
 		$this->config = $config;
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		if ($this->getOption('v')) {
 			$this->out('Executable: ' . $this->executable);
diff --git a/src/Console/Contact.php b/src/Console/Contact.php
index f051d870a..37f3f056e 100644
--- a/src/Console/Contact.php
+++ b/src/Console/Contact.php
@@ -76,7 +76,7 @@ HELP;
 		$this->appMode = $appMode;
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		if ($this->getOption('v')) {
 			$this->out('Class: ' . __CLASS__);
diff --git a/src/Console/CreateDoxygen.php b/src/Console/CreateDoxygen.php
index f7cdeaa3e..3d5ba865c 100644
--- a/src/Console/CreateDoxygen.php
+++ b/src/Console/CreateDoxygen.php
@@ -45,7 +45,7 @@ HELP;
 		return $help;
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		if ($this->getOption('v')) {
 			$this->out('Class: ' . __CLASS__);
diff --git a/src/Console/DatabaseStructure.php b/src/Console/DatabaseStructure.php
index 7bb7120fa..88f12476f 100644
--- a/src/Console/DatabaseStructure.php
+++ b/src/Console/DatabaseStructure.php
@@ -94,7 +94,7 @@ HELP;
 		$this->basePath = $basePath->getPath();
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		if ($this->getOption('v')) {
 			$this->out('Class: ' . __CLASS__);
diff --git a/src/Console/DocBloxErrorChecker.php b/src/Console/DocBloxErrorChecker.php
index 9e9eb1497..3d3a2b6d8 100644
--- a/src/Console/DocBloxErrorChecker.php
+++ b/src/Console/DocBloxErrorChecker.php
@@ -71,7 +71,7 @@ HELP;
 		return $help;
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		if ($this->getOption('v')) {
 			$this->out('Class: ' . __CLASS__);
diff --git a/src/Console/Extract.php b/src/Console/Extract.php
index 1d651f641..06015f697 100644
--- a/src/Console/Extract.php
+++ b/src/Console/Extract.php
@@ -49,7 +49,7 @@ HELP;
 		return $help;
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		if ($this->getOption('v')) {
 			$this->out('Class: ' . __CLASS__);
diff --git a/src/Console/FixAPDeliveryWorkerTaskParameters.php b/src/Console/FixAPDeliveryWorkerTaskParameters.php
index e4b895dea..eb285da8d 100644
--- a/src/Console/FixAPDeliveryWorkerTaskParameters.php
+++ b/src/Console/FixAPDeliveryWorkerTaskParameters.php
@@ -85,7 +85,7 @@ HELP;
 		$this->l10n = $l10n;
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		if ($this->getOption('v')) {
 			$this->out('Class: ' . __CLASS__);
diff --git a/src/Console/GlobalCommunityBlock.php b/src/Console/GlobalCommunityBlock.php
index 39ce6d301..81099712e 100644
--- a/src/Console/GlobalCommunityBlock.php
+++ b/src/Console/GlobalCommunityBlock.php
@@ -70,7 +70,7 @@ HELP;
 		$this->l10n = $l10n;
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		if ($this->getOption('v')) {
 			$this->out('Class: ' . __CLASS__);
diff --git a/src/Console/GlobalCommunitySilence.php b/src/Console/GlobalCommunitySilence.php
index a493bbcb8..89674efd3 100644
--- a/src/Console/GlobalCommunitySilence.php
+++ b/src/Console/GlobalCommunitySilence.php
@@ -75,7 +75,7 @@ HELP;
 		$this->dba  =$dba;
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		if ($this->getOption('v')) {
 			$this->out('Class: ' . __CLASS__);
diff --git a/src/Console/Lock.php b/src/Console/Lock.php
index eea5d51e1..a89f3d861 100644
--- a/src/Console/Lock.php
+++ b/src/Console/Lock.php
@@ -84,7 +84,7 @@ HELP;
 		$this->lock    = $lock;
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		if ($this->getOption('v')) {
 			$this->out('Executable: ' . $this->executable);
diff --git a/src/Console/Maintenance.php b/src/Console/Maintenance.php
index 7e7318284..7744c9ee4 100644
--- a/src/Console/Maintenance.php
+++ b/src/Console/Maintenance.php
@@ -77,7 +77,7 @@ HELP;
 		$this->config = $config;
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		if ($this->getOption('v')) {
 			$this->out('Class: ' . __CLASS__);
diff --git a/src/Console/MergeContacts.php b/src/Console/MergeContacts.php
index 543ad316e..0d05c579f 100644
--- a/src/Console/MergeContacts.php
+++ b/src/Console/MergeContacts.php
@@ -67,7 +67,7 @@ HELP;
 		$this->l10n = $l10n;
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		$duplicates = $this->dba->p("SELECT COUNT(*) AS `total`, `uri-id`, MAX(`url`) AS `url` FROM `contact` WHERE `uid` = 0 GROUP BY `uri-id` HAVING total > 1");
