diff --git a/public_html/media/js/post-upload.js b/public_html/media/js/post-upload.js
index 85eb29e8..972347c0 100644
--- a/public_html/media/js/post-upload.js
+++ b/public_html/media/js/post-upload.js
@@ -199,7 +199,12 @@ $(function()
 		{
 			postDom.data('url', url);
 			postDom.data('file', '');
-			postDom.find('[name=source]').val(url);
+
+			var sourceInput = postDom.find('[name=source]');
+			sourceInput.val(url);
+			if (sourceInput.attr('maxlength'))
+				sourceInput.val(sourceInput.val().substring(0, sourceInput.attr('maxlength')));
+
 			if (matches = url.match(/watch.*?=([a-zA-Z0-9_-]+)/))
 			{
 				postDom.find('.file-name strong').text(url);
diff --git a/src/Views/input/input-basic.phtml b/src/Views/input/input-basic.phtml
index 2a791e9e..e59000eb 100644
--- a/src/Views/input/input-basic.phtml
+++ b/src/Views/input/input-basic.phtml
@@ -8,6 +8,7 @@ $placeholder = isset($this->context->placeholder) ? $this->context->placeholder
 $additionalInfo = isset($this->context->additionalInfo) ? $this->context->additionalInfo : '';
 $inputClass = isset($this->context->inputClass) ? $this->context->inputClass : '';
 $noAutocomplete = isset($this->context->noAutocomplete) ? true : false;
+$maxLength = isset($this->context->maxLength) ? intval($this->context->maxLength) : null;
 ?>
 
 <div class="form-row">
@@ -16,6 +17,9 @@ $noAutocomplete = isset($this->context->noAutocomplete) ? true : false;
 	</label>
 	<div class="input-wrapper">
 		<input
+			<?php if ($maxLength): ?>
+				maxlength="<?= $maxLength ?>"
+			<?php endif ?>
 			<?php if ($noAutocomplete): ?>
 				autocomplete="off"
 			<?php endif ?>
diff --git a/src/Views/post/post-edit.phtml b/src/Views/post/post-edit.phtml
index d6bb6e1c..411b7008 100644
--- a/src/Views/post/post-edit.phtml
+++ b/src/Views/post/post-edit.phtml
@@ -56,6 +56,7 @@ $post = $this->context->transport->post;
 			$context = new StdClass;
 			$context->label = 'Source';
 			$context->name = 'source';
+			$context->maxLength = Core::getConfig()->posts->maxSourceLength;
 			$context->value = htmlspecialchars($post->getSource());
 			$this->renderExternal('input-text', $context);
 		}
diff --git a/src/Views/post/post-upload.phtml b/src/Views/post/post-upload.phtml
index 80757208..8ca9e53a 100644
--- a/src/Views/post/post-upload.phtml
+++ b/src/Views/post/post-upload.phtml
@@ -115,7 +115,10 @@ $this->assets->addScript('../lib/tagit/jquery.tagit.js');
 				<div class="form-row source">
 					<label>Source:</label>
 					<div class="input-wrapper">
-						<input type="text" name="source" placeholder="where did you get this from? (optional)"/>
+						<input type="text"
+							maxlength="<?= Core::getConfig()->posts->maxSourceLength ?>"
+							name="source"
+							placeholder="where did you get this from? (optional)"/>
 					</div>
 				</div>
 			</form>