diff --git a/bin/build_bootstrap.php b/bin/build_bootstrap.php
index fe7b632..ea0d917 100755
--- a/bin/build_bootstrap.php
+++ b/bin/build_bootstrap.php
@@ -36,11 +36,21 @@ SymfonyClassCollectionLoader::load(array(
     '\Mustache_Engine',
     '\Mustache_Compiler',
     '\Mustache_Context',
+    '\Mustache_Exception',
+    '\Mustache_Exception_InvalidArgumentException',
+    '\Mustache_Exception_LogicException',
+    '\Mustache_Exception_RuntimeException',
+    '\Mustache_Exception_SyntaxException',
+    '\Mustache_Exception_UnknownFilterException',
+    '\Mustache_Exception_UnknownHelperException',
+    '\Mustache_Exception_UnknownTemplateException',
     '\Mustache_HelperCollection',
     '\Mustache_LambdaHelper',
     '\Mustache_Loader',
     '\Mustache_Loader_ArrayLoader',
+    '\Mustache_Loader_CascadingLoader',
     '\Mustache_Loader_FilesystemLoader',
+    '\Mustache_Loader_InlineLoader',
     '\Mustache_Loader_MutableLoader',
     '\Mustache_Loader_StringLoader',
     '\Mustache_Logger',