 		while ($duplicate = $this->dba->fetch($duplicates)) {
diff --git a/src/Console/MoveToAvatarCache.php b/src/Console/MoveToAvatarCache.php
index 441dff682..1f3147791 100644
--- a/src/Console/MoveToAvatarCache.php
+++ b/src/Console/MoveToAvatarCache.php
@@ -85,7 +85,7 @@ HELP;
 		$this->config = $config;
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		if (!$this->config->get('system', 'avatar_cache')) {
 			$this->err($this->l10n->t('The avatar cache needs to be enabled to use this command.'));
diff --git a/src/Console/PhpToPo.php b/src/Console/PhpToPo.php
index a6667048f..4041c4069 100644
--- a/src/Console/PhpToPo.php
+++ b/src/Console/PhpToPo.php
@@ -63,7 +63,7 @@ HELP;
 		return $help;
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		if ($this->getOption('v')) {
 			$this->out('Class: ' . __CLASS__);
diff --git a/src/Console/PoToPhp.php b/src/Console/PoToPhp.php
index b67327826..4f28db88b 100644
--- a/src/Console/PoToPhp.php
+++ b/src/Console/PoToPhp.php
@@ -50,7 +50,7 @@ HELP;
 		return $help;
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		if ($this->getOption('v')) {
 			$this->out('Class: ' . __CLASS__);
diff --git a/src/Console/PostUpdate.php b/src/Console/PostUpdate.php
index 376d3abb4..8bec14e27 100644
--- a/src/Console/PostUpdate.php
+++ b/src/Console/PostUpdate.php
@@ -69,7 +69,7 @@ HELP;
 		$this->l10n = $l10n;
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		$a = \Friendica\DI::app();
 
diff --git a/src/Console/Relay.php b/src/Console/Relay.php
index 4f6bbc6b6..56a3c3186 100644
--- a/src/Console/Relay.php
+++ b/src/Console/Relay.php
@@ -76,7 +76,7 @@ HELP;
 		$this->dba = $dba;
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		if ($this->getOption('v')) {
 			$this->out('Executable: ' . $this->executable);
diff --git a/src/Console/Relocate.php b/src/Console/Relocate.php
index c0054d396..c1db6ef53 100644
--- a/src/Console/Relocate.php
+++ b/src/Console/Relocate.php
@@ -74,7 +74,7 @@ HELP;
 		$this->config   = $config;
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		if (count($this->args) == 0) {
 			$this->out($this->getHelp());
diff --git a/src/Console/ServerBlock.php b/src/Console/ServerBlock.php
index 9bf2c0ecc..38ae35d10 100644
--- a/src/Console/ServerBlock.php
+++ b/src/Console/ServerBlock.php
@@ -79,7 +79,7 @@ HELP;
 		$this->config = $config;
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		if (count($this->args) == 0) {
 			$this->printBlockedServers($this->config);
diff --git a/src/Console/Storage.php b/src/Console/Storage.php
index d5af7c513..587601ba0 100644
--- a/src/Console/Storage.php
+++ b/src/Console/Storage.php
@@ -69,7 +69,7 @@ HELP;
 		return $help;
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		if ($this->getOption('v')) {
 			$this->out('Executable: ' . $this->executable);
diff --git a/src/Console/Test.php b/src/Console/Test.php
index 062e386f0..15c6bf60b 100644
--- a/src/Console/Test.php
+++ b/src/Console/Test.php
@@ -42,7 +42,7 @@ HELP;
 		return $help;
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		if ($this->getOption('v')) {
 			$this->out('Class: ' . __CLASS__);
diff --git a/src/Console/Typo.php b/src/Console/Typo.php
index 1397f6092..4414662e7 100644
--- a/src/Console/Typo.php
+++ b/src/Console/Typo.php
@@ -60,7 +60,7 @@ HELP;
 		$this->config = $config;
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		if ($this->getOption('v')) {
 			$this->out('Class: ' . __CLASS__);
diff --git a/src/Console/User.php b/src/Console/User.php
index 1c1d26b0a..586c300ea 100644
--- a/src/Console/User.php
+++ b/src/Console/User.php
@@ -97,7 +97,7 @@ HELP;
 		$this->pConfig = $pConfig;
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		if ($this->getOption('v')) {
 			$this->out('Class: ' . __CLASS__);
diff --git a/src/Core/Console.php b/src/Core/Console.php
index ebd4c51a9..2521e21be 100644
--- a/src/Core/Console.php
+++ b/src/Core/Console.php
@@ -121,7 +121,7 @@ HELP;
 		$this->dice = $dice;
 	}
 
-	protected function doExecute()
+	protected function doExecute(): int
 	{
 		if ($this->getOption('v')) {
 			$this->out('Executable: ' . $this->executable);