diff --git a/src/Html/BlockBuilder.php b/src/Html/BlockBuilder.php
index 575071ea7..9c2d03192 100644
--- a/src/Html/BlockBuilder.php
+++ b/src/Html/BlockBuilder.php
@@ -103,7 +103,7 @@ public function append(string $name, string $content): void
      *
      * If the block does not exist, then the `$default` content will be returned instead.
      */
-    public function placeholder(string $name, string $default = ''): string
+    public function placeholder(string $name, string $default = null): ?string
     {
         $result = $this->get($name, $default);
         unset($this->blocks[$name]);
@@ -120,7 +120,7 @@ public function placeholder(string $name, string $default = ''): string
      *
      * If the block does not exist, then the `$default` content will be returned instead.
      */
-    public function get(string $name, string $default = ''): string
+    public function get(string $name, string $default = null): ?string
     {
         if (!isset($this->blocks[$name])) {
             return $default;
diff --git a/tests/Html/BlockBuilderTest.php b/tests/Html/BlockBuilderTest.php
index eede6e329..bcc0b28d4 100644
--- a/tests/Html/BlockBuilderTest.php
+++ b/tests/Html/BlockBuilderTest.php
@@ -229,4 +229,13 @@ public function testContainBetweenBlocks()
         );
         $this->assertEquals('In between', $content);
     }
+
+    public function testGetBlock()
+    {
+        $result = $this->Block->get('non-existent-block');
+        $this->assertNull($result);
+
+        $result = $this->Block->get('non-existent-block', 'default value');
+        $this->assertEquals('default value', $result);
+    }
 }