diff --git a/cli/Valet/Brew.php b/cli/Valet/Brew.php
index cc15896..b6f2aab 100644
--- a/cli/Valet/Brew.php
+++ b/cli/Valet/Brew.php
@@ -42,8 +42,7 @@ function hasInstalledPhp()
     {
         return $this->installed('php71')
             || $this->installed('php70')
-            || $this->installed('php56')
-            || $this->installed('php55');
+            || $this->installed('php56');
     }
 
     /**
@@ -146,8 +145,6 @@ function linkedPhp()
             return 'php70';
         } elseif (strpos($resolvedPath, 'php56') !== false) {
             return 'php56';
-        } elseif (strpos($resolvedPath, 'php55') !== false) {
-            return 'php55';
         } else {
             throw new DomainException("Unable to determine linked PHP.");
         }
diff --git a/cli/Valet/PhpFpm.php b/cli/Valet/PhpFpm.php
index 3733396..e0eb42a 100644
--- a/cli/Valet/PhpFpm.php
+++ b/cli/Valet/PhpFpm.php
@@ -38,8 +38,7 @@ function install()
     {
         if (! $this->brew->installed('php71') &&
             ! $this->brew->installed('php70') &&
-            ! $this->brew->installed('php56') &&
-            ! $this->brew->installed('php55')) {
+            ! $this->brew->installed('php56')) {
             $this->brew->ensureInstalled('php71', [], $this->taps);
         }
 
@@ -88,7 +87,7 @@ function restart()
      */
     function stop()
     {
-        $this->brew->stopService('php55', 'php56', 'php70', 'php71');
+        $this->brew->stopService('php56', 'php70', 'php71');
     }
 
     /**
@@ -102,7 +101,6 @@ function fpmConfigPath()
             'php71' => '/usr/local/etc/php/7.1/php-fpm.d/www.conf',
             'php70' => '/usr/local/etc/php/7.0/php-fpm.d/www.conf',
             'php56' => '/usr/local/etc/php/5.6/php-fpm.conf',
-            'php55' => '/usr/local/etc/php/5.5/php-fpm.conf',
         ];
 
         return $confLookup[$this->brew->linkedPhp()];
diff --git a/cli/includes/compatibility.php b/cli/includes/compatibility.php
index 942b7d1..adc64e5 100644
--- a/cli/includes/compatibility.php
+++ b/cli/includes/compatibility.php
@@ -11,8 +11,8 @@
     exit(1);
 }
 
-if (version_compare(PHP_VERSION, '5.5.9', '<')) {
-    echo "Valet requires PHP 5.5.9 or later.";
+if (version_compare(PHP_VERSION, '5.6.0', '<')) {
+    echo "Valet requires PHP 5.6 or later.";
 
     exit(1);
 }
diff --git a/composer.json b/composer.json
index e528016..cdb852f 100644
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,7 @@
         }
     },
     "require": {
-        "php": ">=5.5.9",
+        "php": ">=5.6",
         "illuminate/container": "~5.1",
         "mnapoli/silly": "~1.0",
         "symfony/process": "~2.7|~3.0",
diff --git a/tests/BrewTest.php b/tests/BrewTest.php
index c4bd9b6..af380b9 100644
--- a/tests/BrewTest.php
+++ b/tests/BrewTest.php
@@ -69,21 +69,18 @@ public function test_has_installed_php_indicates_if_php_is_installed_via_brew()
         $brew->shouldReceive('installed')->once()->with('php71')->andReturn(true);
         $brew->shouldReceive('installed')->with('php70')->andReturn(true);
         $brew->shouldReceive('installed')->with('php56')->andReturn(true);
-        $brew->shouldReceive('installed')->with('php55')->andReturn(true);
         $this->assertTrue($brew->hasInstalledPhp());
 
         $brew = Mockery::mock(Brew::class.'[installed]', [new CommandLine, new Filesystem]);
         $brew->shouldReceive('installed')->once()->with('php70')->andReturn(true);
         $brew->shouldReceive('installed')->with('php71')->andReturn(false);
         $brew->shouldReceive('installed')->with('php56')->andReturn(false);
-        $brew->shouldReceive('installed')->with('php55')->andReturn(false);
         $this->assertTrue($brew->hasInstalledPhp());
 
         $brew = Mockery::mock(Brew::class.'[installed]', [new CommandLine, new Filesystem]);
         $brew->shouldReceive('installed')->once()->with('php71')->andReturn(false);
         $brew->shouldReceive('installed')->once()->with('php70')->andReturn(false);
         $brew->shouldReceive('installed')->once()->with('php56')->andReturn(false);
-        $brew->shouldReceive('installed')->once()->with('php55')->andReturn(false);
         $this->assertFalse($brew->hasInstalledPhp());
     }