diff --git a/kallithea/controllers/summary.py b/kallithea/controllers/summary.py
--- a/kallithea/controllers/summary.py
+++ b/kallithea/controllers/summary.py
@@ -192,8 +192,8 @@ class SummaryController(BaseRepoControll
         if stats and stats.languages:
             c.no_data = False is c.db_repo.enable_statistics
             lang_stats_d = json.loads(stats.languages)
-            c.commit_data = stats.commit_activity
-            c.overview_data = stats.commit_activity_combined
+            c.commit_data = json.loads(stats.commit_activity)
+            c.overview_data = json.loads(stats.commit_activity_combined)
 
             lang_stats = ((x, {"count": y,
                                "desc": LANGUAGES_EXTENSIONS_MAP.get(x)})
diff --git a/kallithea/templates/summary/statistics.html b/kallithea/templates/summary/statistics.html
--- a/kallithea/templates/summary/statistics.html
+++ b/kallithea/templates/summary/statistics.html
@@ -444,7 +444,8 @@ function SummaryPlot(from,to,dataset,ove
     // user choices on overview
     YUE.on(choiceContainer.getElementsByTagName("input"), "click", plotchoiced, [data, initial_ranges]);
 }
-    SummaryPlot(${h.jshtml(c.ts_min)}, ${h.jshtml(c.ts_max)}, ${h.js(c.commit_data)}, ${h.js(c.overview_data)});
+
+SummaryPlot(${h.js(c.ts_min)}, ${h.js(c.ts_max)}, ${h.js(c.commit_data)}, ${h.js(c.overview_data)});
 </script>
 
 </%def>