diff --git a/mediawiki-php-wikidiff2 b/mediawiki-php-wikidiff2
index 8639762..a9547bc 160000
--- a/mediawiki-php-wikidiff2
+++ b/mediawiki-php-wikidiff2
@@ -1 +1 @@
-Subproject commit 8639762681cb05aabb644743fee715fabe1263d4
+Subproject commit a9547bcef9f84bd87f7d627c41ec5dae95365e6b
diff --git a/pywikidiff2/pywikidiff2.cpp b/pywikidiff2/pywikidiff2.cpp
index d50112f..64ac8d8 100644
--- a/pywikidiff2/pywikidiff2.cpp
+++ b/pywikidiff2/pywikidiff2.cpp
@@ -34,6 +34,9 @@ pywikidiff2_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
     self->config.maxSplitSize = 1;
     self->config.initialSplitThreshold = 0.1;
     self->config.finalSplitThreshold = 0.6;
+    self->config.wordsCacheCapacity = 10000;
+    self->config.diffCacheCapacity = 10000;
+    self->config.statsCacheCapacity = 100000;
     return (PyObject *) self;
 }
 
@@ -41,7 +44,7 @@ static int
 pywikidiff2_init(pywikidiff2Obj *self, PyObject *args, PyObject *kwds)
 {
   // here's where we set non-default configuration values
-  static char *kwlist[] = {"numContextLines", "moved_line_threshold", "change_threshold", "moved_paragraph_detection_cutoff", "max_word_level_diff_complexity", "max_split_size", "initial_split_threshold", "final_split_threshold", NULL};
+  static char *kwlist[] = {"numContextLines", "moved_line_threshold", "change_threshold", "moved_paragraph_detection_cutoff", "max_word_level_diff_complexity", "max_split_size", "initial_split_threshold", "final_split_threshold", "words_cache_capacity", "diff_cache_capacity", "stats_cache_capacity", NULL};
   if (!PyArg_ParseTupleAndKeywords(args, kwds, "|iffiiiff", kwlist,
 				   &self->config.numContextLines,
 				   &self->config.movedLineThreshold,
@@ -50,7 +53,10 @@ pywikidiff2_init(pywikidiff2Obj *self, PyObject *args, PyObject *kwds)
 				   &self->config.maxWordLevelDiffComplexity,
 				   &self->config.maxSplitSize,
 				   &self->config.initialSplitThreshold,
-				   &self->config.finalSplitThreshold
+				   &self->config.finalSplitThreshold,
+				   &self->config.wordsCacheCapacity,
+				   &self->config.diffCacheCapacity,
+				   &self->config.statsCacheCapacity
 				   )){
     PyErr_SetString(PyExc_ImportError,"Error in configuration");
     return -1;