diff --git a/bin/build_bootstrap.php b/bin/build_bootstrap.php
index 887eb29..fe7b632 100755
--- a/bin/build_bootstrap.php
+++ b/bin/build_bootstrap.php
@@ -37,11 +37,15 @@ SymfonyClassCollectionLoader::load(array(
     '\Mustache_Compiler',
     '\Mustache_Context',
     '\Mustache_HelperCollection',
+    '\Mustache_LambdaHelper',
+    '\Mustache_Loader',
     '\Mustache_Loader_ArrayLoader',
     '\Mustache_Loader_FilesystemLoader',
     '\Mustache_Loader_MutableLoader',
     '\Mustache_Loader_StringLoader',
-    '\Mustache_Loader',
+    '\Mustache_Logger',
+    '\Mustache_Logger_AbstractLogger',
+    '\Mustache_Logger_StreamLogger',
     '\Mustache_Parser',
     '\Mustache_Template',
     '\Mustache_Tokenizer',